Large-mode-area tapered fibers for generation of high energy ultrashort pulses from nonlinear compression

Vincent Roy; Louis Desbiens; Mathieu Boivin; Yves Taillon

doi:10.1117/12.2506909

7 March 2019 Large-mode-area tapered fibers for generation of high energy ultrashort pulses from nonlinear compression

Vincent Roy, Louis Desbiens, Mathieu Boivin, Yves Taillon

Proceedings Volume 10897, Fiber Lasers XVI: Technology and Systems; 1089729 (2019) https://doi.org/10.1117/12.2506909
Event: SPIE LASE, 2019, San Francisco, California, United States

Abstract

Nonlinear compression for generation of high energy ultrashort pulses using an Yb-doped large mode area tapered fiber is reported. Suppression of higher-order modes is enhanced compared with large mode area stepindex fibers owing to the depressed-index inner cladding and confined doping. Average power and pulse energy exceeding respectively 90 W and 50 μJ were achieved after multipart fiber amplifier stages, with final-stage amplifier gain larger than 40 dB. Pulse compression using a chirped volume Bragg grating later yields durations as short as 1 ps and peak powers exceeding 10 MW, with near diffraction-limited output. Pulse-on-demand and burst modes are straightforward, given the master oscillator/power amplifier scheme, with pulse generation first initiated from direct current modulation of a seed laser diode while subsequent external phase modulation and spectral selection yield pulse trains/bursts following digitized arbitrary waveforms. The proposed scheme is considered to be relevant for laser materials processing.

Citation Download Citation

Vincent Roy, Louis Desbiens, Mathieu Boivin, and Yves Taillon "Large-mode-area tapered fibers for generation of high energy ultrashort pulses from nonlinear compression", Proc. SPIE 10897, Fiber Lasers XVI: Technology and Systems, 1089729 (7 March 2019); https://doi.org/10.1117/12.2506909

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