基于高阶边带注入法布里-珀罗激光器的多路线性扫频光源  

Optical Source with Multichannel Linearly Swept Frequency Based on High⁃Order Sideband Injected Fabry⁃Perot Laser

作　　者：王文轩 廉安 李连艳 张云山[3] 颜雅西 余长源[2] 陈向飞[4] Wang Wenxuan;Lian an;Li Lianyan;Zhang Yunshan;Yan Yaxi;Yu Changyuan;Chen Xiangfei(Ocean College,Jiangsu University of Science and Technology,Zhenjiang 212003,Jiangsu,China;Department of Electrical and Electronic Engineering,The Hong Kong Polytechnic University,Hong Kong 999077,China;College of Electronic and Optical engineering&College of Flexible Electronics(Future Technology),Nanjing University of Posts and Telecommunications,Nanjing 210023,Jiangsu,China;Key Laboratory of Intelligent Optical Sensing and Manipulation,Ministry of Education,Nanjing University,Nanjing 210023,Jiangsu,China)

机构地区：[1]江苏科技大学海洋学院,江苏镇江212003 [2]香港理工大学电机与电子工程学系,中国香港999077 [3]南京邮电大学电子与光学工程学院、柔性电子(未来技术)学院,江苏南京210023 [4]南京大学智能光感知与调控技术教育部重点实验室,江苏南京210023

出　　处：《中国激光》2024年第14期109-117,共9页Chinese Journal of Lasers

基　　金：国家自然科学基金(62374092、 62374092、 62004105);the Hong Kong Innovation and TechnologyFund(PRP/006/20FX);江苏省重点研发计划(BE2023083);镇江市社会发展性科技计划项目(FZ2022056);江苏科技大学引进人才科研启动项目(1202932206)。

摘　　要：基于高阶边带调制和光注入法布里-珀罗(F-P)激光器的波长选择性放大理论,设计并实现了一种具有较宽扫频范围和较窄线宽特性的多路线性扫频光源(SOS)。由窄线宽激光器阵列产生的多个光波经过线性扫频电信号调制后,产生多路高阶边带扫频光信号。利用同步电流补偿,将光信号注入并锁定F-P激光器的多个纵模,经放大边带信号后能获得多路线性扫频光源。实验使用了4个窄线宽激光器,将光信号注入F-P激光器锁定三阶边带,可以同时产生4路线性扫频光源,其扫频范围和扫频速率比一阶边带数值提高了3倍,分别为39.8~44.2 GHz和9.28 THz/s,实现线性度超过99.9992%和线宽低于1 kHz。所提结构可以应用于调频连续波(FMCW)激光雷达和光频域反射(OFDR)分布式光纤传感。Objective Broadband, narrow-linewidth, and ultralinearly swept optical sources are critical in several applications, including fiber network diagnostics, environmental monitoring, laser radar imaging, and phase-coherent optical communication. Current methods for optical frequency sweeping include the inner-cavity tuning of a tunable laser and the external modulation of a continuous-wave(CW)light wave. One of the most recent solutions involves employing a wavelength-tunable laser array to achieve a wide sweep range.However, the complex internal-cavity tuning control results in sweeping linearly differences and broad linewidths. By contrast,external high-order modulation uses a swept radio frequency(RF) signal combined with a four-wave mixing(FWM) process to achieve ultralinearly frequency sweeps and millimeter resolutions. Nevertheless, phase noise increases in FWM, thus complicating the structure for implementing a multichannel swept source. Herein, we report the development of a multichannel ultralinearly swept optical source(SOS) with broadbands and narrow linewidths based on high-order sideband modulation and an optical injection-locked Fabry-Perot(F-P) laser. This approach enables wide sweep ranges, high resolutions, and multiple channels to be obtained. We hypothesize that the injection-locked F-P laser can provide multichannel frequency sweeps as well as serve as an optical filter and amplifier. The SOS is particularly suitable for precision LiDAR and remote, optical frequency-domain reflectometry(OFDR) systems.Methods A tunable laser array comprising multiple narrow-linewidth tunable lasers converted a frequency-swept RF signal into the optical domain. To expand the optical sweeping range, high-order sidebands were generated by increasing the injected RF power and using low-Vπ intensity modulators(IM). According to high-order modulation theory, the frequency shift Δω of the RF-driven signal corresponded to the frequency shift nΔω of the nth sideband. The injection-locking setup was utilized as an opti

关 键 词：法布里-珀罗激光器 光电器件 线性扫频 高阶调制 光注入 

分 类 号：TN247[电子电信—物理电子学]