Amplification of a nanosecond laser pulse chain via dynamic injection locking of a laser diode.
Amplification of a nanosecond laser pulse chain via dynamic injection locking of a laser diode.
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DOI：
10.1364/ol.41.005724
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发表时间：
2016-12
期刊：
影响因子：
3.6
通讯作者：
Jun He;Gang Jin;Bei Liu;Junmin Wang
中科院分区：
文献类型：
--
作者：
Jun He;Gang Jin;Bei Liu;Junmin Wang
报道了一种用于高速波长开关的纳秒激光脉冲产生方法。在自由运行条件下，从激光二极管相对于主激光器以数十GHz的频率蓝失谐。用尾纤电光强度调制器调制连续波主激光器产生的纳秒脉冲链注入从激光二极管，以快速来回切换从激光器的波长。从激光器的输出光束经温控标准具滤波后得到放大脉冲链。基于我们的动态注入锁定方案，我们产生了一个ns尺度的方波脉冲链，有效的ON/OFF比为108，考虑到至少60 dB的散射抑制，通过调谐光-原子相互作用与远偏离共振失谐和26.7 dB的抑制比的标准具。通过研究注入锁定的动态过程，确定了注入锁定与注入功率和频率失谐量的关系。
We report a novel optical pulse generation method for high-speed wavelength switching of amplified nanosecond (ns) laser pulses resonant to atomic transitions. Under free-running conditions, a slave laser diode is blue-detuned with tens of GHz relative to the master laser. A nanosecond pulse chain generated by modulating the continuous-wave master laser with a fiber-pigtailed electro-optical intensity modulator is injected into the slave laser diode to fast switch the slave laser's wavelength back and forth. The output beam of the slave laser is filtered by a temperature-controlled etalon to get the amplified pulse chain. Based on our dynamic injection locking scheme, we produce an ns-scale square pulse chain with an effective ON/OFF ratio ∼108, considering at least the 60 dB scattering suppression by tuning the light-atom interactions with far off-resonance detuning and the 26.7 dB suppression ratio of the etalon. By studying the dynamic processes of injection locking, we determine the dependence of injection locking on both the injection power and the frequency detuning.