Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1988-03-14
1989-08-22
Sikes, William L.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
350 9615, 455610, G02B 628, H04B 900
Patent
active
048590193
ABSTRACT:
A fiber optic telemetry system includes an input coupler having a terminal connected to the input of the telemetry system. An output coupler has one of its terminals connected to the output of the telemetry system. A first interferometer or sensor has its input terminal connected to the output terminal of the input coupler, and has its output terminal connected to the output coupler. A third coupler has one of its input terminals connected to the second output of the input coupler, and has a second input terminal connected to the second input of the output coupler. Second and third sensors have their input terminals connected to the output terminals of the third coupler.
REFERENCES:
patent: 4357606 (1982-11-01), Fortescue
patent: 4671608 (1987-06-01), Konishi
patent: 4708424 (1987-11-01), Marhic
patent: 4727601 (1988-02-01), Konishi
patent: 4730888 (1988-03-01), Darcie et al.
Kramsky Elliott N.
Litton Systems Inc.
Sikes William L.
Ullah Akm E.
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