Passive Q-Switching of an Erbium-Doped Fiber Laser Using a Tin Phthalocyanine-Based Saturable Absorber in the C-Band Region

Abstract

Fiber lasers have drawn a lot of interest because of their excellent beam quality, adaptability, and effectiveness in a range of applications. A development of reliable and effective saturable absorbers for Q-switching, which enables the generation of pulsed laser output, is an essential factor in developing fiber laser technology. This study explores the potential of tin phthalocyanine as a saturable absorber for passive Q-switching in a fiber laser system. The goal of this study is to determine how effectively this material produces steady Q-switched pulses. The process includes incorporating SnPC with polyvinyl alcohol to create a saturable absorber film, which is subsequently incorporated into a passive fiber laser configuration. Q-switched pulses are successfully recorded after increasing the pump power to 84.5 mW, and they maintain stable up to 180.4 mW. These stable Q-switched pulses work at a wavelength of 1556.8 nm. The key performance measures include a maximum repetition rate of 98.1 kHz, a minimum pulse-to-pulse interval of 11.8 µs, and a peak pulse energy of 93.3 nJ.