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Proceedings Paper

Heterojunction Phototransistors For Fiber-Optic Communications
Author(s): R. A. Milano; P. D. Dapkus; G. E. Stillman
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Paper Abstract

The theory of operation of the heterojunction phototransistor is reviewed and the limitations on gain and speed-of-response are examined in the context of fiber-optic systems requirements. The response of the base potential is shown to depend on the input optical power yielding a power dependent gain-bandwidth product, fT. Model calculations assuming an optimized device structure with peak response in the 1. μm - 1.55 μm spectral region are used to demonstrate the consequences of this dependence. The results indicate that the HPT can have sufficient gain and speed-of-response if a dc bias current is used. A comparison of the S/N of the HPT and an APD is presented to clarify system applicability.

Paper Details

Date Published: 28 July 1981
PDF: 8 pages
Proc. SPIE 0272, High Speed Photodetectors, (28 July 1981); doi: 10.1117/12.965691
Show Author Affiliations
R. A. Milano, Rockwell International Microelectronics Research and Development Center (United States)
P. D. Dapkus, Rockwell International Microelectronics Research and Development Center (United States)
G. E. Stillman, University of Illinois (United States)

Published in SPIE Proceedings Vol. 0272:
High Speed Photodetectors
Lou Tomasetta, Editor(s)

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