Optical waveguides – With optical coupler – Switch
Patent
1993-07-30
1994-06-14
Healy, Brian
Optical waveguides
With optical coupler
Switch
385 8, 385 11, 385 18, 385 24, 385 36, G02B 626, G02B 628
Patent
active
053217748
ABSTRACT:
In an optical fibre system, an optical fibre is monitored to determine if a transmitted signal is being received at a receiving end. A bi-modal optical switch located between the laser transmitter and receiver operates in a first transmitting mode to allow a transmitted signal to pass through and in a second reflecting mode to reflect back the transmitted signal to the transmitting end. A monitor at the transmitting end monitors the fibre for the absence or presence of the reflected signal. The switch can be used to remotely monitor the receiver in an optical fibre link, to control handshaking between two computers, to remove idle sections from an optical fibre communications network, and to control the reflectance of a laser mirror.
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Shirasaki et al., "Bistable Magnetooptic Switch . . . " Applied Optics, vol. 21, No. 11 Jun. 1982 pp. 1943-1949.
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Barnard Chris
Chrostowski Jacek
Healy Brian
National Research Council of Canada
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