High Power Laser and Particle Beams, Volume. 34, Issue 6, 061002(2022)
Experimentation of 260 W wavelength stabilized fiber-coupled diode laser pumping model
As pump station, fiber-coupled diode laser source is one of the key elements of fiber laser, its performance restricts the output level of the fiber laser directly. Aimed at a multi-mode fiber of 105 μm core diameter and 0.22 numerical aperture, a 260 W-level high-brightness fiber-coupled diode laser model based on single-emitter-COS (chip on submount) is developed. In the design, volume Bragg grating (VBG) is used to control the spectrum of the corresponding emitter at a narrow bandwidth (about 0.5 nm), and the beam shaping technologies, polarization multiplexing and aspherical lens are taken to couple the 18 LD beams into the multi-mode fiber. The experiment indicates that, the beam shaping system can couple the 18 LD beams into the fiber, and the output power can achieve 264 W, with the E-O efficiency of 52% at operation current 18 A. Simultaneously, the central wavelength of the model is locked at 975.92 nm with an FWHM of 0.51 nm. This design offers a feasible approach to the spectral-controlled fiber-coupled diode laser. The engineered fiber-coupled diode laser system can be widely used in fiber pumping and many other areas.
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Hualing Wu, Jun Lei, Linhui Guo, Chengqian Wang, Pengfei Xie, Yuxuan Liu, Yonggang Zhang, Xin’gang Cheng, Xiaoxiao Li, Wenqiang Lü, Zhao Wang, Songxin Gao. Experimentation of 260 W wavelength stabilized fiber-coupled diode laser pumping model[J]. High Power Laser and Particle Beams, 2022, 34(6): 061002
Category: High Power Laser Physics and Technology
Received: Dec. 12, 2021
Accepted: --
Published Online: Jun. 2, 2022
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