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# 55 W kilohertz-linewidth core- and in-band-pumped linearly polarized single-frequency fiber laser at 1950 nm.Opt Lett. 2020 Apr 15; 45(8):2343-2346.OL

Abstract

Based on core- and in-band-pumped polarization-maintaining ${{\rm Tm}^{3 + }}$Tm3+-doped single-cladding fiber (PM-TSF, the core diameter is 9 µm) by a 1610 nm fiber laser and a distributed Bragg reflector seed laser, a linearly polarized single-frequency fiber laser (LP-SFFL) at 1950 nm with an output power of 55.3 W and a laser linewidth of 6.95 kHz is demonstrated. The output beam qualities of ${M}_x^2$Mx2 and ${ M}_y^2$My2 are measured to be 1.01 and 1.03, respectively. The slope efficiency with respect to the launched pump power is 71.0%, in comparison with a theoretical quantum efficiency of 82.6%. A polarization-extinction ratio of 19 dB and an optical signal-to-noise ratio of 58 dB are obtained from the 1950 nm LP-SFFL. To the best of our knowledge, to date, this is the highest power of 2.0 µm SFFL output directly from a strict single-mode active fiber. Our experiment offers a promising solution to the current limitations of the high-performance fiber lasers at 2.0 µm, which is particularly essential for coherent detection.

### Authors

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Journal Article

eng

32287229

### Citation

Guan, Xianchao, et al. "55 W Kilohertz-linewidth Core- and In-band-pumped Linearly Polarized Single-frequency Fiber Laser at 1950 Nm." Optics Letters, vol. 45, no. 8, 2020, pp. 2343-2346.
Guan X, Yang C, Gu Q, et al. 55 W kilohertz-linewidth core- and in-band-pumped linearly polarized single-frequency fiber laser at 1950 nm. Opt Lett. 2020;45(8):2343-2346.
Guan, X., Yang, C., Gu, Q., Wang, W., Tan, T., Zhao, Q., Lin, W., Wei, X., Yang, Z., & Xu, S. (2020). 55 W kilohertz-linewidth core- and in-band-pumped linearly polarized single-frequency fiber laser at 1950 nm. Optics Letters, 45(8), 2343-2346. https://doi.org/10.1364/OL.388826
Guan X, et al. 55 W Kilohertz-linewidth Core- and In-band-pumped Linearly Polarized Single-frequency Fiber Laser at 1950 Nm. Opt Lett. 2020 Apr 15;45(8):2343-2346. PubMed PMID: 32287229.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - 55 W kilohertz-linewidth core- and in-band-pumped linearly polarized single-frequency fiber laser at 1950 nm. AU - Guan,Xianchao, AU - Yang,Changsheng, AU - Gu,Quan, AU - Wang,Weiwei, AU - Tan,Tianyi, AU - Zhao,Qilai, AU - Lin,Wei, AU - Wei,Xiaoming, AU - Yang,Zhongmin, AU - Xu,Shanhui, PY - 2020/4/15/entrez PY - 2020/4/15/pubmed PY - 2020/4/15/medline SP - 2343 EP - 2346 JF - Optics letters JO - Opt Lett VL - 45 IS - 8 N2 - Based on core- and in-band-pumped polarization-maintaining ${{\rm Tm}^{3 + }}$Tm3+-doped single-cladding fiber (PM-TSF, the core diameter is 9 µm) by a 1610 nm fiber laser and a distributed Bragg reflector seed laser, a linearly polarized single-frequency fiber laser (LP-SFFL) at 1950 nm with an output power of 55.3 W and a laser linewidth of 6.95 kHz is demonstrated. The output beam qualities of ${M}_x^2$Mx2 and ${ M}_y^2$My2 are measured to be 1.01 and 1.03, respectively. The slope efficiency with respect to the launched pump power is 71.0%, in comparison with a theoretical quantum efficiency of 82.6%. A polarization-extinction ratio of 19 dB and an optical signal-to-noise ratio of 58 dB are obtained from the 1950 nm LP-SFFL. To the best of our knowledge, to date, this is the highest power of 2.0 µm SFFL output directly from a strict single-mode active fiber. Our experiment offers a promising solution to the current limitations of the high-performance fiber lasers at 2.0 µm, which is particularly essential for coherent detection. SN - 1539-4794 UR - https://www.unboundmedicine.com/medline/citation/32287229/55_W_kilohertz_linewidth_core__and_in_band_pumped_linearly_polarized_single_frequency_fiber_laser_at_1950_nm_ DB - PRIME DP - Unbound Medicine ER -
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