Supercontinuum generation in a dual-wavelength seeded ytterbium-doped fiber amplifier

Jing-sui Li; Bo Li; Sheng-ping Chen

doi:10.1117/12.2627424

28 March 2022 Supercontinuum generation in a dual-wavelength seeded ytterbium-doped fiber amplifier

Jing-sui Li, Bo Li, Sheng-ping Chen

Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 12169D7 (2022) https://doi.org/10.1117/12.2627424
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China

Abstract

Supercontinuum (SC) generation in ytterbium-doped fiber amplifiers usually use single-wavelength laser seeds, which leads to the supercontinuum with strong Raman peak and unsatisfactory flatness. In this paper, a 1030 nm and 1064 nm dual-wavelength seeded ytterbium-doped fiber amplifier (YDFA) is demonstrated for the first time to generate a supercontinuum, the Raman peaks generated by 1030 nm and 1064 nm pulse lasers fill in the dips of each other, which is conducive to the flattening of the spectrum. The dual-wavelength seeded amplifier exhibits high spectral flatness with an 8 dB spectral bandwidth from 1 μm to 2 μm at the average output power of 1.92 W. The influence of the power ratio of 1030nm and 1064nm pulse laser seed and the impact of different inter-pulse time-delay of the two pulse lasers on the supercontinuum are investigated experimentally. The experimental results indicate that when the power ratio of 1030 nm and 1064 nm pulse lasers is 10:1, the flatness of supercontinuum has the best performance, which is determined by the absorption/radiation cross section of ytterbium ions, and the synchronous amplification of dual-wavelength pulsed seed lasers is more conductive to the broadening and flattening of the supercontinuum, as compared with the case of one seed laser. This work provides a new way to realize high flatness supercontinuum in YDFA.

Citation Download Citation

Jing-sui Li, Bo Li, and Sheng-ping Chen "Supercontinuum generation in a dual-wavelength seeded ytterbium-doped fiber amplifier", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 12169D7 (28 March 2022); https://doi.org/10.1117/12.2627424

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KEYWORDS

Pulsed laser operation

Raman spectroscopy

Supercontinuum generation

Amplifiers

Fiber amplifiers

Fiber lasers

Signal generators

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