A large area, high speed photodetector for a microwave modulated hybrid lidar-radar application

Author

Yost, Tamera A. ; Herczfeld, Peter R. ; Nabet, Bahram ; Contarino, Vincent M. ; Culp, James A.

Author_Institution

Center for Microwave-Lightwave Eng., Drexel Univ., Philadelphia, PA, USA

Volume

1

fYear

1997

fDate

11-14 Aug 1997

Firstpage

233

Abstract

For microwave modulated lidar applications, a large area photodetector with low noise, high gain, and a bandwidth of a few gigahertz is needed. The photodetector presented is a vacuum photodiode that employs a planar 300 μm² metal-semiconductor-metal device as the anode to increase the response speed. This is the first known use of a metal-semiconductor-metal device under electron bombardment. The photodetector has an 8 mm active area, noise figure less than 1.5 dB, gain greater than 10³, and an expected bandwidth exceeding 3 GHz

Keywords

metal-semiconductor-metal structures; optical radar; photodetectors; phototubes; radar detection; 1.5 dB; 3 GHz; GaAsP; GaAsP photocathode; MSM device based anode; electron bombardment; high gain type; high speed photodetector; large area photodetector; low noise type; metal-semiconductor-metal device; microwave modulated hybrid lidar-radar; vacuum photodiode; Anodes; Bandwidth; Electrodes; Electron optics; Gallium arsenide; High speed optical techniques; Optical modulation; Optical receivers; Photodetectors; Photodiodes;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Optoelectronics Conference, 1997. Linking to the Next Century. Proceedings., 1997 SBMO/IEEE MTT-S International

Conference_Location

Natal

Print_ISBN

0-7803-4165-1

Type

conf

DOI

10.1109/SBMOMO.1997.646855

Filename

646855