Affiliation:
1. Department of Intelligence and Automation, Taiyuan University , Taiyuan 030032, China
Abstract
This paper presents a self-coherent optical feedback system that achieves resonance between the external cavity mode and the relaxation oscillation frequency of distributed feedback (DFB) laser and the repetition frequency of Fabry–Perot (FP) laser, all in an effort to achieve optical feedback self-locking. Results using this system show that for FP lasers, feedback is able to reduce the 3 dB radio frequency linewidth from 2 MHz to 600 kHz. In the case of DFB lasers, an electric frequency comb with an external cavity repetition rate of 17.25 MHz is achieved. This research presents a significant step toward the improvement of the performance of quantum dot lasers in optical communication systems.
Funder
The Natural Youth Science Foundation of Shanxi Province
Science and Technology Innovation Project of Shanxi Higher Education Institution
Science and Technology Innovation Plan for Colleges and Universities in Shanxi Province
The Science and Technology Innovation Project in Higher School in Shanxi
Teaching Reform and Innovation Project of Education Department of Shanxi Province
Teaching Reform and Innovation Project of Taiyuan University
Subject
General Physics and Astronomy
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