LiNbO3电光调制器行波电极微波等效折射率的测量
Measurement of microwave equivalent refractive index of traveling wave electrode in LiNbO3 electro-optic modulator
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摘要: LiNbO3电光调制器的设计中,行波电极的微波等效折射率是一个重要的参数。该文通过自行设计的微波探针架及探针,采用差值的方法,在微波网络分析仪上对样品CPW电极的微波等效折射率进行了测量,分析了实测值与理论计算值的偏差,给出了修正因子,研究了微波等效折射率随频率变化的色散现象,并对这种测量方法进行了误差分析,提出了减小误差的方法。Abstract: The effective microwave refractive index (Nm) of traveling wave electrode is an important parameter in the designing of LiNbO3 electro-optic modulator. A method for mea-kiring Nm is proposed in this paper. The probe frames, microwave probe and three kinds of sample CPW electrodes used in this method are designed and fabricated. The experimental results of Nm in CPW traveling-wave electrode are given. Finally, the errors of the measurement are analyzed.
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M. Jenu, Rugged probe design delivers MIC measurements.[J]. Microwaves RF.1996,35(6):104-[2]W.K. Wang, R. W. Smith, P. J. Anthony, Full-wave analysis of coplanar waveguides for LiNbO3 optical modulators by the mode-matching method considering nonideal conductors on etched buffer layers, Journal of Lightwave Technology, 1995, 13(11), 2250-2257. -
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