A novel monolithic distributed traveling-wave photodetector with parallel optical feed

Author

Murthy, Sanjeev ; Jung, Thomas ; Chau, Tai ; Wu, Ming C. ; Sivco, Deborah L. ; Cho, Alfred Y.

Author_Institution

Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA

Volume

12

Issue

6

fYear

2000

fDate

6/1/2000 12:00:00 AM

Firstpage

681

Lastpage

683

Abstract

We report on a novel monolithic distributed traveling wave photodetector with parallel optical feed to an array of individual photodiodes using an integrated multimode interference (MMI) coupler to attain high saturation current. The parallel optical feed reduces the maximum photocurrent and photocurrent density seen by any single photodiode, thus increasing the maximum linear photocurrent of the detector. We have successfully fabricated a device with a maximum linear photocurrent of 20 mA and a responsivity of 0.13 A/W.

Keywords

integrated optoelectronics; metal-semiconductor-metal structures; optical arrays; optical beam splitters; optical design techniques; optical fabrication; photodetectors; photodiodes; 20 mA; InGaAs-InAlAs-InP; high saturation current; integrated multimode interference coupler; maximum linear photocurrent; monolithic distributed traveling-wave photodetector; parallel optical feed; photocurrent density; photodiode array; responsivity; single photodiode; Detectors; Feeds; High speed optical techniques; Interference; Optical saturation; Optical waveguides; Photoconductivity; Photodetectors; Photodiodes; Radio frequency;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.849083

Filename

849083