Dual-wavelength all-fiber Q-switched fiber laser using bismuth-doped fiber as saturable absorber

A passively Q-switched all-fiber laser is demonstrated using a 10-cm-long bismuth-doped fiber (BDF) as a saturable absorber (SA). The dual-wavelength operation was obtained due to the nonlinear effect inside the fabricated BDF, which has a high germanium content. Stable Q-switched pulses were obtain...

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Bibliographic Details
Published inOptoelectronics letters Vol. 20; no. 3; pp. 147 - 151
Main Authors Ghosh, Aruna, Diblawe, Abdulkadir Mukhtar, Samanta, Uttam Kumar, Yasin, Moh, Harun, Sulaiman Wadi, Paul, Mukul Chandra
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.03.2024
Springer Nature B.V
Subjects
Absorbers
Bismuth
Doped fibers
Fiber lasers
Germanium
Laser applications
Lasers
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Pulse duration
Q switched lasers
A
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Summary:A passively Q-switched all-fiber laser is demonstrated using a 10-cm-long bismuth-doped fiber (BDF) as a saturable absorber (SA). The dual-wavelength operation was obtained due to the nonlinear effect inside the fabricated BDF, which has a high germanium content. Stable Q-switched pulses were obtained at the dual synchronous wavelengths of 1 530.1 nm and 1 531.1 nm. When the pump power is tuned from 105.3 mW to 191.0 mW, the repetition rate can be varied from 82.6 kMz to 117.6 kHz. The maximum pulse energy and average output power were 83.4 nJ and 9.8 mW, respectively while the minimum pulse width was 8.5 µs at the maximum pump power of 191.0 mW. Our results indicate that BDF could be a promising alternative optical modulator for pulsed fiber laser application.
ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-024-3085-6