红外与激光工程, 2020, 49 (12): 20201054, 网络出版: 2021-01-14
2 μm GaSb基被动锁模激光器重复频率变化的研究（特邀）
Repetition frequency variation of a 2 μm GaSb-based passively mode-locked laser （Invited）
图 & 表
图 1. L -I curves of the tested laser at different temperatures when V a=0 V
当V a=0 V，激光器在不同温度下出射光功率随注入电流变化的曲线
Fig. 1.
图 2. A typical RF spectrum at 20 °C under the bias condition of I g=180 mA, V a=−2 V. The upper inset shows the RF signal at the fundamental repetition rate, while the lower inset shows the pulse train
在20 ℃时的一个典型的RF谱线（I g=180 mA, V a=−2 V）。插图（上）给出了放大的基频RF信号，插图（下）则给出了光脉冲序列
Fig. 2.
图 3. Optical spectrum under the same bias condition as that in Fig. 2 (I g=180 mA, V a=−2 V)
在与图2 相同偏压条件（I g=180 mA, V a=−2 V）下的光谱
Fig. 3.
图 4. (a) Repetition frequency as a function of I g ; (b) Corresponding spectra change at three different temperature ( V a was fixed at −1 V)
(a) 三个不同温度下当V a被设定在−1 V保持不变时，被测激光器重复频率随I g的变化。(b) 对应的光谱变化
Fig. 4.
图 5. Frequency variation mechanism caused by operation temperature rise. RI: effective refractive index, L: cavity length工作温度升高时激光器重复频率的变化原理。RI：有效折射率，L：激光器腔长
Fig. 5.
图 6. (a) Repetition frequency as a function of V a (I g was fixed at 190 mA); (b) Corresponding spectra change
(a) 三个不同温度下当I g被设定在190 mA保持不变时，重复频率随V a的变化。(b) 对应的光谱变化
Fig. 6.
李翔, 汪宏, 乔忠良, 张宇, 牛智川, 佟存柱, 刘重阳. 2 μm GaSb基被动锁模激光器重复频率变化的研究（特邀）[J]. 红外与激光工程, 2020, 49(12): 20201054. Xiang Li, Hong Wang, Zhongliang Qiao, Yu Zhang, Zhichuan Niu, Cunzhu Tong, Chongyang Liu. Repetition frequency variation of a 2 μm GaSb-based passively mode-locked laser （Invited）[J]. Infrared and Laser Engineering, 2020, 49(12): 20201054.
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