Infrared and Laser Engineering, Volume. 51, Issue 6, 20220400(2022)
Ultra-low noise 2 μm high power single-frequency fiber laser for next generation gravitational-wave detector (Invited)
An acoustic optical modulator (AOM) laser power feedback loop was used to suppress the intensity noise of the pump laser, and the intensity noise reduction of more than 5 dB (@f=1 Hz-50 kHz) was obtained. The relative intensity noise of the 2 μm single-frequency fiber laser obtained 3-15 dB suppression (@f=1 Hz-50 kHz), and the intensity noise level was close to the detector limit (@f=40-400 Hz). Meanwhile, its frequency noise is also suppressed by 3-8.4 dB. After the two-stage Thulium-doped polarization-preserving fiber amplifier, the output power of the 2 μm single-frequency laser was increased to about 5.2 W with almost no significant increase in frequency noise, and the frequency noise levels were all at 100 Hz/
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Yubin Hou, Xiangwen Lu, Qian Zhang, Pu Wang. Ultra-low noise 2 μm high power single-frequency fiber laser for next generation gravitational-wave detector (Invited)[J]. Infrared and Laser Engineering, 2022, 51(6): 20220400
Category: Special issu
Received: May. 6, 2022
Accepted: --
Published Online: Dec. 20, 2022
The Author Email: Zhang Qian (zhangqian09236@bjut.edu.cn)