High power UV pulsed laser with LMA tapered fiber

V. Roy; L. Desbiens; M. Deladurantaye; Y. Taillon

doi:10.1117/12.2543807

21 February 2020 High power UV pulsed laser with LMA tapered fiber

V. Roy, L. Desbiens, M. Deladurantaye, Y. Taillon

Proceedings Volume 11260, Fiber Lasers XVII: Technology and Systems; 112601W (2020) https://doi.org/10.1117/12.2543807
Event: SPIE LASE, 2020, San Francisco, California, United States

Abstract

A short-pulse Yb-doped fiber laser is reported to yield more than 50 W of UV light after single-pass second- and thirdharmonic generation using LBO crystals. The NIR laser generates ns-mJ pulses with average power exceeding 200 W after multipart fiber amplifier stages. The polarization-maintaining LMA tapered fiber used as the last amplifier stage features near diffraction-limited output, narrow linewidth and high polarization extinction ratio. Conversion efficiency from NIR to UV is found near 30%, with output pulse energy as high as 260 μJ for an oscillator pulse repetition frequency of 200 kHz. Generated UV light is seen close to diffraction limit, with M² factor measured < 1.3 both along and perpendicular to walk-off axis.

Citation Download Citation

V. Roy, L. Desbiens, M. Deladurantaye, and Y. Taillon "High power UV pulsed laser with LMA tapered fiber", Proc. SPIE 11260, Fiber Lasers XVII: Technology and Systems, 112601W (21 February 2020); https://doi.org/10.1117/12.2543807

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