bluuebunny/crossref_metadata_2025 huggingface dataset:
Erratum: Gauge theory applied to magnetic lattices
Authors: Di Pietro A. , Ansalone P. , Basso V. , Magni A. , Durin G.
Published: March 2023

Original article:
EPL, 140 (2022) 46003.
Circulating Chemerin Is Elevated in Women With Preeclampsia
Authors: Bartho Lucy A , Kandel Manju , Walker Susan P , Cluver Catherine A , Hastie Roxanne , Bergman Lina , Pritchard Natasha , Cannon Ping , Nguyen Tuong-Vi , Wong Georgia P , MacDonald Teresa M , Keenan Emerson , Hannan Natalie J , Tong Stephen , Kaitu’u-Lino Tu’uhevaha J
Published: March 2023

Background: Preeclampsia is a severe complication of pregnancy. Chemerin is an adipokine secreted from adipose tissue and highly expressed in placenta. This study evaluated the biomarker potential of circulating chemerin to predict preeclampsia.

Methods: Maternal plasma and placenta were collected from women with early-onset preeclampsia (<34 weeks), with preeclampsia and eclampsia, or before preeclampsia diagnosis (36 weeks). Human trophoblast stem cells were differentiated into syncytiotrophoblast or extravillous trophoblasts across 96 hours. Cells were cultured in 1% O2 (hypoxia) or 5% O2 (normoxia). Chemerin was measured by enzyme-linked immunosorbent assay (ELISA) and RARRES2 (gene coding chemerin) by reverse transcription-quantitative polymerase chain reaction.

Results: Circulating chemerin was increased in 46 women with early-onset preeclampsia (<34 weeks) compared to 17 controls (P < .0006). Chemerin was increased in placenta from 43 women with early-onset preeclampsia compared to 24 controls (P < .0001). RARRES2 was reduced in placenta from 43 women with early-onset preeclampsia vs 24 controls (P < .0001).

Chemerin was increased in plasma from 26 women with established preeclampsia (P = .006), vs 15 controls. Circulating chemerin was increased in 23 women who later developed preeclampsia vs 182 who did not (P = 3.23 × 10−6).

RARRES2 was reduced in syncytiotrophoblast (P = .005) or extravillous trophoblasts (P < .0001). Hypoxia increased RARRES2 expression in syncytiotrophoblast (P = .01) but not cytotrophoblast cells.

Conclusions: Circulating chemerin was elevated in women with early-onset preeclampsia, established preeclampsia, and preceding preeclampsia diagnosis of preeclampsia. RARRES2 was dysregulated in placenta complicated by preeclampsia and may be regulated through hypoxia. Chemerin may have potential as a biomarker for preeclampsia but would need to be combined with other biomarkers.
Biblical and Theological Literacy and Victorian Studies Today
Authors: Larsen Timothy
Published: March 2023

This article explores the current state of biblical and theological literacy in the discipline of Victorian studies. It observes the ordinarily strong, careful, and impressive work done in recent decades, especially since some scholars have become interested in a postsecular approach to the field. It also, however, presents some egregious lapses in basic biblical and theological literacy that mar otherwise meticulous contemporary scholarship. This article hopes to open a conversation on how such glaring errors and misunderstandings have found their way into peer-reviewed work over and over again and to invite Victorian scholars to commit to finding ways to prevent this in the future.
Αρχαίος φιλοσοφικός λόγος στην αναλυτική του Φουκώ για τον Εαυτό και τη Βιοεξουσία
Authors: Ασβέστη Μαρία
Published: March 2023

Ο Φουκώ είναι ο φιλόσοφος, ο οποίος στην παράδοση του Νίτσε και του Φρόυντ αμφισβητεί στο έπακρο το υποκείμενο ως οντότητα και θεωρεί αυτό στην επιστημολογική κριτική του ως υποστασιοποιημένη έννοια. Όπως και ο Φρόυντ, ο Φουκώ θεωρεί την σεξουαλικότητα ως το σημείο μηδέν της αντίληψης του εγώ μέσω της έννοιας της χρήσης των αφροδισίων και της επιμέλειας εαυτού. Ενώ μέχρι την συγγραφή της Ιστορίας της Σεξουαλικότητας ο Φουκώ περιορίζει την ιστορική επιστημολογία του σε γλωσσικά μορφώματα του Λόγου της Νεωτερικότητας, για πρώτη φορά ανάγεται στα πλαίσια της έρευνάς του για την αντίληψη του εαυτού καταρχήν σε πρωτοχριστιανικές ασκητικές πρακτικές άρνησης και υπέρβασης της σωματικής υλικότητας, κατόπιν δε, επεκτείνει τον ορίζοντα της έρευνάς του αναδρομικά από την νεοπλατωνική έως και την κλασσική φιλοσοφική σκέψη. Αυτή η στροφή του Φουκώ αποτελεί την αφετηρία για τo παρόν ερευνητικό άρθρο στο οποίο θα εξεταστεί η θεμελίωση της αναλυτικής έννοιας της υποκειμενικότητας στην έννοια του εαυτού και της αυτεπίγνωσης. Αφετηρία για τα παραπάνω θα αποτελέσει ο όρος ''επιμέλεια εαυτού'', ο οποίος συνδέει την αντίληψη της σωματικότητας με την αντίληψη του εαυτού ως αντικειμένου της σκέψης.
Framework for virtual education of COVID-19 vaccines for Mandarin-speaking learners: an educational intervention module
Authors: Wang JiCi , Moy Benjamin M. , Kaufhold Ross T. , Muzaurieta Aurelio , Xia Yang , Jiang Shannon , Yim Angela , Chang Miller Jane , Zhou Shiwei , Lee Pearl , Hou Lisa , Lee Janilla , Heung Michael
Published: March 2023

Background: In the United States, patients with limited English proficiency face significant barriers to comprehending and acting upon health-related information, particularly during the COVID-19 pandemic. The ability of health professionals to communicate COVID-19-related information to Mandarin-speaking patients has proved critical in discussions about vaccine efficacy, side effects, and post-vaccine protection.

