Search query: Mach Zhender Electro Optical Modulator

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abstract: Recently, there is increasing interest in high spectral efficiency (SE) optical superchannel transmission employing an optical frequency comb generator (OFCG) driven by a single semiconductor laser. This paper introduces a new configuration for OFCG suitable for this application which consists of series connection of a dual parallel Mach Zhender modulator (DP MZM) and two electro absorption modulators (EAMs) The proposed configuration is able to generate 62 comb lines, within 1 dB flatness, separated by 25 GHz spacing. The use of the proposed comb in 64 channel WDM superchannel operating with 160Gbps dual polarization 16 QAM signal per comb line is demonstrated by simulation over around 500 km transmission. The simulation is based on a commercial package, namely Optisystem ver. 15.
author_names: Adnan Ali Abdullah

Raad S Fyath
title: High Spectral Efficiency Transmission Based on New Design of Optical Frequency Comb Generato
venue: 2020 International Conference on Computer Science and Software Engineering (CSASE)
year: 2020

abstract: A model is created to study the role of impedance matching in indium phosphide modulators. The frequencydependent characteristic impedance and propagation constant of the electrical transmission line structure is calculated from the cross section of the phase modulator, electrode geometry, and p i n junction. The impedance and propagation constant are used in combination with a closed form approximation for the traveling wave electrode and electrical circuit to create the non iterative compact model. It yields good agreement with the experiment in a 50 Ohm measurement environment and the effect of changing source and termination impedance has been modeled. The 3dB optical modulation bandwidth is predicted to increase from 30GHz to 60GHz with optimized impedance matching and the associated suppression of electrical reflections.
author_names: A Meighan
title: Microwave model for optimizing electro optical modulation response of the Mach Zehnder modulator
year: 2020

abstract: A low voltage operation electro optic modulator is critical for applications ranging from optical communications to an analog photonic link. This paper reports a hybrid silicon nitride and lithium niobate electro optic Mach Zehnder modulator that employs 3 dB multimode interference couplers for splitting and combining light. The presented amplitude modulator with an interaction region length of 2.4 cm demonstrates a DC half wave voltage of only 0.875 V, which corresponds to a modulation efficiency per unit length of 2.11 V cm. The power extinction ratio of the fabricated device is approximately 30 dB, and the on chip optical loss is about 5.4 dB.
author_names: Abu Naim Rakib Ahmed

Sean Nelan

Shouyuan Shi

Peng Yao

Andrew J Mercante

Dennis W Prather
title: Subvolt electro optical modulator on thin film lithium niobate and silicon nitride hybrid platform.
venue: Optics letters
year: 2020

abstract: Optical frequency combs (OFCs) are involved in a large diversity of applications such as metrology, telecommunication or spectroscopy. Different techniques have been explored during the last years for their generation. Using an electrooptical modulator (EOM) it is possible to generate a fully tunable OFC for which the optical repetition rate is set by the frequency of the applied electrical radio frequency (RF) signal. In order to realize on chip OFC generators, silicon photonics is a well suited technology, benefiting from large scale fabrication facilities and the possibility to integrate the electronics with the EOM. However, observing OFCs with a repetition rate lower than 10 GHz can be challenging since such spacings are smaller than the typical resolution of grating based optical spectrum analyzers. To overcome this issue, two alternative solutions based on heterodyne detection techniques are used to image the OFC on the electrical RF domain. The first technique consists in applying two frequencies close to each other simultaneously on the modulator, and observing the beating between the resulting two combs. Another method consists in observing the beating between the OFC and the input laser, once the frequency of this input laser has been shifted from the center of the OFC by means of an acousto optic modulator. Based on both measurement techniques, OFCs containing more than 10 lines spaced with repetition rates from 100 MHz to 15 GHz have been observed. They are generated using a 4 mm long silicon depletionbased traveling wave Mach Zehnder modulator (MZM) operating at a wavelength of 1550 nm.
author_names: Lucas Deniel

Erwan Weckenmann

Diego Perez-Galacho

Laurent Bramerie

Charles Baudot

Margaux Barbier

Mathilde Gay

Frederic Boeuf

Laurent Vivien

Christophe Peucheret

Delphine Marris-Morini
title: Heterodyne detection for the measurement of electro optical frequency combs generated with a silicon Mach Zehnder modulator
venue: OPTO
year: 2020

abstract: This paper propose electric optical modulator model and establish a simulation link. Combined with the simulation link at 25 Gbps transmission rate, the extinction ratio(ER) optical modulation amplitude(OMA) and bit error rate(BER) of the modulator are studied when the arm length of the modulator is between 1mm and 3mm, and the peak to peak voltage (VPP) of the input electrical signal is 2 3v, and the input optical power varies from 5 to10mw. The result are as follow In order to obtain a larger extinction ratio, it tends to increase the length of both arms of the modulator or the VPP of the input electrical signal when other condition are the same, but the ER is insensitive to changes in input optical intensity; When the length of the modulation arm is changed from 1 to 3mm, the OMA increases first and then decreases, and the BER changes inversely. Therefore, the maximum OMA and the lowest BER can be obtained by optimizing the arm length of the modulator; the BER of the modulator decreases as the input optical intensity and the VPP increases.
author_names: Zhixiong Li

