Search query: High Order Bragg grating semiconductor laser narrow lineWidth

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abstract: Abstract In order to obtain narrow linewidth semiconductor laser around 1564 nm, we design a distributed Bragg reflector (DBR) laser with high order Bragg gratings (HOBGs) using butterfly encapsulation. The DBR laser is fabricated only by i line lithography technology with grating period of 4. 84 m m groove width of 1. 5 m m and grating length of 72 m m on a strip width of 4 m m The 1mm long devices achieved an output power of 9.9 mW and a side mode suppression ratio (SMSR) more than 30 dB without facet coating at an injection current of 80 mA. The lasers showed ultra narrow Lorentz linewidth of 70 kHz. This paper provides a simple method for large scale production of narrow linewidth semiconductor lasers.
author_names: Hong Chen

Peng Jia

Chao Chen

Li Qin

Yongyi Chen

Youwen Huang

Yongqiang Ning

Lijun Wang
title: Narrow linewidth DBR laser based on high order Bragg grating defined by i line lithography
venue: Optics Communications
year: 2019

abstract: In order to obtain narrow linewidth semiconductor laser around 1564 nm, we design a distributed Bragg reflector (DBR) laser based on surface etched high order Bragg gratings (SE HOBGs) To achieve C band Bragg resonance wavelength selection, the laser is designed as a grating period of 4.84 mm, an etched groove depth of 1.2 mm, a grating duty cycle of 69% a total grating length of 72 mm, and a ridge waveguide width of 4.0 mm. For the DBR laser with cavity length of 1 mm, the output power reaches to 9.9 mW/facet and a 1564 nm laser output with a side mode suppression ratio (SMSR) more than 30 dB at an injection current of 80 mA. We measured and analyzed the phase/frequency noise, linewidth characteristics and the relative intensity noise (RIN) characteristics of the laser in detail. The lasers showed narrow Lorentz linewidth of 70 kHz. This paper provides a simple method for large scale production of narrow linewidth semiconductor lasers.
author_names: Chao Chen

Peng Jia

Li Qin

Yongyi Chen

Hong Chen

Yongqiang Ning

Li-jun Wang
title: Noise and linewidth characterizations of DBR laser based on surface etched high order Bragg gratings
venue: Applied Optics and Photonics China
year: 2019

abstract: Abstract Surface emitting distributed feedback (SE DFB) semiconductor laser has become one of study hotspots due to its narrow linewidth and high power. Herein, a SE DFB semiconductor laser is proposed based on second order Bragg grating for feedback and out coupling. The grating is fabricated on the confinement layer, which can realize the laser emission from the substrate and avoid the secondary epitaxial growth. The asymmetric waveguide structure is introduced into the device to increase the probability of photon and grating interaction while reducing the threshold current. The results show that when the current is 3A, the output laser power from the substrate achieves 1.22 W. In the meantime, the threshold current, voltage and slope efficiency are 300 mA, 1.73 V and 0.45 W/A, respectively. The center wavelength is 980.1 nm and the linewidth is 0.84 nm. This work has important implications for low threshold current narrow linewidth SE DFB semiconductor lasers.
author_names: Yina Hai

Yong-gang Zou

Xiaohui Ma

Haizhu Wang

Lingni Zhu
title: Narrow linewidth surface emitting distributed feedback semiconductor lasers with low threshold current
year: 2021

abstract: We demonstrate ultra narrow linewidth fixed wavelength hybrid lasers composing a semiconductor gain chip and extended silicon nitride Bragg grating. Fabricated ultra low k Bragg gratings provide a narrow bandwidth and high side lobe suppression ratio. A single wavelength 1544 nm hybrid extended distributed Bragg reflector laser with 24 mW output power and a Lorentzian linewidth of 320 Hz is demonstrated, providing a high performance light source for on and off chip applications.
author_names: Chao Xiang

Paul Adrian Morton

John E Bowers
title: Ultra narrow linewidth laser based on a semiconductor gain chip and extended Si3N4 Bragg grating.
venue: Optics letters
year: 2019

abstract: We describe a simple, narrow linewidth, tunable fiber based laser with a high degree of tuning accuracy. A polarization independent semiconductor optical amplifier (SOA) is used as the gain medium in a unidirectional fiber ring cavity with a circulator connected to a 6 meter long chirped fiber Bragg grating (CFBG) The laser wavelength is chosen by setting the modulation frequency of the SOA the same as the harmonics of the fundamental repetition rate of the light reflected at a specific point on the CFBG. Careful management of the drive current and pulse width helps to generate laser light of narrow linewidth (less than 0.03 nm) with low power variation (1.46 dB) over a tuning range of 40 nm.
author_names: Xiong Yang