Methods: The authors created a one-hour educational module to help Mandarin-speaking medical students better convey COVID-19 vaccine information to Mandarin-only speakers. The module is composed of an educational guide, which introduced key terminology and addressed commonly asked questions, and pre- and post-surveys. The authors recruited 59 Mandarin-speaking medical students all of whom had previously completed a medical Mandarin elective. The module and surveys were distributed and completed in August 2021. Data analysis measured the change in aggregate mean for subjective five-point Likert-scale questions and change in percent accuracy for objective knowledge-based questions.

Results: The educational module significantly improved participants' subjective comfort level in discussing the COVID-19 vaccine in English and Mandarin. The largest improvement in both English and Mandarin was demonstrated in the participants ability to explain differences between the COVID-19 vaccines, with an aggregate mean improvement of 0.39 for English and 1.48 for Mandarin. Survey respondents also demonstrated increased percent accuracy in knowledge-based objective questions in Mandarin.

Conclusions: This module provides Mandarin-learning medical students with skills to deliver reliable information to the general population and acts as a model for the continued development of educational modules for multilingual medical professionals.
TOPLUMUN SOKAKTAKİ AYNASI: DUVAR YAZILARINDA MİZAHIN KULLANIMI
Authors: YILMAZ Aysun Ezgi
Published: March 2023

Sosyal hayatta yer alan birçok etmen, bireylerin kendilerini doğrudan ifade etmesinin önünde engel teşkil etmektedir. İnsanlığın bu engeller karşısında direniş yöntemlerinden biri ise mizahtır. Doğrudan ifade edilemeyen hususlar, mizah aracılığıyla dile getirilirken toplumun sosyal, siyasal, ekonomik, kültürel vb. dinamikleri de ayrıntılı olarak açığa çıkmaktadır. Türk kültüründe Keloğlan, Nasreddin Hoca, Karagöz halk mizahının geleneksel temsilcileri olarak kabul edilirken günümüzde küresel bir köy haline gelen dünyada, iletişim kanallarının gelişmesi ve genişlemesi ile mizahın icra biçimlerinin çeşitlendiği görülmektedir. Bir yandan hâlâ geleneksel olarak devam ettirilen mizah, diğer yandan sosyal medya vb. platformlarda sürdürülmektedir. Bu bağlamda mizahın görüldüğü bir başka alan ise kamusal alanlar içerisinde değerlendirilen sokak duvarlarıdır. Gerek bireysel gerekse toplumsal konularla ilgili duygu ve düşüncelerin paylaşıldığı duvar yazılarında dilsel açıdan farklı kullanımların varlığı dikkat çekmektedir. Çalışma kapsamında mizahi bir dil kullanıldığı düşünülen duvar yazıları ele alınmıştır. Yakın dönem duvar yazıları üzerine yapılan bu incelemede; insanlık tarihinin başlangıcından bu yana varlığını sürdüren duvar yazılarının günümüz kent kültürü içerisinde nasıl bir iletişim kanalı olduğu gösterilmiş Türk toplumunda son on yılda (2011-2021) yaşanan sosyal, siyasal, kültürel değişimlerin mizaha nasıl yansıdığı ve bu değişimlerin mizahı nasıl şekillendirdiği değerlendirilmiştir
ANADOLU MASALLARINDAKİ YASAK (TABU) MOTİFLERİNİN KÜLTÜREL UNSURLAR AÇISINDAN İNCELENMESİ
Authors: BOZ İbrahim
Published: March 2023

Bir milletin kültürel kodlarını içeren ve sözlü anlatılar olan masallarda oluştuğu yörenin dili, yaşayışı ve kültürel özelliklerine ait unsurları bulmak mümkündür. Bu bakımdan masallar kültürel belleğin gelecek kuşaklara aktarılmasında önemli işlevler üstlenir.

Masal motifleri ise birçok masalda tekrarlanan, genellikle sıra dışı, olağanüstü özellikler taşıyan ve oluştuğu kültürün özelliklerini barındıran küçük unsurlardır. Bu bakımdan motifler kurgunun oluşmasında, olayların ve kişilerin ortaya çıkmasında, kültürel kodların taşınmasında etkili olmaktadır. Ayrıca bu motifler arasında sıkı sıkıya bir ilişki vardır ve bir motif diğer motifin ortaya çıkmasında aracı rol üstlenir.

Bu çalışmada Motif Index’te bulunan yasak (tabu) motifi incelenmiştir. Öncelikle masal ve motif kavramları üzerinde durulmuştur. Daha sonra Pertev Naili Boratav’ın Zaman Zaman İçinde ve Az Gittik Uz Gittik kitapları incelenmiş ve bu kitaplarda yer alan, yasak motifleri içeren Bacı Bacı Can Bacı, Yedi Kardeşler, Dülger Kızı, Yıldırım Padişahı, Dünya Güzeli, Yeraltı Diyarının Kartalı adlı masallar incelenmeye çalışılmıştır. Bu anlatılarda yer alan yasak motiflerinin kültürel kodları taşıyıp taşımadığı ortaya çıkarılmaya çalışılmıştır. Ayrıca olayların gelişmesine ve kişilerin çeşitlenmesine olan etkisi üzerinde durulmuştur. Vladimir Propp’un Masalın Biçimbilimi adlı eserinde belirttiği üzere yasağın mutlaka çiğnendiği görülmüştür. Yasağın çiğnenmesinden sonra kahramanın başına birçok bela gelmekte, kahraman bu belaları aşmak için imtihan/imtihanlara tabi tutulmaktadır. Böylelikle yasak motifi diğer motiflerin ortaya çıkmasında ve anlatıya diğer olay/kişilerin katılmasında etkili olmaktadır. Bunun yanında Anadolu masallarında yer alan yasak motiflerinin kültürel kodları içerdiği ve bu kodları taşıyıcılık işlevinde kullanıldığı tespit edilmiştir.
ORTAOKUL MÜZİK DERSİ ÖĞRETİM PROGRAMININ KÜLTÜR AKTARIMINDAKİ YERİ: ÖĞRETMEN GÖRÜŞLERİ
Authors: ÜSTÜN Hamza , DEMİRTAŞ Erkan
Published: March 2023

