Narrow-linewidth passively Q-switched fibre laser based on microsphere resonator |
| |
| Authors: | Yajie Wu Fangjie Wang Jiulin Yang Shutong Wang Shouhuan Zhou |
| |
| Affiliation: | 1. College of Electronics and Information Engineering, Sichuan University, Chengdu, People’s Republic of China;2. College of Electronics and Information Engineering, Sichuan University, Chengdu, People’s Republic of China;3. North China Research Institute of Electro-Optics, Beijing, People’s Republic of China |
| |
| Abstract: | We experimentally demonstrate a stable narrow-linewidth passively Q-switched fibre laser based on a microsphere resonator (MSR) and graphene saturable absorber (SA). The MSR made by the arc discharge method has the characteristics of easy fabrication, broad free spectral range (FSR) and flexibility. And it acts as a narrow band-pass filter to ensure narrow-linewidth operation. A stable passively Q-switched pulse with 0.016?nm narrow spectral linewidth is successfully achieved. The output pulse has the pulse width of 5.2 µs, repetition frequency of 28 kHz and high signal to noise ratio (SNR) of ～60?dB. The results demonstrate that our works may provide an effective way to achieve narrow-linewidth pulsed fibre lasers. |
| |
| Keywords: | Fiber laser Q-switched narrow linewidth |
|
|
