2 kW single-mode fiber laser employing bidirectional-pump scheme |
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| Zhang Fan, Zhang Xinhai. 2 kW single-mode fiber laser employing bidirectional-pump scheme[J]. Opto-Electronic Engineering, 2017, 44(10): 953-956. doi: 10.3969/j.issn.1003-501X.2017.10.002 |
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| Authors: | Zhang Fan Zhang Xinhai |
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| Affiliation: | 1. Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China; 2. Key Laboratory of Optical Information Science and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, China |
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| Abstract: | A 2 kW single-mode fiber laser with two cascade home-made cladding light strippers (CLSs) has been demonstrated by employing bidirectional-pump scheme. 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 mm/400 mm. The beam quality M2≤1.2 and the spectral FWHM bandwidth is 4.34 nm. 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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| Keywords: | fiber laser high power stimulated Raman scattering power stability |
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