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Proceedings Paper

980-nm semiconductor optical preamplifier direct-detection receiver
Author(s): Peter J.S. Heim; Mario Dagenais; Michael Anthony Krainak; Richard P. Leavitt
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Paper Abstract

We report on the operation of a direct-detection 980 nm receiver based upon a semiconductor traveling wave optical preamplifier. An InGaAs/GaAs/AlGaAs single-quantum-well ridge- waveguide angled-facet optical amplifier was fabricated with an internal gain of over 30 dB and a noise figure of 3.8 dB. When used as an optical preamplifier, an improvement of 13 dB in receiver signal-to-noise sensitivity was measured relative to the PIN receiver without optical preamplifier. The signal-to-noise performance of a 250 MHz APD receiver was also measured and was observed to be 8 dB more sensitive than the optically preamplified receiver. Calculations based on these results indicate that with a narrower optical filter bandwidth (0.1 nm) and improved amplifier input coupling efficiency (50%), the optically preamplified receiver can simultaneously achieve high-sensitivity (5 dB better than 250 MHz bandwidth APD) and high-bandwidth (30 GHz).

Paper Details

Date Published: 22 April 1996
PDF: 7 pages
Proc. SPIE 2699, Free-Space Laser Communication Technologies VIII, (22 April 1996); doi: 10.1117/12.238417
Show Author Affiliations
Peter J.S. Heim, Univ. of Maryland/College Park (United States)
Mario Dagenais, Univ. of Maryland/College Park (United States)
Michael Anthony Krainak, NASA Goddard Space Flight Ctr. (United States)
Richard P. Leavitt, Army Research Lab. (United States)

Published in SPIE Proceedings Vol. 2699:
Free-Space Laser Communication Technologies VIII
G. Stephen Mecherle, Editor(s)

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