A 23.75-GHz frequency comb with two low-finesse filtering cavities in series for high resolution spectroscopy

doi:10.1088/1674-1056/24/2/024213

中国物理B ›› 2015, Vol. 24 ›› Issue (2): 24213-024213.doi: 10.1088/1674-1056/24/2/024213

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

A 23.75-GHz frequency comb with two low-finesse filtering cavities in series for high resolution spectroscopy

侯磊^a, 韩海年^a, 王薇^b, 张龙^a, 庞利辉^a, 李德华^a, 魏志义^a

a Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
b Department of Physics, Capital Normal University, Beijing 100048, China

收稿日期:2014-07-23 修回日期:2014-08-12 出版日期:2015-02-05 发布日期:2015-02-05
基金资助:
Project supported by the National Basic Research Program of China (Grant No. 2012CB821304) and the National Natural Science Foundation of China (Grant Nos. 11078022 and 61378040).

A 23.75-GHz frequency comb with two low-finesse filtering cavities in series for high resolution spectroscopy

Hou Lei (侯磊)^a, Han Hai-Nian (韩海年)^a, Wang Wei (王薇)^b, Zhang Long (张龙)^a, Pang Li-Hui (庞利辉)^a, Li De-Hua (李德华)^a, Wei Zhi-Yi (魏志义)^a

a Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
b Department of Physics, Capital Normal University, Beijing 100048, China

Received:2014-07-23 Revised:2014-08-12 Online:2015-02-05 Published:2015-02-05
Contact: Han Hai-Nian, Wei Zhi-Yi E-mail:hnhan@iphy.ac.cn;zywei@iphy.ac.cn
Supported by:
Project supported by the National Basic Research Program of China (Grant No. 2012CB821304) and the National Natural Science Foundation of China (Grant Nos. 11078022 and 61378040).

摘要/Abstract

摘要： A laser frequency comb with several tens GHz level is demonstrated, based on a Yb-doped femtosecond fiber laser and two low-finesse Fabry-Pérot cavities (FPCs) in series. The original 250-MHz mode-line-spacing of the source comb is filtered to 4.75 GHz and 23.75 GHz, respectively. According to the multi-beam interferences theory of FPC, the side-mode suppression rate of FPC schemes is in good agreement with our own theoretical results from 27 dB of a single FPC to 43 dB of paired FPCs. To maintain long-term stable operation and determine the absolute frequency mode number in the 23.75-GHz comb, the Pound-Drever-Hall (PDH) locking technology is utilized. Such stable tens GHz frequency combs have important applications in calibrating astronomical spectrographs with high resolution.

关键词: laser frequency comb, Fabry-Pé, rot cavity, high repetition rate, high resolution spectroscopy

Abstract: A laser frequency comb with several tens GHz level is demonstrated, based on a Yb-doped femtosecond fiber laser and two low-finesse Fabry-Pérot cavities (FPCs) in series. The original 250-MHz mode-line-spacing of the source comb is filtered to 4.75 GHz and 23.75 GHz, respectively. According to the multi-beam interferences theory of FPC, the side-mode suppression rate of FPC schemes is in good agreement with our own theoretical results from 27 dB of a single FPC to 43 dB of paired FPCs. To maintain long-term stable operation and determine the absolute frequency mode number in the 23.75-GHz comb, the Pound-Drever-Hall (PDH) locking technology is utilized. Such stable tens GHz frequency combs have important applications in calibrating astronomical spectrographs with high resolution.

Key words: laser frequency comb, Fabry-Pérot cavity, high repetition rate, high resolution spectroscopy

中图分类号: (Fiber lasers)

42.55.Wd

42.60.Fc (Modulation, tuning, and mode locking) 42.62.Eh (Metrological applications; optical frequency synthesizers for precision spectroscopy)

侯磊, 韩海年, 王薇, 张龙, 庞利辉, 李德华, 魏志义. A 23.75-GHz frequency comb with two low-finesse filtering cavities in series for high resolution spectroscopy[J]. 中国物理B, 2015, 24(2): 24213-024213.

Hou Lei (侯磊), Han Hai-Nian (韩海年), Wang Wei (王薇), Zhang Long (张龙), Pang Li-Hui (庞利辉), Li De-Hua (李德华), Wei Zhi-Yi (魏志义). A 23.75-GHz frequency comb with two low-finesse filtering cavities in series for high resolution spectroscopy[J]. Chin. Phys. B, 2015, 24(2): 24213-024213.

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A 23.75-GHz frequency comb with two low-finesse filtering cavities in series for high resolution spectroscopy

A 23.75-GHz frequency comb with two low-finesse filtering cavities in series for high resolution spectroscopy

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