Improving bandwidth of parallel-fed travelling wave photo detectors

Author

Livani, Abdolber Mallah ; Kaatuzian, Hassan

Author_Institution

Dept. of Electr. Eng., Amirkabir Univ. of Technol. (Tehran Polytech.), Tehran, Iran

fYear

2012

fDate

15-17 May 2012

Firstpage

267

Lastpage

269

Abstract

Parallel-fed travelling wave photo detectors (TWPDs) are used frequently in high power, high bandwidth applications. However increasing the number of photodiodes within their structure in order to increasing high power capabilities significantly reduces bandwidth. So there is trade-off. We have improved -3dB bandwidth of a parallel-fed TWPD, with four photodiodes, by varying its structural parameters. Resultant bandwidth of the photo detector is 105GHz which shows 25GHz improvement with respect to TWPDs that have been reported previously. S₂₂ of this photo detector is below -10dB within its bandwidth which shows that Bragg frequency is much higher than bandwidth.

Keywords

microwave detectors; millimetre wave detectors; photodetectors; photodiodes; Bragg frequency; bandwidth 105 GHz; bandwidth reduction; frequency 25 GHz; gain -3 dB; parallel-fed TWPD; parallel-fed travelling wave photodetector; photodiode; power capability; structural parameter; Electron optics; Photonics; electrical model; parallel-fed; traveling wave photo detector;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Engineering (ICEE), 2012 20th Iranian Conference on

Conference_Location

Tehran

Print_ISBN

978-1-4673-1149-6

Type

conf

DOI

10.1109/IranianCEE.2012.6292366

Filename

6292366