High-power and pulse energy picosecond narrow linewidth laser system based on tapered fiber amplifier for second harmonic generation

Andrey Petrov; Grigory Mikhailovsky; Alexander Gorbatchev; Maxim Odnoblyudov; Mikhail Kozlyakov; Joona Rissanen; Regina Gumenyuk; Valery Filippov

doi:10.1117/12.2577634

5 March 2021 High-power and pulse energy picosecond narrow linewidth laser system based on tapered fiber amplifier for second harmonic generation

Andrey Petrov, Grigory Mikhailovsky, Alexander Gorbatchev, Maxim Odnoblyudov, Mikhail Kozlyakov, Joona Rissanen, Regina Gumenyuk, Valery Filippov

Author Affiliations +

Proceedings Volume 11665, Fiber Lasers XVIII: Technology and Systems; 116651D (2021) https://doi.org/10.1117/12.2577634
Event: SPIE LASE, 2021, Online Only

Abstract

We present the results of compact and cost-efficient high-power and energy laser system based on a picosecond gain-switched DFB laser diode operating at a wavelength of 1064 nm with spectral linewidth less than 0.1 nm and pulse duration of 50 ps and tapered double clad fiber (T-DCF) amplifier. The unique properties of T-DCF as efficient amplification of low power seed signal and suppressed threshold of nonlinearities allow achievement of both high peak power of 170 kW and pulse energy of 9 μJ at pulse repetition rate of 10 MHz while maintaining spectrum linewidth as narrow as 0.1 nm. High average output power of 150 W was obtained with slightly broader laser linewidth. We also demonstrate second harmonic generation with over 30 W at 532 nm wavelength with conversion efficiency of 38%. These results make MOPA system based on gain-switched DFB laser diode and T-DCF amplifier an attractive source for material processing and sensing application including time resolved Raman spectroscopy.

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Andrey Petrov, Grigory Mikhailovsky, Alexander Gorbatchev, Maxim Odnoblyudov, Mikhail Kozlyakov, Joona Rissanen, Regina Gumenyuk, and Valery Filippov "High-power and pulse energy picosecond narrow linewidth laser system based on tapered fiber amplifier for second harmonic generation", Proc. SPIE 11665, Fiber Lasers XVIII: Technology and Systems, 116651D (5 March 2021); https://doi.org/10.1117/12.2577634

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