Frequency Sweep Linearization for Semiconductor Laser Using a Feedback Loop Based on Amplitude-Frequency Response

J. Zhu, Ligong Chen
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引用次数: 1

Abstract

A scheme of frequency sweep linearization of semiconductor lasers using a feed-back loop based on amplitude-frequency response is demonstrated in this paper. The beat frequency signal is obtained by self-heterodyne detection. The frequency changes are converted to the envelope of beat frequency signal after amplitude-frequency response. The active frequency sweep linearization is realized by feeding envelope deviations back to the drive currents of the lasers by a feedback loop. A simulation model is built to verify this scheme by Simulink. This scheme does not need high-performance, expensive lasers, complex linearization or tedious post-processing processes, which are of great significance for related applications.
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基于幅频响应反馈环的半导体激光器扫频线性化
本文提出了一种基于幅频响应的半导体激光器扫频线性化方案。拍频信号是通过自外差检测获得的。频率变化在幅度频率响应之后被转换为拍频信号的包络。有源频率扫描线性化是通过反馈回路将包络偏差反馈回激光器的驱动电流来实现的。通过Simulink建立仿真模型对该方案进行验证。该方案不需要高性能、昂贵的激光器、复杂的线性化或繁琐的后处理过程,这对相关应用具有重要意义。
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