基于外腔弱分布反馈的超窄线宽垂直腔面发射激光器。

Ultra-narrow linewidth vertical-cavity surface-emitting laser based on external-cavity weak distributed feedback.

作者信息

Jiang Lidan, Lan Tianyi, Dang Laiyang, Li Jiali, Huang Ligang, Shi Leilei, Yin Guolu, Zhu Tao

出版信息

Opt Express. 2022 Oct 10;30(21):37519-37525. doi: 10.1364/OE.472383.

Abstract

We demonstrate an ultra-narrow linewidth vertical-cavity surface-emitting laser (VCSEL) based on external-cavity weak distributed feedback from Rayleigh backscattering (RBS). A single longitudinal mode VCSEL with the linewidth as narrow as 435 Hz and a contrast of 55 dB are experimentally achieved by RBS fiber with a feedback level of RBS signal of -27.6 dB. By adjusting the thermal resistance of the VCSEL from 4.5 kΩ to 7.0 kΩ, the laser wavelength can be tuned from 1543.324 nm to 1542.06 nm with a linear tuning slope of -0.506 nm/kΩ. In the tuning process, the linewidth fluctuates in the range of 553-419 Hz.

摘要

我们展示了一种基于瑞利背散射（RBS）的外腔弱分布反馈的超窄线宽垂直腔面发射激光器（VCSEL）。通过具有 -27.6 dB 的 RBS 信号反馈水平的 RBS 光纤，实验实现了线宽窄至 435 Hz 且对比度为 55 dB 的单纵模 VCSEL。通过将 VCSEL 的热阻从 4.5 kΩ 调整到 7.0 kΩ，激光波长可从 1543.324 nm 调谐到 1542.06 nm，线性调谐斜率为 -0.506 nm/kΩ。在调谐过程中，线宽在 553 - 419 Hz 范围内波动。