Title :
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
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;
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
DOI :
10.1109/SBMOMO.1997.646855
