LiNbO3電光調(diào)制器行波電極微波等效折射率的測(cè)量
Measurement of microwave equivalent refractive index of traveling wave electrode in LiNbO3 electro-optic modulator
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摘要: LiNbO3電光調(diào)制器的設(shè)計(jì)中,行波電極的微波等效折射率是一個(gè)重要的參數(shù)。該文通過自行設(shè)計(jì)的微波探針架及探針,采用差值的方法,在微波網(wǎng)絡(luò)分析儀上對(duì)樣品CPW電極的微波等效折射率進(jìn)行了測(cè)量,分析了實(shí)測(cè)值與理論計(jì)算值的偏差,給出了修正因子,研究了微波等效折射率隨頻率變化的色散現(xiàn)象,并對(duì)這種測(cè)量方法進(jìn)行了誤差分析,提出了減小誤差的方法。
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關(guān)鍵詞:
- 微波等效折射率; LiNbO3電光調(diào)制器; 行波CPW電極
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. -
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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