Intensity detection of terahertz quantum cascade laser radiation using electro-optic sampling
Intensity detection of terahertz quantum cascade laser radiation using electro-optic sampling
复制标题
使用电光采样检测太赫兹量子级联激光辐射的强度
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
D. Ritchie
中科院分区：
文献类型：
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作者：
R. Rungsawang;O. Marshall;J. Freeman;H. Beere;S. Malik;J. Alton;S. Barbieri;D. Ritchie
我们研究了在交叉偏振器作用下，采用非同步电光(EO)采样的2 THz量子级联激光器的太赫兹辐射强度检测。EO探测晶体的剩余双折射限制了探测灵敏度。在100ps的光纤激光脉冲下，用一块CdTe EO晶体，探测到了功率小于100 μW的太赫兹辐射。飞秒选通脉冲提供了超短探测响应，这对于分析短脉冲辐射的时间性能或观测太赫兹脉冲探测到的快速现象可能非常有用。
We demonstrate intensity detection of terahertz radiation from a 2 THz quantum cascade laser with nonsynchronized electro-optic (EO) sampling under crossed polarizers. The detection sensitivity is limited by the residual birefringence of the EO detection crystal. With 100 fs fiber laser pulses and a CdTe EO crystal, terahertz radiation with power less than 100 μW was detected. A femtosecond gating pulse provides an ultrashort detection response that is potentially very useful for analyzing temporal performance of short pulsed radiation or observing fast phenomena probed by terahertz pulses.