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Proceedings Paper

Monolithic semiconductor active waveguide optical switch
Author(s): Chet L. Balestra; Richard J. Blackwell; Bartley C. Johnson; L. G. Perrymore
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Paper Abstract

We have utilized a semiconductor optical amplifier (SOA) as an optical gain/absorption switch and have demonstrated an array of such switches in the form of a monolithic 4 X 4 optical crossbar switch. This device is completely nonblocking and can be operated in either a point-to-point or broadcast mode, simultaneously linking any combination of four input/output ports on one side with any combination of ports on the other. It is housed in a standard hybrid flatpack, with external control leads and eight connectorized optical fibers. The device consists of ridge waveguides, etched-facet turning mirrors, and etched T-branches laid out into an all- optical-path network. It is fabricated from a single GaAs quantum well/AlGaAs GRINSCH epitaxial structure on an N+ GaAs substrate. Because the paths are optical, they transmit signals in either direction -- i.e., the device can operate in a duplex (bidirectional) mode. We have demonstrated switching functionality, simultaneous routing of two digital FM video signals, and routing of pseudo-random NRZ data.

Paper Details

Date Published: 15 September 1993
PDF: 9 pages
Proc. SPIE 1953, Photonics for Space Environments, (15 September 1993); doi: 10.1117/12.156570
Show Author Affiliations
Chet L. Balestra, McDonnell Douglas Corp. (United States)
Richard J. Blackwell, McDonnell Douglas Corp. (United States)
Bartley C. Johnson, McDonnell Douglas Corp. (United States)
L. G. Perrymore, McDonnell Douglas Corp. (United States)

Published in SPIE Proceedings Vol. 1953:
Photonics for Space Environments
Edward W. Taylor, Editor(s)

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