Robert Lindberg

Walter Margulis

Krister Frojdh

F Laurell
title: Continuously tunable, narrow linewidth laser based on a semiconductor optical amplifier and a linearly chirped fiber Bragg grating.
venue: Optics express
year: 2019

abstract: We experimentally demonstrate an all fiber high power fiber amplifier with high beam quality and a slope efficiency of 81.8% using a fiber Bragg grating stabilized laser diode as a narrow spectral linewidth (0.08 nm) seed source. During amplification, the spectral linewidth of the laser output is broadened from 0.08 to 0.24 nm due to nonlinear phenomena. To the best of our knowledge, we report the first experimental observation of the suppression of stimulated Brillouin scattering (SBS) with increased output power. In addition, we investigated the SBS suppression by simultaneously measuring the optical backscattered power, backscattered spectrum, and output spectrum at different values of output power. The beam quality, M2, was measured to be ~1.28 at the maximum output power of 2.05 kW, and modal instability was not observed.
author_names: Junsu Lee

Kwang Hyun Lee

Hwanseong Jeong

Minkyu Park

Jihoon Seung

Jung Hwan Lee
title: 2.05 kW all fiber high beam quality fiber amplifier with stimulated Brillouin scattering suppression incorporating a narrow linewidth fiber Bragg grating stabilized laser diode seed source.
venue: Applied optics
year: 2019

abstract: Abstract We demonstrated a narrow linewidth monolithic fiber Bragg grating based (FBG based) MOPA configuration fiber laser with a high power spectral density (PSD) In the oscillator, long grating length FBG with narrow reflection bandwidth was employed, combined with a short length resonant cavity, contributing to a narrow linewidth high PSD seed laser. In the amplifier stage, methods were taken to suppress spectrum broadening, such as large core active fiber and wavelength stabilized laser diode. As a result, the fiber laser achieved an output power of 3010 W, a spectral 3 dB bandwidth of 103 pm, and a PSD of 29.3 pm/kW. To the best of our knowledge, this is the highest PSD reported by an all fiber FBG based fiber laser.
author_names: Yusheng Huang

Qirong Xiao

Dan Li

Jingtao Xin

Zehui Wang

Jiading Tian

Yulun Wu

Mali Gong

Lianqing Zhu

Ping Yan
title: 3 kW narrow linewidth high spectral density continuous wave fiber laser based on fiber Bragg grating
year: 2021

abstract: A PQ PMMA Bragg grating served as one of the cavity mirrors in an external V shaped laser cavity using a tapered amplifier as the gain medium. The laser achieves singe longitudinal mode with the output power exceed 600 mW, and has 30 nm tunable spectral range.
author_names: Yu-Hua Hsieh

Te-yuan Chung

Longlong Du

Shiuan Huei Lin
title: A High Power, Narrow Linewidth and Wavelength Tunable Semiconductor Laser Using a Photopolymer Bragg Grating as One of the Cavity Mirrors
year: 2014

abstract: We demonstrate a tunable narrow linewidth laser based on a semiconductor optical amplifier and a linearly chirped FBG. High tuning resolution and small power variation over 40 nm tuning range were achieved by optimizing the drive current. (c) 2019 The Author(s)
author_names: Xiong Yang

Robert Lindberg

Walter Margulis

Krister Frojdh

F Laurell
title: Rapid and Continuously Tunable Narrow Linewidth Fiber Source Based on a SOA and a Linearly Chirped Fiber Bragg Grating
venue: 2019 Conference on Lasers and Electro Optics (CLEO)
year: 2019

abstract: We demonstrate a tunable narrow linewidth laser based on a semiconductor optical amplifier and a linearly chirped FBG. High tuning resolution and small power variation over 40 nm tuning range were achieved by optimizing the drive current. (c) 2019 The Author(s)
author_names: Xiong Yang

Robert Lindberg

Walter Margulis

Krister Frojdh

F Laurell
title: Rapid and Continuously Tunable Narrow Linewidth Fiber Source Based on a SOA and a Linearly Chirped Fiber Bragg Grating
year: 2019