Passively Q-switched fiber laser with single and double wavelength switching based on parallel FBGs

We proposed a passively Q-switched fiber laser with switchable wavelength based on two parallel fiber Bragg gratings. By increasing the input power, a single wavelength with a center wavelength of 1545.63 nm and dual wavelengths with a center wavelength of 1545.63 nm and 1553.60 nm can be obtained r...

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Bibliographic Details
Published in:Optik (Stuttgart) 2021-09, Vol.241, p.166973, Article 166973
Main Authors: Guo, Shuying, Zhang, Ailing, Pan, Honggang
Format: Article
Language:English
Subjects:
FBG
Fiber laser
Multi-wavelength
Passively Q-switched
Saturable absorber
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Summary:We proposed a passively Q-switched fiber laser with switchable wavelength based on two parallel fiber Bragg gratings. By increasing the input power, a single wavelength with a center wavelength of 1545.63 nm and dual wavelengths with a center wavelength of 1545.63 nm and 1553.60 nm can be obtained respectively. The wavelength spacing of the dual wavelengths is 8.17 nm, and the maximum repetition frequency of Q-switching is 24.27 kHz, and the narrowest pulse width is 5.48 ms. The combination of parallel fiber grating and erbium-ytterbium co-doped fiber (EYDF) saturable absorber provides a simple and feasible method to obtain stable (single and double wavelength switching) passively Q-switched pulses.
ISSN:0030-4026
1618-1336
DOI:10.1016/j.ijleo.2021.166973