单腔双光梳锁模光纤激光器及其应用研究进展  

Recent Progress of Single-Cavity Dual-Comb Mode-Locked Fiber Lasers and Their Applications

作　　者：杨昌喜[1] 赵康俊 曹博[1] 高晨心 肖晓晟 Yang Changxi;Zhao Kangjun;Cao Bo;Gao Chenxin;Xiao Xiaosheng(State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision Instruments,Tsinghua University,Beijing 100084,China;State Key Laboratory of Information Photonics and Optical Communications,School of Electronic Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]清华大学精密仪器系精密测试技术与仪器国家重点实验室,北京100084 [2]北京邮电大学电子工程学院信息光子学与光通信国家重点实验室,北京100876

出　　处：《中国激光》2021年第15期3-19,共17页Chinese Journal of Lasers

基　　金：国家自然科学基金(61077032,61177046,61377039,61975090)。

摘　　要：双光梳光谱技术作为一种新兴的宽带光谱测量技术,具有超高分辨率、高灵敏度和高采样率的特点,在气体吸收谱测量、温室气体排放监控、非线性光谱成像等领域具有重要应用。研究表明,仅从一台激光器中产生高相干的双光梳光源,克服了传统双光梳光源产生方法中存在的频率锁定系统复杂、梳齿数量较少、制作工艺困难等缺点,这种光源是理想的双光梳光源之一。结合国内外相关研究进展,综述了单腔双光梳的产生方法、单腔双光梳锁模光纤激光器中的孤子动力学研究以及单腔双光梳的应用。Significance Optical frequency combs (OFCs) with ultrahigh stability have revolutionized metrology science and facilitated a series of new research disciplines and directions,such as optical clock,precision spectroscopy,absolute distance measurement,and astrophysics.Recently,dual-comb spectroscopy (DCS),as an emerging broadband spectroscopic technique,has attracted substantial attention owing to its outstanding advantages of ultrahighfrequency resolution,accuracy,and sampling rate.DCS has significant applications in various areas,such as gas absorption spectroscopy,greenhouse gas monitoring,and nonlinear spectral imaging.To achieve DCS,two coherent OFCs with a small offset of comb spacing are demanded.Various approaches could be used to generate these two OFCs,including phase-locking two independent mode-locked lasers,modulating a continuous-wave (CW) laser using two electro-optic modulators,or by directionally pumping a microresonator using a CW laser (Fig.3).However,those dual-comb systems generally require high-cost and bulky electronic configurations,a limited number of comb lines,or sophisticated fabrication processes,which pose substantial challenges for their practical applications.Dual-comb lasing in a single fiber laser (known as single-cavity dual-comb mode-locked fiber laser) is a viable alternative for releasing DCS,owing to mode-locking of direction/wavelength/polarization/cavity multiplexing.Because both combs are created from a single cavity,a compact and low-complexity DCS is possible owing to intrinsic high phase coherence and the absence of complex servo locking systems.This article reviews the recent research progress of single-cavity dual combs,ranging from their generation approaches,soliton dynamics to applications.Progress Four types of multiplexing methods to generate dual combs from a single cavity-directions (Fig.4),wavelengths (Fig.5),polarization (Fig.6),and cavity spaces are first summarized.Generally,the spectra of wavelength multiplexing dual combs do not overlapp,leading to the nec

关 键 词：激光器 双光梳光谱技术 单腔双光梳 锁模光纤激光器 

分 类 号：TN248[电子电信—物理电子学]