316 W high-brightness narrow-linewidth linearly-polarized all-fiber single-frequency laser at 1950 nm
- 21 October 2021
- journal article
- research article
- Published by IOP Publishing in Applied Physics Express
- Vol. 14 (11), 112004
- https://doi.org/10.35848/1882-0786/ac2e9b
Abstract
Based on a three-cascaded all-fiber master-oscillator power-amplifier configuration, a 1950-nm high-brightness narrow-linewidth linearly-polarized single-frequency fiber laser with an output power of 316 W and a laser linewidth of 8.4 kHz is demonstrated experimentally. With the employment of a round-square-coiling fiber scheme and a 20/300-μm-core/cladding polarization-maintaining Tm3+-doped double-cladding fiber, the bending loss of LP11 mode is improved, thus leading the good beam quality, Mx2=1.19 and My2=1.17, herein. Additionally, a polarization-extinction ratio of 17.1 dB and an optical signal-to-noise ratio of >63 dB separately confirm good maintenance of linear polarization and adequate suppression of amplified spontaneous emission in the power amplificationKeywords
Funding Information
- Key-Area Research and Development Program of Guangdong Province (2018B090904001)
- Major Program of the National Natural Science Foundation of China (61790582)
- NSFC (61635004 and 51772101)
- Fundamental Research Funds for the Central Universities (D2201240)
- Leading Talents of Science and Technology Innovation of Guangdong Special Support Plan Program (B2200250)
- Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01X137)
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