Fengman Liu

Yu Sun

Huimin He

Haiyun Xue

Juan Wei
title: Study on Characteristics of Mach Zehnder Electro Optical Modulator
venue: 2019 20th International Conference on Electronic Packaging Technology(ICEPT)
year: 2019

abstract: In this paper, we propose a reconfigurable scheme for implementation of an electro optical logic gate by utilizing a Mach Zehnder interferometer (MZI) based structure. In order to achieve high performance and small footprint for the proposed logic gate, we have used a compact, broadband, low power and high speed MZI based electro optical switch which consists of a silicon graphene slot waveguide as phase shifter in each arm of the MZI structure. Our design can perform electro optical AND, OR and XOR logic functions in three different operational modes by using three electrical control signals. The functionality of the reconfigurable electro optical logic gate is investigated with the help of eye diagram analysis for all three operational modes. Simulation results show that the proposed reconfigurable logic gate is able to work under at least 62.5 Gbit/s with high extinction ratio (ER) about 24.6 dB for transverse electric polarization mode at telecommunication wavelength of 1.55 [Formula: see text]m.
author_names: Hossein Zivarian

Abbas Zarifkar
title: A reconfigurable scheme for realization of electro optical logic gate based on silicon graphene Mach Zhender interferometer
venue: International Journal of Modern Physics B
year: 2019

abstract: The system for stabilizing an operating point of remote integrated optical Mach Zehnder modulators with a dual output has been developed. The designed electronic circuit for precise bias control had low power consumption (less than 5 mW) and could be powered through optical fiber by signal optical radiation at a wavelength of 1550 nm with a power of 15 mW. The experimental demonstration of common mode noise rejection proved a high accuracy of the quadrature operating point setting and stabilization, resistance to the light intensity noise, and low level noise and distortion added to the transmitted signals.
author_names: Aleksei Petrov

Aleksandr V Tronev

Peter Agruzov

Aleksandr Shamrai

Vladimir Sorotsky
title: System for Stabilizing an Operating Point of a Remote Electro Optical Modulator Powered by Optical Fiber
year: 2020

abstract: A Wide Band LiNbO3 Electro Optical Modulator was designed and Fabricated. The LiNbO3 integrated optical intensity modulators consist of Mach Zehnder interferometer optical waveguide circle and coplanar waveguide (CPW) modulation electrode structure. The effects of CPW's parameter on the transmission performance of microwave by using the finite element method. Experimental results show that the fabricated Modulator obtain insert loss of 3.5dB, the extinction ratio of 30dB, the half wave voltage of the DC electrode of 4V,the half wave voltage of the traveling wave electrode of 5.5V, the power reflection of less than 13dB, the 3dB bandwidth of 18GHz
author_names: Jianwei Zhou

Junlei Xia

Ruidan Liu

Jian-li Qiao
title: Design and fabrication of wide band LiNbO3 electro optical modulator
venue: Other Conferences
year: 2019

abstract: In this Letter, we reported the preliminary results of an integrating periodically capacitive loaded traveling wave electrode (CL TWE) Mach Zehnder modulator (MZM) based on InP based multiple quantum well (MQW) optical waveguides. The device configuration mainly includes an optical Mach Zehnder interferometer, a direct current electrode, two phase electrodes, and a CL TWE consisting of a U electrode and an I electrode. The modulator was fabricated on a 3 in. InP epitaxial wafer by standard photolithography, inductively coupled plasma dry etching, wet etching, electroplating, etc. Measurement results show that the MZM exhibits a 3 dB electro optic bandwidth of about 31 GHz, a Vp of 3 V, and an extinction ratio of about 20 dB.
author_names: Guang Qian

Bin Niu

Wu Zhao

Qiang Kan

Xiaowen Gu

Fengjie Zhou

Yuechan Kong

Tangsheng Chen
title: CL TWE Mach Zehnder electro optic modulator based on InP MQW optical waveguides
year: 2019

author_names: V M Afanas'ev
title: THE ELECTRO OPTICAL MODULATOR ACCORDING TO THE SCHEME OF THE INTERFEROMETER OF MACH ZEHNDER
year: 2016