5 W ultra-low-noise 2 µm single-frequency fiber laser for next-generation gravitational wave detectors

Qian Zhang; Yubin Hou; Xi Wang; Weihua Song; Xu Chen; Wu Bin; Ju Li; Chunnong Zhao; Pu Wang

doi:10.1364/OL.402617

5 W ultra-low-noise 2 µm single-frequency fiber laser for next-generation gravitational wave detectors

Qian Zhang, Yubin Hou, Xi Wang, Weihua Song, Xu Chen, Wu Bin, Ju Li, Chunnong Zhao, Pu Wang

Physics

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

We demonstrated an ultra-low-noise polarization-maintaining (PM) single-frequency fiber laser at 2 µm. Both relative intensity noise (RIN) and frequency noise were improved by suppressing the pump source RIN using feedback control. After a two-stage Tm³⁺-doped PM fiber amplifier, the output power reached about 5 W, and the amplifier did not introduce any observable extra frequency noise. The frequency noise was less than 100 Hz/^√Hz above 13 Hz, which is comparable to the frequency noise of a typical seed laser of the Advanced LIGO high-power laser. The central wavelength was measured to be 1990.25 nm, with a polarization extinction ratio above 24 dB.

Original language	English
Pages (from-to)	4911-4914
Number of pages	4
Journal	Optics Letters
Volume	45
Issue number	17
DOIs	https://doi.org/10.1364/OL.402617
Publication status	Published - 1 Sep 2020

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abstract = "We demonstrated an ultra-low-noise polarization-maintaining (PM) single-frequency fiber laser at 2 µm. Both relative intensity noise (RIN) and frequency noise were improved by suppressing the pump source RIN using feedback control. After a two-stage Tm3+-doped PM fiber amplifier, the output power reached about 5 W, and the amplifier did not introduce any observable extra frequency noise. The frequency noise was less than 100 Hz/√Hz above 13 Hz, which is comparable to the frequency noise of a typical seed laser of the Advanced LIGO high-power laser. The central wavelength was measured to be 1990.25 nm, with a polarization extinction ratio above 24 dB.",

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AU - Zhang, Qian

AU - Hou, Yubin

AU - Wang, Xi

AU - Song, Weihua

AU - Chen, Xu

AU - Bin, Wu

AU - Li, Ju

AU - Zhao, Chunnong

AU - Wang, Pu

PY - 2020/9/1

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AB - We demonstrated an ultra-low-noise polarization-maintaining (PM) single-frequency fiber laser at 2 µm. Both relative intensity noise (RIN) and frequency noise were improved by suppressing the pump source RIN using feedback control. After a two-stage Tm3+-doped PM fiber amplifier, the output power reached about 5 W, and the amplifier did not introduce any observable extra frequency noise. The frequency noise was less than 100 Hz/√Hz above 13 Hz, which is comparable to the frequency noise of a typical seed laser of the Advanced LIGO high-power laser. The central wavelength was measured to be 1990.25 nm, with a polarization extinction ratio above 24 dB.

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5 W ultra-low-noise 2 µm single-frequency fiber laser for next-generation gravitational wave detectors

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