Single-frequency linearly polarized Q-switched fiber laser based on Nb2GeTe4 saturable absorber

doi:10.1088/1674-1056/acad6d

中国物理B ›› 2023, Vol. 32 ›› Issue (7): 74203-074203.doi: 10.1088/1674-1056/acad6d

Single-frequency linearly polarized Q-switched fiber laser based on Nb₂GeTe₄ saturable absorber

Si-Yu Chen(陈思雨)¹, Hai-Qin Deng(邓海芹)¹, Wan-Ru Zhang(张万儒)¹, Yong-Ping Dai(戴永平)³, Tao Wang(王涛)¹, Qiang Yu(俞强)^1,3, Can Li(李灿)¹, Man Jiang(姜曼)^1,2, Rong-Tao Su(粟荣涛)^1,2,†, Jian Wu(吴坚)^1,‡, and Pu Zhou(周朴)¹

1 College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China;
2 Nanhu Laser Laboratory, National University of Defense Technology, Changsha 410073, China;
3 CAS Key Laboratory of Nanophotonic Materials and Devices&Key Laboratory of Nanodevices and Applications, i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO), Chinese Academy of Sciences(CAS), Suzhou 215123, China

收稿日期:2022-11-16 修回日期:2022-12-09 接受日期:2022-12-21 出版日期:2023-06-15 发布日期:2023-06-28
通讯作者: Rong-Tao Su, Jian Wu E-mail:surongtao@126.com;wujian15203@163.com
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 62275272) and the Training Program for Excellent Young Innovators of Changsha, China (Grant No. KQ2206003).

Single-frequency linearly polarized Q-switched fiber laser based on Nb₂GeTe₄ saturable absorber

1 College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China;
2 Nanhu Laser Laboratory, National University of Defense Technology, Changsha 410073, China;
3 CAS Key Laboratory of Nanophotonic Materials and Devices&Key Laboratory of Nanodevices and Applications, i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO), Chinese Academy of Sciences(CAS), Suzhou 215123, China

Received:2022-11-16 Revised:2022-12-09 Accepted:2022-12-21 Online:2023-06-15 Published:2023-06-28
Contact: Rong-Tao Su, Jian Wu E-mail:surongtao@126.com;wujian15203@163.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 62275272) and the Training Program for Excellent Young Innovators of Changsha, China (Grant No. KQ2206003).

摘要/Abstract

摘要： We report a single-frequency linearly polarized Q-switched fiber laser based on an Nb₂GeTe₄ saturable absorber (SA). The Nb₂GeTe₄ SA triggers passive Q-switching of the laser, and an un-pumped Yb-doped fiber together with a 0.08-nm-bandwidth polarization-maintaining fiber Bragg grating (FBG) acts as an ultra-narrow bandwidth filter to realize single-longitudinal-mode (SLM) oscillation. The devices used in the laser are all kept polarized, so as to ensure linearly polarized laser output. Stable SLM linearly polarized Q-switching operation at 1064.6 nm is successfully achieved, producing a laser with a shortest pulse width of 1.36 μ s, a linewidth of 28.4 MHz, a repetition rate of 28.3 kHz-95.9 kHz, and a polarization extinction ratio of about 30 dB. It is believed that the single-frequency linearly polarized pulsed fiber laser studied in this paper has great application value in gravitational wave detection, beam combining, nonlinear frequency conversion, and other fields.

关键词: fiber laser, saturable absorber, single-longitudinal-mode, pulsed laser

Abstract: We report a single-frequency linearly polarized Q-switched fiber laser based on an Nb₂GeTe₄ saturable absorber (SA). The Nb₂GeTe₄ SA triggers passive Q-switching of the laser, and an un-pumped Yb-doped fiber together with a 0.08-nm-bandwidth polarization-maintaining fiber Bragg grating (FBG) acts as an ultra-narrow bandwidth filter to realize single-longitudinal-mode (SLM) oscillation. The devices used in the laser are all kept polarized, so as to ensure linearly polarized laser output. Stable SLM linearly polarized Q-switching operation at 1064.6 nm is successfully achieved, producing a laser with a shortest pulse width of 1.36 μ s, a linewidth of 28.4 MHz, a repetition rate of 28.3 kHz-95.9 kHz, and a polarization extinction ratio of about 30 dB. It is believed that the single-frequency linearly polarized pulsed fiber laser studied in this paper has great application value in gravitational wave detection, beam combining, nonlinear frequency conversion, and other fields.

Key words: fiber laser, saturable absorber, single-longitudinal-mode, pulsed laser

中图分类号: (Lasers)

42.55.-f

42.55.Wd (Fiber lasers) 42.60.Gd (Q-switching) 42.65.Pc (Optical bistability, multistability, and switching, including local field effects)

Si-Yu Chen(陈思雨), Hai-Qin Deng(邓海芹), Wan-Ru Zhang(张万儒), Yong-Ping Dai(戴永平), Tao Wang(王涛), Qiang Yu(俞强), Can Li(李灿), Man Jiang(姜曼), Rong-Tao Su(粟荣涛), Jian Wu(吴坚), and Pu Zhou(周朴). Single-frequency linearly polarized Q-switched fiber laser based on Nb₂GeTe₄ saturable absorber[J]. 中国物理B, 2023, 32(7): 74203-074203.

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Single-frequency linearly polarized Q-switched fiber laser based on Nb₂GeTe₄ saturable absorber

Single-frequency linearly polarized Q-switched fiber laser based on Nb₂GeTe₄ saturable absorber

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