12 January 2018 2-kW single-mode fiber laser employing bidirectional-pump scheme
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2kW single-mode fiber laser with two cascade home-made cladding light strippers (CLSs) by employing bidirectionalpump scheme has been demonstrated. 2.009 kW signal power is obtained when pump power is 2.63 kW and the slope efficiency is 76.6%. Raman Stokes light is less than -47 dB at 2.009 kW even with a 10-m delivery fiber with core/inner cladding diameter of 20/400um. The beam quality M2≤1.2 and the spectral FWHM bandwidth is 4.34nm. There is no transverse mode instability and the output power stability of ±0.14% is achieved by special thermal management for a more uniform temperature distribution on the Yb-doped gain fiber.
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Fan Zhang, Fan Zhang, Wenyou Zheng, Wenyou Zheng, Pengyang Shi, Pengyang Shi, Xinhai Zhang, Xinhai Zhang, } "2-kW single-mode fiber laser employing bidirectional-pump scheme", Proc. SPIE 10619, 2017 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications, 106190G (12 January 2018); doi: 10.1117/12.2286036; https://doi.org/10.1117/12.2286036

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