Kültür, bir toplumun tüm özelliklerinin birleşiminden oluşan, yaşam biçimlerini, geleneklerini, inançlarını kapsayan büyük bir olgudur. İnsanlar ilk olarak aileleri ve yakın çevreleri ile etkileşime girerek kültürel farkındalıklarını arttırırlar. Eğitim hayatının başlaması ile kültür aktarımı okul yaşantısı ile sistematik bir şekilde ilerlemeye devam eder. Bu ilerlemenin en önemli yürütücüleri Milli Eğitim Bakanlığı tarafından yayınlanan öğretim programını uygulayan öğretmenlerdir. Bu çalışma, ortaokul müzik dersi öğretim programının kültür aktarımındaki durumunu belirlemeyi amaçlamaktadır. Çalışma, nitel araştırma yöntemlerinden görüşme tekniği ile yürütülmüştür Bu kapsamda ortaokul seviyesinde eğitim veren yirmi müzik öğretmeninin görüşlerine başvurulmuştur. Elde edinilen görüşler belirlenen temaya göre analiz edilerek açıklanmaya çalışılmıştır.. Elde edinilen bulgular neticesinde, öğretim programının kültürel öğeleri aktarımı açısından yeterli düzeyde olmadığı sonucuna ulaşılmıştır. Ders kitaplarında yer alan kültürel öğeleri içeren örneklendirmelerin sayılarının az olduğu, öğretmenlerin de kültürel öğeleri aktarmada yetersizliklerinin bulunduğu belirlenmiştir. Öğrencilerin kültürel öğelere karşı tutumlarının yeterli düzeyde olmadığı sonucuna ulaşılmıştır. Bu sonuçlar neticesinde, kültürel öğelerin aktarımında müzik dersi ve öğretim programına ilişkin önerilerde bulunulmuştur.
LATİFE TEKİN'İN ORMANDA ÖLÜM YOKMUŞ ROMANININ ARKETİPLER AÇISINDAN İNCELENMESİ
Authors: SÖNMEZ Fatma
Published: March 2023

C. G. Jung’un ortaya attığı ve kolektif bilinçdışına ait olduğunu belirttiği arketipler, tüm insanlığın zihninde, rüyasında, edebi eserlerinde, kültürlerinde vb. devam edegelen ortak sembollerdir. Jung, kolektif bilinçdışında belirgin olan bazı arketiplerden bahseder. Bunlar gölge, anima, animus, ben, yaşlı bilge adam, anne, çocuk ve hayvan arketipleridir. J. Campbell buna kahraman arketipini (monomit) de ekler. Campbell’in monomit adını verdiği kahraman arketipi aşama arketipi olarak da adlandırılır. Monomit; yola çıkış, erginlenme ve dönüş adı verilen üç aşamalı bir serüven yaşadıktan sonra başladığı yere geri döner. Elbette bu yolculuğun sonunda, döndüğünde, aynı kişi olarak kalması beklenemez. Bu çalışmada Latife Tekin’in Ormanda Ölüm Yokmuş romanı Jung’un ve Campbell’in önemle üzerinde durdukları bu arketipler açısından değerlendirilmiştir. Buna göre başkahraman olan Emin, modern bir monomittir; aşk acısından ve dolayısıyla ölümden kaçmak için yola çıkar. Ormanda kendisinin genç haliyle karşılaştıktan sonra erginlenir, ormandan kente dönüşüyle birlikte evde biriktirdiği tüm yaprakları ve taşları bir sandığa kaldırarak dönüşünü tamamlar. Romanda orman anne arketipidir, arkadaşı Yasemin seven anne ve eski eşi Gölge ise korkutucu anne arketipidir. Emin’in köpeği Yaşar gölge arketipidir ve kendisinden daha yaşlı olan arkadaşı Yurt ise yaşlı bilge arketipidir. Emin’in sevdiği kadın Zümrüt ve eski eşi Gölge, anima arketipidirler. Emin’in ormanda karşılaştığı ve aslında kendisinin genç hali olan adam, ben arketipidir. Romanda ayrıca ağaç arketiplerine, üç sayısı arketipine, güneş ve ışık arketiplerine, yeniden doğuş arketipine ve hayvan arketiplerine de yer verilmiştir. Romanın tüm bu açılardan bakıldığında sembolik bir dili olduğu görülür. Tekin’in bu kolektif sembolleri, rüya ve gerçek arasındaki gelgitli ruh haline uygun bir dille vermesi romanın klişe kurgudan uzaklaşmasına ve kendine has bir yapıya sahip olmasına neden olmuştur diyebiliriz.
Screening algorithms for detecting dysphagia: A validation study of Thai EAT-10 combined with the 3-Ounce Water Swallow Test
Authors:   Department of Family and Community Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai Province, Thailand., Kongma Pilaiwan , Korwanich Narumanas ,   Department of Family and Community Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai Province, Thailand., Klibngern Hanpon ,   Department of Otolaryngology, Faculty of Medicine, Chiang Mai University, Chiang Mai Province, Thailand., Tavisak Natchaiyant ,   Department of Otolaryngology, Faculty of Medicine, Chiang Mai University, Chiang Mai Province, Thailand., Inoue Makoto ,   Division of Dysphagia Rehabilitation, Niigata University, Japan., Korwanich Kanyarat ,   Department of Family and Community Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai Province, Thailand.
Published: March 2023

Background: Dysphagia assessment using standard tools is not commonly performed in Thailand because it relies on equipment and experts to evaluate. This study was conducted by combining the Thai EAT-10 and the 3-ounce water swallow test, an easy-to-use tool for dysphagia screening. Therefore, it is crucial to study the accuracy and appropriateness before being widely used in the Thai population. Objectives: To evaluate the validity of the combined Thai Eating Assessment Tool 10 (Thai EAT-10) and the 3-ounce Water Swallow Test (WST) screening algorithm for detecting dysphagia compared to diagnosis by an otolaryngologist. Materials and methods: Analytical Cross-sectional study: sample of 260 adults (aged 20 years old or older) demographic data and past medical history were assessed using a questionnaire. The accuracy of dysphagia screening tests that combine Thai EAT-10 and the 3-ounce water swallow test with pulse oximetry was compared to the clinical swallow test assessed by an otolaryngologist. The sensitivity and specificity of the swallowing screening test for detecting dysphagia were evaluated. Results: Thai EAT-10 combined with the 3-ounce Water Swallow Test has higher validity and accuracy for dysphagia evaluation than those of the Thai EAT-10 or the 3-ounce Water Swallow Test alone. There was 100% sensitivity, 93.4% specificity, 68.1% positive predictive value (PPV), and 100% negative predictive value (NPV). Conclusion: The Thai EAT-10 combined with the 3-ounce water swallow test and pulse oximetry has higher reliability and validity than those of the Thai EAT-10 and the 3-ounce water swallow test alone. The reliability and validity of the combined test is closed to the gold standard. Furthermore, the algorithm is appropriate for screening dysphagia in remote areas with a large population.
WSN Network Node Malicious Intrusion Detection Method Based on Reputation Score
Authors: Zhang Junlin
Published: March 2023

