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Proceedings Paper

High power UV pulsed laser with LMA tapered fiber
Author(s): V. Roy; L. Desbiens; M. Deladurantaye; Y. Taillon
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Paper 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.

Paper Details

Date Published: 21 February 2020
PDF: 6 pages
Proc. SPIE 11260, Fiber Lasers XVII: Technology and Systems, 112601W (21 February 2020); doi: 10.1117/12.2543807
Show Author Affiliations
V. Roy, INO (Canada)
L. Desbiens, INO (Canada)
M. Deladurantaye, INO (Canada)
Y. Taillon, INO (Canada)

Published in SPIE Proceedings Vol. 11260:
Fiber Lasers XVII: Technology and Systems
Liang Dong, Editor(s)

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