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Microwave Characteristics Analysis of TWPD′s Using the FDTD Method  

Gong, Sun-Cheol (중앙대학교 광전자 광통신 연구실)
Lee, Seung-Jin (중앙대학교 광전자 광통신 연구실)
Lee, Jeong-Hun (중앙대학교 광전자 광통신 연구실)
Ok, Seong-Hae (중앙대학교 광전자 광통신 연구실)
Choe, Yeong-Wan (중앙대학교 광전자 광통신 연구실)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.39, no.4, 2002 , pp. 63-71 More about this Journal
Abstract
In this paper, we present microwave characteristics of traveling-wave photodetectors (TWPD) using the finite-difference time-domain method (FDTD). Current and voltage in the time domain are calculated by the FDTD. Also, characteristic impedance and propagation constant in frequency domain are obtained from the time-domain data. As the thickness of i-layer gets thicker and the waveguide width gets narrower, TWPD's show less microwave loss and higher velocity. The 50Ω impedance matching design is achieved for 2.4${\mu}{\textrm}{m}$ waveguide width and 1.2${\mu}{\textrm}{m}$ thickness of i-layer at 100 GHz.
Keywords
TWPD; FDTD; Microwave-photonics;
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