Wireless sensor network (WSN) is the Internet of Things by a large number of sensors in the external physical environment to obtain data information, and use wireless communication technology to provide users with information transmission services. At this stage, communication and security mechanisms are the main problems faced by WSN. This is because most of the existing sensors are powered by batteries with very limited energy, and most of them are deployed in an outdoor open environment, which is easy to be captured as a malicious node. Network attacks. However, the existing malicious node detection methods have shortcomings such as low efficiency, high energy consumption, and insufficient performance. Therefore, this paper proposes a WSN malicious node intrusion detection method based on genetic algorithm optimization of LEACH hierarchical routing protocol. Based on the optimization of the LEACH protocol by genetic algorithm, the method integrates the reputation evaluation mechanism, and screens and eliminates malicious nodes by calculating direct reputation, indirect reputation and comprehensive reputation, thereby ensuring the safe operation of WSN. The simulation results show that this method can effectively resist the attack of malicious nodes on WSN, and has obvious advantages over other methods.
Association between interleukin-2 (rs2069762) gene polymorphism and FVIII inhibitor development in Indonesian patients with severe hemophilia A
Authors: Marwanta Sri , Muhammad Faizal , Maryono Suradi , Salimah Kun , Sudarmadi Sihwidhi Dimas , Purwanto Bambang , Wasita Brian , Ardyanto Tonang Dwi , Soetrisno
Published: March 2023

BACKGROUND Factor VIII (FVIII) inhibitors in hemophilia A (HA) patients render FVIII replacement therapy ineffective. Although its development cause is unclear, it has been classified into therapeutic and genetic-related etiologies. Single nucleotide polymorphisms (SNPs) in several cytokine genes, including interleukin (IL)-2, could increase the risk of FVIII inhibitor development. This study aimed to evaluate the association between IL-2 (rs2069762) gene SNP and FVIII inhibitor development in Indonesian patients with severe HA.

METHODS The IL-2 (rs2069762) gene SNP was examined in 119 HA patients. The presence of FVIII inhibitors was quantified using an enzyme-linked immunosorbent assay, with a titer of <0.28 ng/ml considered negative. Patients were divided into two groups: 59 with FVIII inhibitors (positive group) and 60 without inhibitors (negative group). The genotype of the subjects was determined using peripheral blood mononuclear cells and tetra-primer amplification refractory mutation system-polymerase chain reaction.

RESULTS There was no association between IL-2 (rs2069762) gene polymorphism and FVIII inhibitor development on genotypes (p = 0.138) and allele frequencies (p = 0.780).

CONCLUSIONS IL-2 (rs2069762) gene polymorphism is not a risk factor in the development of FVIII inhibitors in Indonesian patients with severe HA. Thus, further polymorphism studies in other cytokine genes are required to gain a comprehensive understanding of the FVIII inhibitor development.
Men’s efforts to tackle men’s violence: negotiating gendered privileges and norms in movement and practice spaces
Authors: Wild Jessica
Published: March 2023

The involvement of men in efforts to challenge men’s violence is a crucial component for eradicating gender-based violence (GBV) and for disrupting the continued responsibilisation of women and survivors for addressing the problem at various scales. But as men’s participation in the field has evolved and become increasingly professionalised, so tensions have emerged regarding what happens when men enter women-majority professional and movement anti-violence spaces. Via a feminist discourse analysis, this article explores how men active in the violence against women and girls (VAWG) sector and movement conceptualise and negotiate the challenges associated with the reproduction of patriarchal privilege in the context of their work or activism. Analysis points to how gender inequalities and masculine norms are both instrumentalised as well as entrenched, even when men ‘allies’ seek to challenge them. Moreover, findings indicate how men’s often elevated status in anti-violence practice and movement spaces can be used to resource a type of ‘entrepreneurial masculinity’ which obstructs structural change as regards gendered norms and expectations. This article offers an empirical and theoretical contribution to the expanding literature on men’s role(s) in the prevention of men’s violence against women and minoritised genders, and the ways in which gendered privilege operates therein.
Spectral Narrowing and Broadening of Cr:ZnS/Se Laser Oscillation Due to Mode Competition and Spatial Hole Burning In the Gain Element
Authors: Danilin Rem , Fedorov Vladimir , Martyshkin Dmitry , Mirov Sergey
Published: March 2023

It was demonstrated that in the nonselective cavities, suppression of the spatial hole burning via "mode twisting" for lasers based on polycrystalline Cr:ZnS and Cr:ZnSe results in linewidth narrowing to ~80-90 pm from ~20-50 nm.
Table-top optical parametric chirped-pulse amplifiers: three decades of advances
Authors: Dubietis Audrius
Published: March 2023

This Contribution gives an overview on the development and current state of the art of table-top optical parametric chirped pulse amplifiers, addressing their performance characteristics, design concepts and relevant scientific and technological aspects.
LWIR OPCPA at 11.4 µm delivering 65 µJ femtosecond pulses at 1 kHz repetition rate
Authors: Fürtjes Pia Johanna , Bock Martin , von Grafenstein Lorenz , Ueberschaer Dennis , Griebner Uwe , Elsaesser Thomas
Published: March 2023

We present a 3-stage GaSe optical parametric amplifier based on a fs Cr:ZnS front–end generating idler pulses around 12 µm with sub-200 fs duration and energy of 65 µJ at a 1-kHz repetition rate.
3 TW single-cycle pulses from a thin plate post-compressed OPCPA system
Authors: Nagymihály Roland S. , Tóth Szabolcs , Seres Imre , Lehotai Levente , Csontos János , Pajer Viktor , Farkas Arnold , Mohácsi Árpád , Börzsönyi Ádám , Osvay Károly
Published: March 2023

