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Modulated bandwidth enhancement in an amplified feedback laser

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Chinese Optics Letters 2015年第4期13卷 45-49页

作者：余力强郭露陆丹吉晨王皓赵玲娟 Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of Sciences

We report a direct, modulated bandwidth enhancement in a amplified feedback laser （AFL）, both experimen- tally and numerically. By means of fabricated devices, an enhanced -3 dB bandwidth of 27 GHz with an in-band flatness of ±3 dB is experimentally confirmed at 13℃. It is numerically confirmed that the modulated bandwidth of the AFL can be enhanced to two times its original bandwidth, with more controlled flexibility to realize a flat, small-signal response.

关键词： Modulated bandwidth enhancement in an amplified feedback laser mode AFL dBm DFB PP

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Simulation and experimental characterization of a dual-mode two-section amplified feedback laser with mode separation over 100 GHz

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Chinese Optics Letters 2014年第11期12卷 26-30页

作者：潘碧玮余力强陆丹张莉萌赵玲娟 Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of Science

A tunable two-section amplified feedback laser, which employs an amplifier section as the integrated feedback cavity, is designed and fabricated for dual-mode operation with mode separation of 100 GHz. Detailed simulations and experimental characterizations on the performance of the laser are presented. Promising dual-mode emission with continuous tuning range over 16 GHz（87.41–103.64 GHz） is experimentally demonstrated.

关键词： mode Simulation and experimental characterization of a dual-mode two-section amplified feedback laser with mode separation over 100 GHz over

1.5 μm dual-lateral-mode distributed Bragg reflector laser for terahertz excitation

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Chinese Optics Letters 2016年第1期14卷 70-74页

作者：张莉萌余力强潘碧玮陆丹潘教青赵玲娟 Key Laboratory of Semiconductor Materials Science Institute of Semiconductors Chinese Academy of Science and Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices

A terahertz excitation source based on a dual-lateral-mode distributed Bragg reflector （DBR） laser working in the 1.5 μm range is experimentally demonstrated. By optimizing the width of the ridge waveguide, the fundamental and the first-order lateral modes are obtained from the laser. The mode spacing between the two modes is 9.68 nm, corresponding to a beat signal of 1.21 THz. By tuning the bias currents of the phase and DBR sections, the wavelengths of the two modes can be tuned by 2 nm, with a small strength difference （〈5 dB） and a large side-mode suppression ratio （SMSR 〉 45 dB）.

关键词： Bragg reflectors Distributed Bragg reflectors Laser excitation Reflection Ridge waveguides

All-optical clock recovery for 40 Gbaud NRZ-QPSK signals using amplified feedback DFB laser diode

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Chinese Optics Letters 2014年第8期12卷 44-47页

作者：余力强李岩臧继召陆丹潘碧玮赵玲娟 Key Laboratory of Semiconductor Materials Science Institute of Semiconductors Chinese Academy of Sciences Beijing 100086 China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing 100876 Ghina

An all-optical clock recovery scheme based on monolithic amplified feedback DFB laser （AFL） diode is proposed for nonreturn-to-zero （NRZ） quadrature phase shift keying （QPSK） format signals. By using a preprocessing stage, clock recovery （CR） is successfully demonstrated for 40-Gbaud NRZ-QPSK signals based on this scheme. The dependence of the timing jitter of the recovered clock on the optical power of the injected signal is investigated. A minimum timing jitter of 362.8 fs （integrated within a frequency range from 10 Hz to 10 MHz） is obtained.

关键词： Atomic clocks Distributed feedback lasers Electric clocks Feedback Optical variables measurement Phase shift Phase shifters Recovery Timing jitter

Fabrication of widely tunable ridge waveguide DBR lasers for WDM-PON

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Chinese Optics Letters 2014年第9期12卷 41-44页

作者：韩良顺梁松张灿余力强赵玲娟朱洪亮王宝军吉晨王圩 Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of Science

We report the fabrication of widely tunable ridge waveguide distributed Bragg reflector （DBR） lasers with InGaAsP butt-joint as grating material. The shape of the butt-joint interface is found to have significant effect on the properties of the lasers. It is shown that irregular mode jumps during wavelength tuning can be avoided by a V-shaped butt-joint interface. From the fabricated device, 23 channels with 0.8 nm spacing and greater than 35 dB side mode suppression ratios are obtained. The different tuning characteristics of the ridge waveguide and the previously reported buried ridge stripe DBR lasers are discussed. Combined with the wide tuning range and the simple structure, the ridge waveguide DBR lasers are promising for use in wavelength division multiplexing passive optical networks （WDM-PONs）.

