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Journal of semiconductors 2010年第10期31卷 47-51页

作者：饶岚宋国峰陈良惠 Institute of semiconductors Chinese Academy of Sciences School of Electronic Engineering Beijing University of Posts and Telecommunications

In order to analyze the thermal characteristics of the cavity facet of a semiconductor laser, a home-built near-field scanning optical microscopy （NSOM） is employed to probe the topography of the facet. By comparing the topographic images of two samples under different DC current injections, we can find that the thermal characteristic is related to its lifetime. We show that it is possible to predict the lifetime of the semiconductor laser diode with nondestructive tests.

关键词： semiconductor laser NSOM thermal expansion

semiconductor photonic crystal laser

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Chinese Physics B 2018年第11期27卷 167-175页

作者：郑婉华 State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Laboratory of Solid State Optoelectronics Information Technology Institute of Semiconductors Chinese Academy of Sciences College of Future Technology University of Chinese Academy of Sciences

By combing artificial micro–nano structures, photonic crystals（PCs）, with traditional semiconductor laser material to realize the dynamic collaborative control of photonic states and confined electrons, the band engineering of the PC has been confirmed. This brings new development space for the semiconductor laser, such as for low threshold and high efficiency.Based on a series of works by Zheng＇s group, this paper has reviewed kinds of PC lasers including electrical injection PC vertical cavity and lateral cavity surface-emitting lasers, and PC high beam quality lasers, to show that the PC is vital for promoting the continuous improvement of semiconductor laser performance at present and in the future.

关键词： semiconductor laser photonic crystal complex cavity

Tunable and broadband microwave frequency combs based on a semiconductor laser with incoherent optical feedback

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Chinese Physics B 2015年第5期24卷 363-368页

作者：赵茂戎吴正茂邓涛周桢力夏光琼 School of Physical Science and Technology Southwest University State Key Laboratory of Millimeter Waves Southeast University

Based on a semiconductor laser （SL） with incoherent optical feedback, a novel all-optical scheme for generating tunable and broadband microwave frequency combs （MFCs） is proposed and investigated numerically. The results show that, under suitable operation parameters, the SL with incoherent optical feedback can be driven to operate at a regular pulsing state, and the generated MFCs have bandwidths broader than 40 GHz within a 10 dB amplitude variation. For a fixed bias current, the line spacing （or repetition frequency） of the MFCs can be easily tuned by varying the feedback delay time and the feedback strength, and the tuning range of the line spacing increases with the increase in the bias current. The linewidth of the MFCs is sensitive to the variation of the feedback delay time and the feedback strength, and a linewidth of tens of KHz can be achieved through finely adjusting the feedback delay time and the feedback strength. In addition, mappings of amplitude variation, repetition frequency, and linewidth of MFCs in the parameter space of the feedback delay time and the feedback strength are presented.

关键词： semiconductor laser incoherent optical feedback microwave frequency combs

Flexible control of semiconductor laser with frequency tunable modulation transfer spectroscopy

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Chinese Physics B 2018年第7期27卷 321-324页

作者：茹宁王宇马慧娟胡栋张力樊尚春 School of Instrumentation Science and Opto-electronics Engineering Beihang University Key Laboratory for Metrology Changcheng Institute of Metrology and Measurement

We introduce a new method of simultaneously implementing frequency stabilization and frequency shift for semiconductor lasers. We name this method the frequency tunable modulation transfer spectroscopy （FTMTS）. To realize a stable output of 780 nm semiconductor laser, an FTMTS optical heterodyne frequency stabilization system is constructed. Before entering into the frequency stabilization system, the probe laser passes through an acousto-optical modulator （AOM） twice in advance to achieve tunable frequency while keeping the light path stable. According to the experimental results, the frequency changes from 120 MHz to 190 MHz after the double-pass AOM, and the intensity of laser entering into the system is greatly changed, but there is almost no change in the error signal of the FTMTS spectrum. Using this signal to lock the laser frequency, we can ensure that the frequency of the laser changes with the amount of AOM shift. Therefore, the magneto-optical trap （MOT）-molasses process can be implemented smoothly.

