Abstract
Bandwidth of traveling-wave photodetectors is limited not only by the optical absorption coefficient and the velocity mismatches, but also by the drift time of photo-generated carriers in the i-layer. The bandwidth limitation effect of the optical absorption coefficient and the velocity mismatches have already been considered and analyzed by presenting the velocity-mismatch impulse response. In this paper, we present a modified velocity-mismatch impulse response considering the effect of the transit time. The modified impulse response is modeled by the optical waveguide analysis and the segmentation of i-layer. The frequency impulse response is also obtained by the FFT of the modified impulse response. It is found that bandwidth limitation effect of the transit time is more serious than the effect of velocity mismatch, especially at high frequency.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