关键词： Butt welding DBR lasers Fabrication Optical waveguides Passive optical networks Waveguides Wavelength division multiplexing

100 Gb/s all-optical clock recovery based on a monolithic dual-mode DBR laser

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Chinese Optics Letters 2016年第3期14卷 28-31页

作者：潘碧玮余力强郭露张莉萌陆丹陈新武岳娄采云赵玲娟 Key Laboratory of Semiconductor Materials Science Institute of Semiconductors Chinese Academy of Science Tsinghua National Laboratory for Information Science and Technology State Key Laboratory of Integrated Optoelectronics Department of Electronic Engineering Tsinghua University

We experimentally demonstrate all-optical clock recovery for 100 Gb/s return-to-zero on-off keying signals based on a monolithic dual-mode distributed Bragg reflector （DBR） laser, which can realize both mode spacing and wavelength tuning. By using a coherent injection locking scheme, a 100 GHz optical clock can be recovered with a timing jitter of 530 fs, which is derived by an optical sampling oscilloscope from both the phase noise and the power fluctuation. Furthermore, for degraded injection signals with an optical signal-to-noise ratio as low as 4.1 dB and a 25 km long distance transmission, good-quality optical clocks are all successfully recovered.

关键词： Atomic clocks Cathode ray oscilloscopes DBR lasers Electric clocks Light transmission Optical communication Optical signal processing Optical variables measurement Recovery Signal to noise ratio Timing jitter

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InP基少模半导体激光器

光学学报 2015年第A2期35卷 16-19页

作者：张莉萌陆丹余力强潘碧玮赵玲娟中国科学院半导体研究所材料重点实验室北京100083

针对少模光通信需求，仿真设计并制作了一种基于压应变量子阱结构的少模激光器。通过调整工作电流，该器件可以实现基模和一阶模工作。利用该器件成功激发了少模光纤的LR01模和LP11模。这种器件制作方法简单、成本低、易于集成，可作为... 详细信息

针对少模光通信需求，仿真设计并制作了一种基于压应变量子阱结构的少模激光器。通过调整工作电流，该器件可以实现基模和一阶模工作。利用该器件成功激发了少模光纤的LR01模和LP11模。这种器件制作方法简单、成本低、易于集成，可作为少模通信系统的光源，为空分复用系统中发射端的集成化提供了可能。

关键词：光通信半导体激光器模式光学器件

基于光反馈单片集成放大反馈激光器的窄线宽激光和微波信号产生

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光学学报 2015年第A2期35卷 137-141页

作者：潘碧玮陆丹余力强张莉萌赵玲娟中国科学院半导体研究所材料重点实验室北京100086

提出了一种基于单片集成放大反馈激光器在光反馈的条件下产生窄线宽激光和窄线宽微波信号的方法。在不同的注入电流下，放大反馈激光器可以实现稳定的单模和双模激射。单模激射下，器件的激射波长为1546．6nm，边摸抑制比可达54．2dB，... 详细信息

提出了一种基于单片集成放大反馈激光器在光反馈的条件下产生窄线宽激光和窄线宽微波信号的方法。在不同的注入电流下，放大反馈激光器可以实现稳定的单模和双模激射。单模激射下，器件的激射波长为1546．6nm，边摸抑制比可达54．2dB，线宽为9．59MHz。双模激射下，模式间距为0．3nm，对应拍频频率为37．6GHz，拍频线宽为4．2MHz。通过引入一个双环光纤外腔，可以将放大反馈激光器输出的光信号反馈回激光器，提高整个复合腔的光子寿命，从而压缩光信号的线宽。在合适的反馈强度下，单模工作时光信号的线宽从9．95MHz减小到2．6kHz。双模工作时拍频信号的线宽从4．2MHz减小到1．6kHz，均减小三个数量级以上。

关键词：激光器微波分布反馈激光器注入锁定激光器集成光学器件

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20kHz窄线宽光纤光栅外腔半导体激光器

中国激光 2015年第5期42卷 41-45页

作者：潘碧玮余力强陆丹李林森张莉萌李召松苏辉赵玲娟中国科学院半导体研究所材料重点实验室北京100086 中国科学院福建物质结构研究所福建350002

采用多量子阱掩埋条形（BRS）增益芯片和拉锥光纤布拉格光栅（FBG）,制作了1.5μm波段FBG外腔式窄线宽半导体激光器。封装后器件实现了全电流范围内稳定单模窄线宽激光输出。30~250 m A驱动电流下线宽小于15.48 k Hz,实测最小线宽为6.42... 详细信息

采用多量子阱掩埋条形（BRS）增益芯片和拉锥光纤布拉格光栅（FBG）,制作了1.5μm波段FBG外腔式窄线宽半导体激光器。封装后器件实现了全电流范围内稳定单模窄线宽激光输出。30~250 m A驱动电流下线宽小于15.48 k Hz,实测最小线宽为6.42 k Hz,频率稳定度为7.2×10-8/s,边模抑制比大于40 d B,最大出纤功率大于10 m W。这种集成窄线宽激光器性能优异,且制作成本低,工艺简单,适于批量生产,可应用于400 Gb/s相干通信系统的发射源与接收机本振源。

关键词：激光器半导体激光器相干通信集成光学器件光纤布拉格光栅