Add to BibSonomy
Abstract
We show that an optimum mode-locking state with low relative intensity noise (RIN) can be identified by continuous broadening of an optical spectrum in a stretched-pulse fiber laser based on nonlinear polarization rotation (NPR). Under the premise of keeping the overall spectral shape unchanged, either gradually increasing the pump power or unidirectionally adjusting the polarization controller (PC) can effectively reduce RIN as the optical spectral bandwidth broadens. The optimized intensity noise performance of the laser can be attributed to the increased pulse energy and reduced intra-cavity net dispersion. Moreover, the integrated RIN will further decrease as the maximum 3-dB bandwidth extends. In our experiment, the detected minimum integrated rms RIN is below 0.003% (from 100 Hz to 100 kHz). Our experimental results find that the absolute spectral width is not a necessary key condition for obtaining low RIN mode-locked laser, whereas it may help understand and design versatile low-noise ultrafast laser sources.
© 2023 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Dohyun Kim, Shuangyou Zhang, Dohyeon Kwon, Ruoyu Liao, Yifan Cui, Zhigang Zhang, Youjian Song, and Jungwon Kim
Opt. Lett. 42(20) 4095-4098 (2017)
Weixi Li, Zinan Huang, Xiangpeng Xiao, Zhijun Yan, Siyu Luo, Yingxiong Song, Chen Jiang, Yunqi Liu, and Chengbo Mou
Opt. Lett. 48(10) 2676-2679 (2023)
Zhaoheng Liang, Wei Lin, Wenlong Wang, Xu Hu, Minjie Pan, Yiheng Fan, Chiyi Wei, Luyi Wang, Guowu Tang, Xiaoming Wei, and Zhongmin Yang
Opt. Lett. 49(2) 403-406 (2024)