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Continuous Wave THz System Based on an Electrically Tunable Monolithic Dual Wavelength Y-Branch DBR Diode Laser
Journal of Infrared Millimeter and Terahertz Waves ( IF 2.9 ) Pub Date : 2020-02-15 , DOI: 10.1007/s10762-020-00676-4
Jared O. Gwaro , Carsten Brenner , L. S. Theurer , M. Maiwald , Bernd Sumpf , Martin R. Hofmann

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.

中文翻译:

基于电可调单片双波长Y分支DBR二极管激光器的连续波太赫兹系统

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。激光产生100 GHz至300 GHz范围内的电可调太赫兹差分频率。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)部分之一顶部的微电阻加热器中,可以调节光拍。激光被集成在采用光纤耦合离子注入LT-GaAs对数螺旋天线的零差太赫兹系统中。通过评估太赫兹滤光片的光谱共振以及聚乙烯样品厚度测定中的太赫兹计量学,证明了该开发系统在太赫兹光谱学中的适用性。
更新日期:2020-02-15
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