High quality 12 mJ pulses with 3.8 fs duration were produced by using the thin plate post- compression technique with 12 fs driver pulses from a 10 Hz OPCPA system operating at 820 nm central wavelength.
A cryogenic Yb:YAG regenerative amplifier pumped, mJ-class, 1 kHz, 3 µm wavelength ultrafast OPCPA
Authors: Morrill Drew , Carlson Daniel , Hettel Will , Lesko Daniel , Wu Tsung-Han , Diddams Scott , Murnane Margaret , Kapteyn Henry , Hemmer Michael
Published: March 2023

We report a robust long-term stable >19mJ energy, 1kHz repetition rate cryogenic Yb:YAG regenerative amplifier and its application in pumping a mJ-class, 3µm wavelength OPCPA. We highlight the benefits of cryo-Yb:YAG over alternative systems.
Recent progress on large aperture LBO and RTP optics for efficient harmonics generation and high power lasers
Authors: Balitski D.V. , Villeval Ph. , Lupinski D.
Published: March 2023

Cristal Laser started production of 7kg LBO and 1.2kg RTP boules of high structural/optical homogeneity and laser damage resistance. LBO is suitable for ns/ps/fs high energy lasers, RTP electro-optic devices are suitable for fast switching.
High-power optical vortex beams with sub 500 fs pulse duration at wavelengths of 1030 nm and 515 nm
Authors: Loescher André , Röcker Christoph , Bienert Florian , Graf Thomas , Ahmed Marwan Abdou
Published: March 2023

We report on the generation of vortex beams at 1030 nm and 515 nm. 802 W and 320 W were achieved at a repetition rate of 1 MHz and pulse durations below 500 fs.
Modelling of thermal stress-induced depolarisation in a 10 J, 100 Hz diode-pumped Yb:YAG laser
Authors: Quinn Gary , De Vido Mariastefania , Ertel Klaus , Clarke Danielle
Published: March 2023

We present an overview and the results of thermal stress-induced depolarisation modelling of Yb:YAG gain media slabs in a multipass, cryogenically-cooled, nanosecond, diode-pumped solid state laser operating at 10 J, 100 Hz.
Thermal Effects Reduction in a Diode-Pumped Bonded α- Quartz||Nd:Glass||α-Quartz Laser Gain Medium: Comparison Between Two Bonding Methods
Authors: Dubé Thomas , Lupinski Dominique , Camy Patrice , Montant Sébastien
Published: March 2023

In the present work, we numerically and experimentally compare the thermally-induced wavefront aberrations and birefringence of two bonded samples. These samples are made of Nd- doped laser glass and quartz crystals using two distinct bonding methods.
Fabrication and Laser Characterization of Glass-clad Single-crystalline-core Fibers
Authors: Yang Teng-I , Yu Ya-Chun , Lin Yu-Chan , Huang Sheng-Lung
Published: March 2023

Glass-clad Ti:sapphire-core fibers have been used in cellular-resolution optical coherence tomography and greater than 240-nm swept laser sources in the near-infrared wavelength range. The development of Ti:sapphire-core fibers toward single-mode transmission is addressed.
Design and Optimization of a High-Energy Optical Parametric Amplifier for Broadband, Spectrally Incoherent Pulses
Authors: Ekanayake N. , Spilatro M. , Bolognesi A. , Herman S. , Sampat S. , Hill E. M. , Dorrer C.
Published: March 2023

We demonstrate and optimize a high-energy laser amplifier for broadband, spectrally incoherent pulses based on optical parametric amplification, reaching pulse energies close to 400 mJ in the near infrared.
300 mJ Electro-Optically Q-switched 2.79 μm Cr:Er:YSGG Laser
Authors: Martyshkin D. , Fedorov V. , Hamlin S. J. , Mirov S.
Published: March 2023

We report on a 2.79 μm flashlamp pumped electro-optically Q-switched Cr:Er:YSGG laser. The maximum output energy of 300mJ was demonstrated in 15 ns pulses at a 3 Hz repetition rate.
Sub-50 fs Diode-Pumped Mode-Locked Yb:SrF2 Laser
Authors: Xue Wen-Ze , Lin Zhang-Lang , Zeng Huang-Jun , Zhang Ge , Loiko Pavel , Benayad Abdelmjid , Braud Alain , Camy Patrice , Mateos Xavier , Petrov Valentin , Wang Li , Chen Weidong
Published: March 2023

We report on a diode-pumped SESAM mode-locked Yb:SrF2 laser generating 49 fs pulses at 1058 nm with an average output power of 117 mW at a pulse repetition rate of ~75.9 MHz.
Tm:Y2O3 ceramic laser mode-locked with SESAM
Authors: Zhang Ning , Liu Shande , Wang Zhanxin , Liu Jian , Xu Xiaodong , Xu Jun , Wang Jun , Liu Peng , Ma Jie , Shen Deyuan , Tang Dingyuan , Lin Hui , Zhang Jian , Chen Weidong , Zhao Yongguang , Griebner Uwe , Petrov Valentin
Published: March 2023

The generation of Fourier-transform-limited pulses as short as 75 fs at ~2.06 μm for an average output power of 0.26 W at 86.3-MHz repetition rate is demonstrated with a SESAM mode-locked Tm:Y2O3 ceramic laser.
Kerr-Lens-Modelocked 1-GHz Ti:sapphire Oscillator Pumped by a Single Laser Diode
Authors: Ostapenko Hanna , Mitchell Toby , Castro-Marin Pablo , Reid Derryck T.
Published: March 2023

We present a self-starting Kerr-lens-modelocked, three-element, single-diode-pumped Ti:sapphire laser producing 111-fs pulses at a repetition frequency of 1 GHz with an average power of 106 mW at 1 W of pump power.
Transparent Ceramic Yb:YAG Gain Medium for High-Energy Lasers: Process Optimisation Through the Use of Sintering Aids
Authors: Hostaša Jan , De Vido Mariastefania , Piancastelli Andreana , Clarke Danielle , Quinn Gary , Biasini Valentina , Esposito Laura , Mason Paul D.
Published: March 2023