关键词： semiconductor laser frequency stabilization frequency shift frequency tunable modulation trans-fer spectroscopy

Influences of semiconductor laser on fibre-optic distributed disturbance sensor based on Mach-Zehnder interferometer

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Chinese Physics B 2010年第12期19卷 339-346页

作者：梁生张春熹蔺博林文台李勤钟翔李立京 School of Instrument Science and Opto-Electronics Engineering Beihang University Photonics Research Centre School of Electrical and Electronic EngineeringNanyang Technological University50 Nanyang Avenue639798Singapore

This paper investigates the influences of a semiconductor laser with narrow linewidth on a fibre-optic distributed disturbance sensor based on Mach-Zehnder interferometer. It establishes an effective numerical model to describe the noises and linewidth of a semiconductor laser, taking into account their correlations. Simulation shows that frequency noise has great influences on location errors and their relationship is numerically investigated. Accordingly, there is need to determine the linewidth of the laser less than a threshold and obtain the least location errors. Furthermore, experiments are performed by a sensor prototype using three semiconductor lasers with different linewidths, respectively, with polarization maintaining optical fibres and couplers to eliminate the polarization induced noises and fading. The agreement of simulation with experimental results means that the proposed numerical model can make a comprehensive description of the noise behaviour of a semiconductor laser. The conclusion is useful for choosing a laser source for fibre-optic distributed disturbance sensor to achieve optimized location accuracy. What is more, the proposed numerical model can be widely used for analysing influences of semiconductor lasers on other sensing, communication and optical signal processing systems.

关键词： fibre-optic distributed sensor semiconductor laser narrow linewidth laser fibre-optic interferometric sensor

Numerical Simulation of External-Cavity Distributed Feedback semiconductor laser

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Optics and Photonics Journal 2023年第6期13卷 109-118页

作者： Tianyu Guan Chaoze Zhang Yuqin Mao Ligang Huang Tao Zhu Key Laboratory of Optoelectronic Technology and Systems Chongqing University Chongqing China

We propose a theoretical model to describe external-cavity distributed feedback semiconductor lasers and investigate the impact of the number of external feedback points on linewidth and side-mode suppression ratio through numerical simulation. The simulation results demonstrate that the linewidth of external-cavity semiconductor lasers can be reduced by increasing the external cavity length and feedback ratio, and adding more external feedback points can further narrow the linewidth and enhance the side mode suppression ratio. This research provides insight into the external cavity distributed feedback mechanism and can guide the design of high-performance external cavity semiconductor lasers. .

关键词： External-Cavity Distributed Feedback Linewidth Compression Mul-ti-Point Feedback Narrow-Linewidth laser semiconductor laser

The developing condition analysis of semiconductor laser frequency stabilization technology

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Journal of semiconductors 2018年第11期39卷 40-46页

作者： Yijun Yao Canwen Zou Haiyang Yu Jinjin Guo Yaming Li Jianguo Liu State Key Laboratory on Integrated Optoelectronics Institution of Semiconductors Chinese Academy of Sciences College of Materials Science and Opto-Electronic Technology University of Chinese Academy of Sciences Key Laboratory of Aerospace Information Applications CETC College of Electronic Electrical and Communication Engineering University of Chinese Academy of Sciences

The frequency stability of free-running semiconductor lasers is influenced by several factors, such as driving current and external operating environment. The frequency stabilization of laser has become an international research hotspot in recent years. This paper reviews active frequency stabilization technologies of laser diodes and elaborates their principles. Based on differences of frequency discrimination curves, these active frequency stabilization technologies are classified into three major types, which are harmonic frequency stabilization,Pound-Drever-Hall(PDH) technology and curve subtraction frequency stabilization. Further, merits and demerits of each technology are compared from aspects of frequency stability and structure complexity. Finally, prospects of frequency stabilization technologies of semiconductor lasers are discussed in detail. Combining several of these methods are future trends, especially the combination of frequency stabilization of F–P cavity. And PID electronic control for optimizing the servo system is generally added in the methods mentioned above.

关键词： semiconductor laser frequency stabilization active frequency stabilization frequency discriminator