Optical waveguides – With optical coupler – Plural
Patent
1994-02-16
1995-07-11
Bovernick, Rodney B.
Optical waveguides
With optical coupler
Plural
385 27, 385 31, 250551, 359115, 359152, G02B 628
Patent
active
054328748
ABSTRACT:
A light signal transmitting apparatus having first and second light signal terminals and two optical fibers for coupling the first and second light signal terminals to transmit light signals in the opposite directions. The first light signal terminal comprises a separating device for separating a multiplexed light signal in which first and second light signals are multiplexed, first and second light-sensing devices for receiving the first and second light signals thus separated, a detecting circuit for generating a detection signal on the basis of a received output of the second light-sensing device, and a first light emitting device controlled by the detecting circuit so that the first light emitting device emits a third light signal of sufficiently high output level when the second light signal is detected by the detecting circuit and that the first light emitting device emits a third light signal of low output level or disabled when the second light signal is not detected by the detecting circuit. The second light signal terminal comprises a third light-sensing device for receiving the third light signal, second and third light emitting devices for emitting the first and second light signals, and a multiplexer for multiplexing the first and second light signals to provide the multiplexed signal.
REFERENCES:
patent: 5005936 (1991-04-01), Hsu
patent: 5069521 (1991-12-01), Hardwick
patent: 5224183 (1993-06-01), Dugan
patent: 5315426 (1994-05-01), Aoki
patent: 5317440 (1994-05-01), Hsu
patent: 5343315 (1994-08-01), Auffret et al.
Bovernick Rodney B.
Palmer Phan T. H.
Shaw, Jr. Philip M.
Sony Corporation
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