In this work, monolithic mode-locked GaSb-based lasers at 1.7 µm emission wavelength with heterodyne measurement of the frequency comb are presented. Mode-locking operation was confirmed by measuring the optical beatnote at the round-trip frequency of 9.56 GHz and analysing the frequency comb. Mode-locking operation occurred from 0.1 to 3.3 V reverse bias voltages at the absorber section and driving currents from 160 to 400 mA at the laser section with a minimum beatnote width of 6.6 kHz. The frequency comb spans over 13 nm with a mode spacing of 0.10 nm, measured by heterodyne-detection with a distributed feedback laser.

中文翻译：

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1.7 µm单片锁模GaSb基激光器的外差检测频率梳研究

在这项工作中，提出了具有频率梳外差测量的 1.7 µm 发射波长的单片锁模 GaSb 基激光器。通过在 9.56 GHz 的往返频率下测量光学拍音并分析频率梳来确认锁模操作。锁模操作发生在吸收器部分的 0.1 至 3.3 V 反向偏置电压和激光器部分的 160 至 400 mA 驱动电流，最小拍音宽度为 6.6 kHz。频率梳跨度超过 13 nm，模式间距为 0.10 nm，通过分布式反馈激光器的外差检测进行测量。