Preliminary theoretical analysis of high-power Yb-doped fiber amplifiers tandem-pumped by short-wavelength fiber lasers

Hanshuo Wu; Hu Xiao; Hanwei Zhang; Wei Liu; Pu Zhou

doi:10.1117/12.2591137

28 February 2021 Preliminary theoretical analysis of high-power Yb-doped fiber amplifiers tandem-pumped by short-wavelength fiber lasers

Hanshuo Wu, Hu Xiao, Hanwei Zhang, Wei Liu, Pu Zhou

Author Affiliations +

Proceedings Volume 11781, 4th Optics Young Scientist Summit (OYSS 2020); 1178120 (2021) https://doi.org/10.1117/12.2591137
Event: Optics Frontier: Optics Young Scientist Summit, 2020, Ningbo, China

Abstract

Tandem pumping has been proved as an efficient approach to realizing high power Yb-doped fiber lasers and amplifiers. Currently, the most widely used pump laser is operating at 1018 nm, where the relatively small absorption cross section of Yb-doped fiber inevitably leads to long fiber length for sufficient pump absorption. The long active fiber, however, would significantly lower the stimulated Raman scattering threshold, limiting further power scaling. Therefore, theoretical analysis is carried out with the aim of shortening the Yb-doped fiber length in the tandem pumping scheme by employing pump lasers with shorter wavelength, i.e. 1007 nm and 1010 nm in this work, and the simulation results indicate that higher overall efficiency and better signal-to-noise ratio (SNR) could be obtained in a high-power fiber amplifier with these shortwavelength pump lasers. Further simulation suggests that fiber lasers operating at 1007 nm with high efficiency and high SNR can be obtained by optimizing the cavity parameters.

Citation Download Citation

Hanshuo Wu, Hu Xiao, Hanwei Zhang, Wei Liu, and Pu Zhou "Preliminary theoretical analysis of high-power Yb-doped fiber amplifiers tandem-pumped by short-wavelength fiber lasers", Proc. SPIE 11781, 4th Optics Young Scientist Summit (OYSS 2020), 1178120 (28 February 2021); https://doi.org/10.1117/12.2591137

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