Ceramic Yb:YAG is a suitable gain medium candidate for high-energy lasers. The use of a combination of TEOS and MgO sintering aids led to uniform microstructure independently on the increase of thickness. Samples were thoroughly characterised.
Effect of ZnS Shell Thickness in InP Quantum Dots for Photo-acoustic Wave Generation
Authors: Cizmeciyan M. Natali , Eren Guncem Ozgun , Khoshzaban Alireza , Nizamoglu Sedat , Unlu Mehmet Burcin
Published: March 2023

Photo-acoustic spectroscopy technique showed that increasing the ZnS thick- ness from one to five layers and decreasing PLQY from 30% to 9% did not influence the amplitude of emitted acoustic waves for InP/ZnS QDs.
Theoretical Investigation into Backscattering in Optical Fiber Cladding Light Stripper
Authors: Kim Taeyoon , Jung Junha , Lee Kyungtaek , Lee Ju Han
Published: March 2023

The relationship between the roughness of the cladding surface and the backscattering for periodically grooved CLSs was investigated. The use of unetched sections is shown to be beneficial to efficient suppression of detrimental backscattering.
Beam-splitter-type Waveguide Laser for Controllable Single- and Dual-channel Q-switching
Authors: Bae Ji Eun , Calmano Thomas , Kränkel Christian , Rotermund Fabian
Published: March 2023

Controllable graphene Q-switching in an Yb:YAG fs-laser-written beam-splitter-type waveguide laser is demonstrated by tunable beam-splitting ratio and varying pump power. Desired channels are regulated to generate Q-switched pulses separately or simultaneously with a single pumping.
Out-of-plane beam displacements of radio waves due to ionosphere
Authors: Simon Niña Zambale , Hermosa Nathaniel
Published: March 2023

We calculate the out-of-plane Imbert-Fedorov (IF) shifts of radio waves reflected from the ionosphere. From our calculations, we present the use of IF shifts as potential tool to probe the properties of the ionosphere.
Power Scaling of Widely Tunable, Narrow-linewidth (<0.3 nm) Mid-infrared Lasers Based on a Hybrid QCL/Fe:ZnSe Amplifier
Authors: Li Enhao , Uehara Hiyori , Tokita Shigeki , Yasuhara Ryo
Published: March 2023

We present a hybrid QCL/Fe:ZnSe amplifier for power scaling of a widely tunable, narrow-linewidth laser source at 3.8–4.1 μm. Additionally, single-frequency laser amplification with more than 210-mW output power using Fe:ZnSe is demonstrated.
Light Combining and Coherent analyses through Self-Written Waveguides
Authors: Cassidy Derek J , Sheridan John
Published: March 2023

Self-written waveguides are created within photopolymer material at 532nm. A second light beam at 625nm is combined with the original beam and propagated along the SWW and coherence is again measured asl well optical characteristics.
Synthesis and characterization of Graphite Oxide from Graphite using Nano second pulsed laser ablation in liquid
Authors: Rohini Puliyasseri , Sastikumar Dillibabu
Published: March 2023

Graphite oxide is prepared by laser ablation of Graphene in ethanol. FT-IR, Raman, TEM, and PL analysis have done. UV spectra shows π–π* transition of C=C and n–π* transition of C=O.
High-Performance Computational Approach for Inverse Design of Passive Photonic Components
Authors: Minin Iurii , Matveev Sergey
Published: March 2023

We propose novel approach for high-performance computations of electric field distributions which uses Green’s Function Integral Equation Method, memcopy-free GMRES, fast (FFT-based) matvecs and can work 10 times faster for optimizing topologies than Synopsys FullWave.
Optimal Pump and Dispersion Conditions For Soliton Microcomb Generation
Authors: Kondratiev Nikita M. , Lobanov Valery E. , Dmitriev Nikita Yu. , Cordette Steevy J. , Bilenko Igor A.
Published: March 2023

Dissipative Kerr solitons generated in high-Q optical microresonators provide unique opportunities for different up-to-date applications. Increasing the generation efficiency of such signals is a problem of paramount importance. We provided comprehensive analysis and found optimal conditions providing maximal pump-to-comb conversion efficiency (up to 100%) for the cases of a free-running and self-injection-locked pump lasers. The dependence of the optimal coupling rate on the pump power was revealed, in addition to the trade-off relations balancing the efficiency versus the number of comb line. The methods to increase the total comb power were also discussed.
Development and Control of Fast Deformable Mirrors using the Influence Function Approach
Authors: Chosrowjan Haik , Taniguchi Seiji , Fujita Masayuki , Tsukihana Tomohiro , Sakaki Naoto , Ebisuzaki Toshikazu , Iwashimizu Masashi , Noritake Takuya , Nishikata Shingo , Daigo Hiroyuki
Published: March 2023

Development, characterization, and control of large diameter (10-cm) deformable mirrors for multi kW-class CW lasers, capable of operating at a 10-kHz sampling rate, have been described, and their operation has been verified experimentally.
Passive Fiber with Pedestal in a 213-W Continuous Wave Monolithic Tm3+-Doped Fiber Laser at 1.94 µm
Authors: Louot Christophe , Motard Arnaud , Ibach Thierry , Robin Thierry , Cadier Benoit , Dalloz Nicolas , Hildenbrand-Dhollande Anne
Published: March 2023

The output of a 43%-efficient continuous-wave monolithic single-oscillator Tm3+-doped fiber laser emitting 213 W at 1.94 µm is made by a passive fiber with pedestal to improve its beam quality by reducing the pedestal-to-cladding coupling.
SWIR Wavefront Sensing and control for Satellite Communications
Authors: Porcar Rafael , Dovillaire Guillaume , Colas François
Published: March 2023

Imagine Optic introduces a simple and effective adaptive optics solution to correct for static aberrations of ground telescopes and dynamic aberrations induced by atmosphere turbulences. Latest results are presented.
Compensation of polarization in non-planar image-rotating OPO ring resonators
Authors: Piotrowski Marcin , Schellhorn Martin , Spindler Gerhard , Medina Manuel , Mueller Christian , Bigotta Stefano , Hildenbrand-Dhollande Anne
Published: March 2023

We analyze theoretically and experimentally the performance of an OPO device with ZGP crystals in two types of nonplanar resonators that are of particular interest for ns-pulsed sources of high-power or high-energy mid-IR radiation.
High-Temperature Onboard Laser for Well Logging
Authors: Andrews A. Ballard , Speck Andrew J.
Published: March 2023

