Open AccessHigh-quality frequency-modulated continuous-wave generation based on a semiconductor laser subject to cascade-modulated optical injection
Author(s) -
Yang Jin,
Xiaohui Lin,
Zheng-Mao Wu,
Zaifu Jiang,
DianZou Yue,
Wei Yang,
Li Fan,
Guang-Qiong Xia
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.434160
Subject(s) - optics , cascade , phase noise , continuous wave , frequency modulation , phase modulation , injection locking , bandwidth (computing) , semiconductor laser theory , photonics , electro optic modulator , laser , modulation (music) , distributed feedback laser , materials science , optoelectronics , physics , optical modulator , telecommunications , computer science , acoustics , chemistry , chromatography
Frequency-modulated continuous-wave (FMCW) can be acquired by using a distributed feedback semiconductor laser (DFB-SL) operating at period-one (P1) oscillation under an optical injection modulated by a Mach-Zehnder modulator (MZM). In this work, through introducing another MZM to establish cascade-modulated optical injection, an improved photonic scheme for generating high-quality FMCW is proposed and experimentally demonstrated. The experimental results indicate that, under appropriate injection parameters, the central frequency of the generated FMCW is widely tunable, and the bandwidth is larger than that obtained under a single MZM modulation. Further introducing optical feedback for suppressing the phase noise, the frequency comb contrast of the generated FMCW can be improved obviously.