WAVELENGTH TUNABLE PASSIVELY Q-SWITCHED FIBER RING LASER USING GALLIUM ARSENIDE BASED MICROCHIP SATURABLE ABSORBER

Authors : Thoalfeqar Ali Razaq ALYASIRI, Aşkınnur AŞKIN, Bünyamin KAYA, Şerif Ali SADIK, Fırat Ertaç DURAK, Ahmet ALTUNCU

Pages : 73-80

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Publication Date : 2022-12-31

Article Type : Research Paper

Abstract :The work presented in this study is focused on developing a widely wavelength tunable Q-switched pulsed erbium doped fiber ring laser insert ignore into journalissuearticles values(EDFRL); source operating in microsecond regime in Telecom wavelength spectrum of 1.55 μm insert ignore into journalissuearticles values( C and L bands );. A commercial Gallium arsenide insert ignore into journalissuearticles values(GaAs); based microchip saturable absorber insert ignore into journalissuearticles values(SA); is used in the proposed EDFRL configuration to passively initiate Q-switching for stable pulse generation. Unless low damage threshold of the commercial GaAs based SA and non-optimized cavity length and losses, sufficiently stable pulse trains were obtained for a wide wavelength tuning range of 50 nm from 1520 nm to 1570 nm with high repeatability and long-term stability. The Q-switched output pulses of the proposed EDFRL have output average powers varying from +0.65 dBm to +1.53 dBm, the pulse widths varying from 4.27 μs to 7.16 μs and the repetition rates varying from 51.51 kHz to 31.42 kHz for different tuning wavelengths.
Keywords : fiber laser, saturable absorber, wavelength tunable, q switched