Abstract
We generated gain-switched pulses via electrical pulse excitations in a 1270 nm distributed feedback (DFB) laser diode (LD) with a direct-modulation bandwidth of 30 GHz. The measurements revealed short-pulse widths of 5.3 and 8.8 ps with and without chirp compensation, via a single-mode optical fiber. The 5.3 ps pulses exhibited a spectral width of 0.40 nm (spectral bandwidth of 71 GHz), yielding a time–bandwidth product of 0.38. Although the gain-switched pulses in DFB LDs inherently contain linear and nonlinear chirp, optimized pumping conditions enable generation of nearly transform-limited ps pulses after linear chirp compensation.
© 2023 Optica Publishing Group
Full Article | PDF ArticleMore Like This
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)
Yuta Kusama, Yuichiro Tanushi, Masami Yokoyama, Ryosuke Kawakami, Terumasa Hibi, Yuichi Kozawa, Tomomi Nemoto, Shunichi Sato, and Hiroyuki Yokoyama
Opt. Express 22(5) 5746-5753 (2014)
Weiao Qi, Jiaqi Zhou, Xinru Cao, Zhi Cheng, Sha Li, Huawei Jiang, Shuzhen Cui, and Yan Feng
Opt. Lett. 48(7) 1698-1701 (2023)