An analysis for design optimization of mesh-type high-speed optical position sensitive devices (MEPSDs)

Author

Dutta, Achyut Kumar ; Hatanaka, Yoshinori

Author_Institution

Graduate Sch. of Electron. Sci. & Technol., Shizuoka Univ., Hamamatsu, Japan

Volume

9

Issue

3

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

409

Lastpage

413

Abstract

An analysis is given for designing high-speed optical position-sensitive devices (PSDs) with mesh-type resistive layers used for reducing the junction capacitance. For the MEPSD, reduction of the capacitance is dependent on the selection of the strip width and strip distance, and they should be selected in such a way that the diffusion time of the carriers must not dominate the response time, compared with the RC time constant of the devices. This analysis includes the effect of the surface recombination velocity on the collected current, and it can be applied to the choice of the optimal parameters for designing the MEPSD. From the results it is found that MEPSD of 5×5 cm² can be designed to operate two orders of magnitude faster than the conventional-type PSD

Keywords

photodetectors; photodiodes; 5 cm; RC time constant; carrier diffusion; collected current; design optimization; diffusion time; junction capacitance; mesh-type high-speed optical position sensitive devices; mesh-type resistive layers; photogenerated carriers; response time; strip distance; strip width; surface recombination velocity; Capacitance; Delay; Design optimization; Electrodes; High speed optical techniques; Insulation; Optical devices; Optical sensors; Strips; Student members;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.70020

Filename

70020