Nonlinearity compensation in laser frequency sweep with optical feedback.

IF 3.3 2区物理与天体物理 Q2 OPTICS

Optics letters Pub Date : 2026-10-01 DOI:10.1364/OL.612571

Shiwei Deng, Qinghao Hu, Yubo Zhao, Fangfang Du, Zhihui Liu, Jing Li, Qiulin Tan, Rui Feng, Xijing Zhu

引用次数: 0

Abstract

Frequency-sweep nonlinearity limits the resolution and stability of coherent optical sensing systems. We present a simple optical-feedback-based method that uses the beat signal from a stationary target to characterize the instantaneous sweep rate and iteratively predistort the frequency-tuning waveform, without an auxiliary interferometer or external frequency reference. Experiments with a PZT-tuned 1064 nm frequency-swept microchip laser reduce beat-frequency variance to 0.049 kHz² (>99% suppression) and compress the overall spectral width by more than 60%, demonstrating effective source-level linearization in both sweep directions.

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光反馈激光扫频非线性补偿。

扫频非线性限制了相干光学传感系统的分辨率和稳定性。我们提出了一种简单的基于光反馈的方法，该方法使用来自静止目标的节拍信号来表征瞬时扫描速率并迭代地预扭曲频率调谐波形，而无需辅助干涉仪或外部频率参考。利用pzt调谐的1064 nm扫频微芯片激光器进行实验，将热频方差降低到0.049 kHz2（抑制率为99%），并将总谱宽压缩60%以上，在两个扫频方向上都证明了有效的源级线性化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics letters 物理-光学

CiteScore

6.60

自引率

8.30%

发文量

2275

审稿时长

1.7 months

期刊介绍： The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.