1 kW cw fiber-coupled diode laser with enhanced brightness

Garre-Werner, Guillermo; Montiel-Ponsoda, J.; Raab, Volker; Safont, Gemma; Brée, Carsten; Radziunas, Mindaugas; Cojocaru, C.; Staliūnas, Kęstutis

doi:10.1117/12.2546086

Cited by 1 publication

(1 citation statement)

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“…The brightness of the pump source can also be improved through polarization beam combining and wavelength beam combining technologies. In the category of incoherent beam combining, with the help of the dependence between spectrum and polarization with the half wave plate made of birefringent crystal, polarization beam combining can be used twice at most [3]. But the beam combining efficiency is lower than 90%.…”

Section: Introductionmentioning

confidence: 99%

650W dual-wavelength locked high brightness diode laser pump source

Chen¹,

Li²,

Shi³

et al. 2023

Components and Packaging for Laser Systems IX

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On last year's SPIE conference, BWT has launched a pump source in weight around 500g, which was locked at 976nm, output 420W from a 135μm diameter and NA 0.22 fiber. In order to meet the need of higher output power pumping of fiber lasers, BWT has achieved 650W output from a 135μm diameter and NA0.22 fiber with a diode laser locked at 969nm and 982nm based on dense spatial beam combination (DSBC) and wavelength beam combination. In the absorption spectrum of Yb 3+ ions, 969nm and 982nm have lower absorption coefficients than 976nm,. The active fiber with the same doping concentration will produce less heat accumulation per unit length, which has an obvious effect on improving the TMI threshold (transverse mode instability) and increasing the single-mode fiber laser power. With the enhancement of pump source brightness and the improvement of active fiber doping process and wave-guide structure, the power of single mode fiber laser directly pumped by diode laser is expected to exceed 10kW in the future.

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Section: Introductionmentioning

confidence: 99%