DocumentCode
2137652
Title
Demonstration of enhanced performance of HBT as photodetector
Author
De Barros, L. E M, Jr. ; Herczfeld, P.R. ; Madjar, A. ; Betser, Yoram ; Ritter, D.
Author_Institution
Center for Microwave/Lightwave Engineering - Drexel University, 32nd & Chestnut Streets, Philadelphia, PA 19104, USA
Volume
2
fYear
1997
fDate
8-12 Sept. 1997
Firstpage
1240
Lastpage
1245
Abstract
A new HBT design (optical-HBT), intended for photonic applications is proposed and implemented. The new device provides a window over the base mesa facilitating optical coupling maintaining high frequency performance. Theoretical and experimental results are compared to conventional microwave HBTs and to a commercially available high-speed PIN diode. Compared to the conventional microwave HBTs, the new design more than triple the BC-junction efficiency as well as increases the sensitivity. Compared to a 60% efficient PIN diode the optical HBT shows 8dB gain at low frequencies with a crossover point at 5.2Ghz. Optimization steps are discussed which project a photoresponsewith a 3dB bandwidth in excess of 35GHz and 6dB gain over the PIN diode.
Keywords
Bandwidth; Electrodes; Frequency; Heterojunction bipolar transistors; Lighting; Microwave devices; Optical design; Optical receivers; Optical sensors; Photodetectors;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Conference, 1997. 27th European
Conference_Location
Jerusalem, Israel
Type
conf
DOI
10.1109/EUMA.1997.337968
Filename
4139020
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