Continuous Wave THz System Based on an Electrically Tunable Monolithic Dual Wavelength Y-Branch DBR Diode Laser
Continuous Wave THz System Based on an Electrically Tunable Monolithic Dual Wavelength Y-Branch DBR Diode Laser
复制标题
基于电可调谐单片双波长 Y 分支 DBR 二极管激光器的连续波 THz 系统
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
M. Hofmann
中科院分区：
文献类型：
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作者：
J. Gwaro;C. Brenner;L. S. Theurer;M. Maiwald;B. Sumpf;M. Hofmann
我们分析了可调谐双波长 Y 分支 DBR 激光二极管在太赫兹应用中的使用。激光器产生 100 至 300 GHz 范围内的电可调 THz 差频。通过将电流注入到集成在二极管的分布式布拉格反射器 (DBR) 部分顶部的微电阻加热器中来调节光拍。该激光器集成在采用光纤耦合离子注入 LT-GaAs 对数螺旋天线的零差 THz 系统中。通过评估太赫兹滤波器的光谱共振以及聚乙烯样品厚度测定的太赫兹计量，证明了所开发系统在太赫兹光谱中的适用性。
We analyse the use of a tunable dual wavelength Y-branch DBR laser diode for THz applications. The laser generates electrically tunable THz difference frequencies in the range between 100 and 300 GHz. The optical beats are tuned via current injection into a micro-resistor heater integrated on top of one of the distributed Bragg reflector (DBR) section of the diode. The laser is integrated in a homodyne THz system employing fiber coupled ion-implanted LT-GaAs log spiral antennas. The applicability of the developed system in THz spectroscopy is demonstrated by evaluating the spectral resonances of a THz filter as well as in THz metrology in thickness determination of a polyethylene sample.