A high-temperature, high-energy onboard laser that can withstand shock and vibration and Raman spectrometer has been developed for gas composition analysis in wells which intersect more than one producing zone.
Experimental implementation of a quantum Differential Interference Constrast (DIC) microscope
Authors: Urrego Daniel F. , Passos M. H. M. , Torres Juan P.
Published: March 2023

We demonstrate experimentally a quantum version of Differential Interference Contrast (DIC) microscopy that makes use of the Hong-Ou-Mandel effect for phase retrieval. Contrary to other methods that use the HOM effect for imaging, our scheme does not require either the use of a reference photon with a well characterized spatial shape, neither numerical processing of the signal measured. The method can generate images of samples with subwavelength thickness, and these images can be obtained from experimental data in a straightforward manner.
Compact breast shape acquisition system for improving diffuse optical tomography image reconstructions
Authors: Vanegas Morris , Mireles Miguel , Xu Edward , Yan Shijie , Fang Qianqian
Published: March 2023

Diffuse optical tomography (DOT) has been investigated for diagnosing malignant breast lesions, but its accuracy relies on model-based image reconstructions, which in turn depends on the accuracy of breast shape acquisition. In this work, we have developed a dual-camera structured light imaging (SLI) breast shape acquisition system tailored for a mammography-like compression setting. Illumination pattern intensity is dynamically adjusted to account for skin tone differences, while thickness-informed pattern masking reduces artifacts due to specular reflections. This compact system is affixed to a rigid mount that can be installed into existing mammography or parallel-plate DOT systems without the need for camera-projector re-calibration. Our SLI system produces sub-millimeter resolution with a mean surface error of 0.26 mm. This breast shape acquisition system results in more accurate surface recovery, with an average 1.6-fold reduction in surface estimation errors over a reference method via contour extrusion. Such improvement translates to 25% to 50% reduction in mean squared error in the recovered absorption coefficient for a series of simulated tumors 1-2 cm below the skin.
Design of a switchable bifunctional terahertz metamaterial absorber from ultra-broadband to 10-band
Authors: Qi Yunping , Wang Li , Wen Yujiao , Chen Haowen , Yuan Yujiao , Zhou Zihao , Zhao Shiyu , Wang Xiangxian
Published: March 2023

A bifunctional absorber with hybrid graphene–vanadium dioxide (VO2) is proposed and numerically investigated in the paper. Simulation results indicate that the absorber behaves as a broadband absorber with absorptance of more than 90% from 3.15 THz to 8.45 THz, when VO2 is in the metallic state. When VO2 is in the insulating state, the design exhibits a 10-band absorber, whose peak absorptances are above 90%. Broadband absorption is investigated by the impedance matching theory, and detailed physical studies indicate that it arises from electromagnetic resonance based on VO2 patches. Ten-band absorption originates from graphene plasmon (GP) resonance and Fabry–Perot cavity resonance. By adjusting the conductivity of VO2 and the Fermi level of graphene, the designed absorber not only can be independently tuned, but also has 91.9% modulation depth under broadband absorptance. Furthermore, the effect of incident angle on absorptance is investigated, and the absorber is polarization insensitive due to the symmetry of the structure. Benefiting from the above excellent performance, the bifunctional absorber offers great potential in terahertz applications, such as modulating, switching, and electromagnetic energy harvesting.
Theoretical analysis of self-phase-modulation-enabled spectral selection in hollow-core fibers: effect of ionization
Authors: Shi Zhuo , Chen Runzhi , Chang Guoqing
Published: March 2023

We propose the generation of wavelength-tunable femtosecond pulses with µJ energy based on spectral broadening in hollow-core fibers (HCFs) filled with noble gas. A proper combination of gas type, gas pressure, and the HCF core radius ensures that the broadened spectrum consists of isolated spectral lobes; the selection of the outermost spectral lobes produces nearly transform-limited pulses. We performed a detailed numerical investigation of this method based on an antiresonant HCF with a 20 µm core radius filled with 17.3 bar Xe gas. By using 1.03 µm, 200 fs pulses with up to 20 µJ energy as the excitation pulse, this method can produce 100 fs pulses tuned from 0.74 to 1.25 µm with up to 5 µJ pulse energy. Further energy scaling is limited by the onset of ionization, which reduces the wavelength tuning range and causes a significant spectral blue shift. Increasing the input pulse energy beyond 45 µJ creates a strong spectral lobe peaking in the wavelength range of 0.92–0.95 µm with >10µJ energy. These results represent a two orders of magnitude improvement in the pulse energy compared to current tunable femtosecond sources based on nonlinear wavelength conversion in solid-core optical fibers.
32.5 mJ high peak power kHz-level 1617/1645 nm Er:YAG lasers
Authors: Smolski Viktor , Moskalev Igor , Vasilyev Sergey , Mirov Mike , Mirov Sergey
Published: March 2023

We present recent results on high energy, high repetition rate 1645 nm Er:YAG laser optically pumped by efficient Er-doped CW fiber lasers. Up to 32.5 mJ pulse energy, 0.85 MW-level peak powers are obtained at 1000 Hz. The results are presented in a wide 500-5000 Hz range of repetition rates.
Vibration-Induced Linewidth Broadening in Long Range FMCW Lidar
Authors: Dostart Nathan , Gragossian Aram , Amzajerdian Farzin , Hines Glenn , Proctor Lance , Barnes Bruce , Ehlertani Randa , Pierrottet Diego
Published: March 2023

We analyze performance changes on a NASA-developed lidar system resulting from vibration loads expected during spacecraft landing. Vibration-induced laser linewidth broadening and reduced measurement precision are demonstrated and related to vibration level and target range.
Navigation Doppler Lidar for Lunar Landers
Authors: Gragossian Aram , Barnes Bruce , Heppler Jacob , Follman Jacob , Dostart Nathan , Amundsen Ruth , Ben Shabat Adam , Hines Glenn , Amzajerdian Farzin
Published: March 2023

