中国激光, 2018, 45 (4): 0400001, 网络出版: 2018-04-13
双光梳光谱技术研究进展 
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Research Advances in Dual-Comb Spectroscopy
图 & 表
图 1. (a)理想锁模激光器输出脉冲电场的时域和频域结构示意图;(b)光梳的3种典型锁定方案
Fig. 1. (a) Time domain and frequency domain diagrams for pulse electric field of ideal mode-locking laser; (b) three typical locking schemes for OFCs
图 2. (a)基于光梳的FTS主动测量原理示意图[25];(b) DCS测量原理示意图[25];(c) DCS的时域异步光取样测量过程;(d) DCS的频域多外差测量过程
Fig. 2. (a) Schematic for actively measuring principle of OFC-based FTS[25]; (b) schematic for DCS measuring principle[25]; (c) asynchronous optical sampling and measuring process in time domain; (d) multiheterodyne in frequency domain for measuring process of DCS
图 3. 光频参考锁定光梳的结构示意图[24]
Fig. 3. Configuration of OFC locked with optical frequency reference scheme[24]
图 4. (a)相干DCS的结构示意图[36];(b)测量的HCN相位和透过光谱[36];(c)图4(b)中195 THz附近的局部放大图,其中相位(绿色实线)和透过谱的实测值(黑色实线)与吸收谱数据经Kramers-Kronig关系计算后的结果(蓝色点线,偏置0.1 rad)相吻合[36]
Fig. 4. (a) Configuration of coherent DCS[36]; (b) measured phase and transmission spectra for HCN sample[36];(c) local zoom near 195 THz in Fig.4(b), measured phase (green curve) and transmission spectra (black curve) agree well with theoretical results (dotted blue line, and offset by 0.1 rad) calculated from absorption data through Kramers-Kronig relation[36]
图 5. (a)相干DCS用于开放光程多组分路径温室气体在线测量实验现场[59];(b) DCS测量结果与HITRAN数据库结果的对比[59];(c)车载光梳实物照片[61]
Fig. 5. (a) Experimental site layout of open-path multicomponent greenhouse gas online measurements with coherent DCS[59]; (b) comparison of results of greenhouse gases measured by coherent DCS with those calculated with HITRAN database[59]; (c) photograph of vehicle-borne OFC[61]
图 6. (a)基于FBG跟踪记录误差信号的自适应DCS方案[37];(b)自适应DCS的测量结果[37]
Fig. 6. (a) Adaptive DCS scheme based on tracking-recording error signal technique with FBG[37]; (b) measured results with adaptive DCS[37]
图 7. (a)基于CW激光参考的自适应DCS示意图[22];(b)恒定时钟和自适应时钟取样时测得的C2H2吸收谱与HITRAN数据库结果的对比[22]
Fig. 7. (a) Schematic of adaptive DCS based on CW laser references[22]; (b) comparison of C2H2 absorption spectra respectively measured by constant and adaptive clocks sampling with those obtained by using HITRAN database[22]
图 8. 基于腔调谐与延时复用技术的单光梳DCS方案的结构示意图和测量原理[27]。(a)结构示意图;(b)测量原理
Fig. 8. Configuration and measuring principle of DCS scheme based on single OFC with repetition rate tuned and time-delay-multiplexing technique[27]. (a) Configuration; (b) measuring principle
图 9. (a)基于腔内双向传输双输出端的单激光器DCS[57];(b)基于双波长锁模的单个光纤激光器DCS[30]
Fig. 9. (a) DCS based on single laser source with dual-output ports extract lights respectively propagating in different directions inside cavity[57]; (b) DCS with dual-wavelength mode-locked fiber laser[30]
图 10. (a)基于脉冲相位调制技术[66]和(b)光谱交织方法[69]提高DCS光谱测量分辨率的原理方案
Fig. 10. Operation principles and realization schemes for improving spectral resolution of DCS with (a) phase-modulated pulse technique[66]and (b) spectral interleave scheme[69]
图 11. 已报道的DCS光谱测量波段与范围
Fig. 11. Measureable wavebands and spectral ranges for DCS published
表 1已报道的DCS的性能指标
Table1. Performance indexes for reported DCS
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路桥, 时雷, 毛庆和. 双光梳光谱技术研究进展[J]. 中国激光, 2018, 45(4): 0400001. Lu Qiao, Shi Lei, Mao Qinghe. Research Advances in Dual-Comb Spectroscopy[J]. Chinese Journal of Lasers, 2018, 45(4): 0400001.
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