Bismuth‐doped fiber Q‐switcher in erbium‐doped fiber laser cavity
Pei Zhang, K. Dimyati, Mustafa Mohammed Najm, Bilal Nizamani, Mukul Chandra Paul, Shyamal Das, Anirban Dhar, Mrinmay Pal, M. Yasin, Sulaiman Wadi Harun
Abstract
Abstract We propose a simple design of all‐fiber Q‐switched erbium‐doped fiber laser (EDFL). The laser is passively Q‐switched by splicing bismuth‐doped fiber into a ring cavity. The design has been experimentally demonstrated at the emission wavelength of 1560.48 nm. A single‐mode Q‐switched pulse with pulse duration of 1.18 μs and pulse energy of 15.6 nJ was obtained with 980 nm pump power of 178 mW. Stable and typical Q‐switched pulses were achieved at the repetition rate changing from 63.3 to 94.6 kHz. To the best of our knowledge, it is the first time to demonstrate bismuth‐doped fiber as an effective saturable absorber for erbium‐doped fiber laser.