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

Year 2022, Issue: 051, 73 - 80, 31.12.2022

Thoalfeqar Ali Razaq Alyasırı , Aşkınnur Aşkın , Bünyamin Kaya , Şerif Ali Sadık , Fırat Ertaç Durak , Ahmet Altuncu

Abstract

The work presented in this study is focused on developing a widely wavelength tunable Q-switched pulsed erbium doped fiber ring laser (EDFRL) source operating in microsecond regime in Telecom wavelength spectrum of 1.55 μm ( C and L bands ). A commercial Gallium arsenide (GaAs) based microchip saturable absorber (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

Supporting Institution

Kütahya Dumlupınar Üniversitesi

Project Number

2020-20

Thanks

This work was supported by Kütahya Dumlupınar University (Project No.DPU.2020-20).

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