500 GHz宽带双偏振光学频率梳的产生  

Generation of 500-GHz Broadband Dual-Polarization Optical Frequency Comb

作　　者：庞海越 李沼云 刘欢[1] 陶智勇 樊亚仙 Pang Haiyue;Li Zhaoyun;Li Huan;Tao Zhiyong;Fan Yaxian(Guangxi Key Laboratory of Wireless Broadband Communication and Signal Processing,School of Information Communication,Guilin University of Electronic Technology,Guilin,Guangxi 541004,China;The 34th Research Institute of China Electronics Technology Group Corporation,Guilin,Guangxi 541004,China)

机构地区：[1]桂林电子科技大学信息与通信学院广西无线宽带通信与信号处理重点实验室,广西桂林541004 [2]中国电子科技集团公司第三十四研究所,广西桂林541004

出　　处：《中国激光》2021年第9期19-27,共9页Chinese Journal of Lasers

基　　金：国家自然科学基金(12064005)。

摘　　要：提出了一种基于光电反馈产生500 GHz宽带双偏振光学频率梳的方案。该方案基于光电环路反馈1550 nm垂直腔面发射激光器,采用自旋反转模型,利用四阶龙格-库塔算法数值仿真研究了光电反馈参数对光学频率梳特性的影响。研究结果表明:通过光电反馈参数的调节可以控制1550 nm垂直腔面发射激光器输出的偏振状态,可实现Y偏振和X偏振光学频率梳的转换。此外,研究发现,在特定的光电反馈参数条件下,可获得Y偏振和X偏振同时存在的双偏振光学频率梳。并且在一定的光电反馈参数范围内,两个偏振方向的光学频率梳的光谱带宽都会随着光电反馈系数的增加而增大,相应的功率谱会随光电反馈系数的增加而变得越来越平坦。通过光电反馈系数及反馈时间的调节,获得了谱线平坦、梳线纯净、谱带超宽的光学频率梳,在10 dB幅度范围内Y偏振光学频率梳的光谱带宽可达250 GHz,X偏振光学频率梳的光谱带宽可达500 GHz。Objective Optical frequency combs(OFC)consist of a series of evenly spaced discrete spectral components that maintain high spectral coherence.It can be applied in many fields,such as metrology,spectroscopy,optical arbitrary waveform generation,THz generation,microwave photonics,and optical communications.Among the available optical comb technologies,OFC based on semiconductor lasers provides suitable combs with competitive costs and efficiency.Vertical-cavity surface-emitting laser(VCSEL)is a single-longitudinal mode semiconductor laser.Compared with an edge emitter,VCSEL has some advantages,such as on-wafe test capability,lower energy consumption,lower manufacturing cost,and circular output beam.VCSEL can emit in two orthogonal linear polarization modes.Polarization switching between these modes can be found when changing the temperature or bias current applied to the VCSEL.These properties make them appropriate for OFC generation.Dual-polarization OFC-based VCSEL can be generated due to the special polarization properties.Further efforts are required to improve OFC-based on VCSEL,especially to expand the optical span while maintaining the existing advantages.In this study,we proposed a scheme for generating broadband dual-polarization OFC based on a 1550-nm VCSEL under optoelectronic feedback,opening perspectives for polarization-sensitive sensing and multicarriers optical sources for polarization-division multiplexing optical communications.Methods We proposed and analyzed theoretically a scheme for generating a 500-GHz dual-polarization optical frequency comb based on a 1550-nm VCSEL under optoelectronic feedback.Besides,we numerically investigated the influences of optoelectronic feedback parameters on the performances of the generated optical frequency comb.The proposed model considered the optoelectronic feedback based on the rate equations of the spin-flip model of 1550-nm VCSEL.First,we proposed a schematic diagram of a broadband dual-polarization OFC generation based on a 1550-nm VCSEL under optoelectro

关 键 词：激光光学 光学频率梳 光电反馈 垂直腔面发射激光器 双偏振 

分 类 号：TN248.4[电子电信—物理电子学]