The new generation of Navigation Doppler Lidar has been designed, developed, and tested for lunar missions. Comprehensive environmental testing is performed to assess the performance of the instrument for upcoming lunar missions and future missions to the Moon and other planetary bodies.
Laser Doppler Multi-Beam Differential Vibration Sensor for Real-time Continuous Visualization of Buried Objects in Multiple Frequency Bands
Authors: Aranchuk V. , Johnson S. , Aranchuk I. , Hickey C.
Published: March 2023

A Laser Doppler multi-beam differential vibration sensor capable of simultaneous real-time vibration imaging of objects in multiple frequency bands has been developed. The application of the sensor for real-time detection of buried objects has been demonstrated. ©2022 The Authors.
Self-injection locking of a Fabry-Pérot laser diode in gain-switched regime for visible range
Authors: Shitikov Artem E. , Min’kov Kirill N. , Galiev Ramzil R. , Kondratyev Nikita M. , Cordette Steevy J. , Lobanov Valery E. , Bilenko Igor A.
Published: March 2023

We demonstrate microresonator-stabilized Fabry-Pérot laser diode with 10 Hz instantaneous linewidth at 638 nm. Using gain-switching regime we demonstrate tunable frequency comb with line spacing from 10 MHz to 2 GHz.
Measurement of the Statistical Distribution of Laser Speckle
Authors: Barnes Wesley M. , Spencer Mark F.
Published: March 2023

Generating well-developed laser speckle in the laboratory is an important first step in studying its effects on adaptive optics or tracking performance. As such, we discuss the measurement techniques used to measure the statistical distribution of laser speckle generated from a holographic diffuser, as well as the speckle contrast.
Increasing lateral resolution of 3D LiDAR GmAPD using Compressive Sensing
Authors: Erwan Viala , Paul-Édouard Dupouy , Nicolas Riviere , Laurent Risser
Published: March 2023

In this paper we present an algorithm for 3D scene reconstruction suitable for Geiger-mode Array Photodiode 3D focal-plane. This method use Compressive Sensing to increase lateral-resolution of each GmAPD’s pixel after signal-processing reconstruction.
Tunable metasurface for independent controlling radar stealth properties via geometric and propagation phase modulation
Authors: Ma Haoran , Yang Jiaji , Chen Tianting , Duan Jun , Liu Yi , Yang Shaorui , Liu Le , Gong Rongzhou , Deng Leimin
Published: March 2023

Metasurfaces have been verified as an ideal way to control electromagnetic waves within an optically thin interface. In this paper, a design method of a tunable metasurface integrated with vanadium dioxide (VO2) is proposed to realize independent control of geometric and propagation phase modulation. The reversible conversion of VO2 between insulator phase and metal phase can be realized by controlling the ambient temperature, which enables the metasurface to be switched quickly between split-ring and double-ring structures. The phase characteristics of 2-bit coding units and the electromagnetic scattering characteristics of arrays composed of different arrangements are analyzed in detail, which confirms the independence of geometric and propagation phase modulation in the tunable metasurface. The experimental results demonstrate that the fabricated regular array and random array samples have different broadband low reflection frequency bands before and after the phase transition of VO2, and the 10 dB reflectivity reduction bands can be switched quickly between C/X and Ku bands, which are in good agreement with the numerical simulation. This method realizes the switching function of metasurface modulation mode by controlling the ambient temperature, which provides a flexible and feasible idea for the design and fabrication of stealth metasurfaces.
Wafer-scale heterogeneous integration of thin film lithium niobate on silicon-nitride photonic integrated circuits with low loss bonding interfaces
Authors: Ghosh Siddhartha , Yegnanarayanan Siva , Kharas Dave , Ricci Matthew , Plant Jason J. , Juodawlkis Paul W.
Published: March 2023

Silicon nitride (Si3N4) is a versatile waveguide material platform for CMOS foundry-based photonic integrated circuits (PICs) with low loss and high-power handling. The range of applications enabled by this platform is significantly expanded with the addition of a material with large electro-optic and nonlinear coefficients such as lithium niobate. This work examines the heterogeneous integration of thin-film lithium-niobate (TFLN) on silicon-nitride PICs. Bonding approaches are evaluated based on the interface used (SiO2, Al2O3 and direct) to form hybrid waveguide structures. We demonstrate low losses in chip-scale bonded ring resonators of 0.4 dB/cm (intrinsic Q = 8.19 × 105). In addition, we are able to scale the process to demonstrate bonding of full 100-mm TFLN wafers to 200-mm Si3N4 PIC wafers with high layer transfer yield. This will enable future integration with foundry processing and process design kits (PDKs) for applications such as integrated microwave photonics and quantum photonics.
Hybrid metasurface using graphene/graphitic carbon nitride heterojunctions for ultrasensitive terahertz biosensors with tunable energy band structure
Authors: Yao Haiyun , Sun Zhaoqing , Liang Lanju , Yan Xin , Wang Yaru , Yang Maosheng , Hu Xiaofei , Wang Ziqun , Li Zhenhua , Wang Meng , Huang Chuanxin , Yang Qili , Tian Zhongjun , Yao Jianquan
Published: March 2023

Integrating novel materials is critical for the ultrasensitive, multi-dimensional detection of biomolecules in the terahertz (THz) range. Few studies on THz biosensors have used semiconductive active layers with tunable energy band structures. In this study, we demonstrate three THz biosensors for detecting casein molecules based on the hybridization of the metasurface with graphitic carbon nitride, graphene, and heterojunction. We achieved low-concentration detection of casein molecules with a 3.54 ng/mL limit and multi-dimensional sensing by observing three degrees of variations (frequency shift, transmission difference, and phase difference). The favorable effect of casein on the conductivity of the semiconductive active layer can be used to explain the internal sensing mechanism. The incorporation of protein molecules changes the carrier concentration on the surface of the semiconductor active layer via the electrostatic doping effect as the concentration of positively charged casein grows, which alters the energy band structure and the conductivity of the active layer. The measured results indicate that any casein concentration can be distinguished directly by observing variations in resonance frequency, transmission value, and phase difference. With the heterojunction, the biosensor showed the highest response to the protein among the three biosensors. The Silvaco Atlas package was used to simulate the three samples’ energy band structure and carrier transport to demonstrate the benefits of the heterojunction for the sensor. The simulation results validated our proposed theoretical mechanism model. Our proposed biosensors could provide a novel approach for THz metasurface-based ultrasensitive biosensing technologies.