Optical space communication apparatus sending main signals and a

Details Optical space communication apparatus sending main signals and a Optical space communication apparatus sending main signals and a

1995-04-03

1997-03-11

Chin, Wellington

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359159, 359172, H04B 1000

Patent

active

056107480

ABSTRACT:
An optical space communication apparatus comprises a transmitter and a receiver. The transmitter has a main signal generator for producing a main signal, an auxiliary signal generator for producing an auxiliary signal in a frequency band different from that of the main signal, a combiner for combining the main signal with the auxiliary signal, an electro-optical converter for converting a combined signal of the main signal and the auxiliary signal into a light signal, and a transmission optical system for transmitting the light signal formed in light beam. The receiver has a reception optical system for receiving the light signal in light beam and a photo-electric converter for converting the light signal into an electric signal. The receiver further has a separator for separating the electric signal converted by the photo-electric converter into a main signal and an auxiliary signal, and an auxiliary signal detector for detecting the auxiliary signal separated by the separator.

REFERENCES:
patent: 3546465 (1968-05-01), Arnaud
patent: 3566128 (1968-06-01), Arnaud
patent: 4330870 (1982-05-01), Arends
patent: 4501022 (1985-02-01), Oswald
patent: 4562582 (1985-12-01), Tokura et al.
patent: 5214524 (1993-05-01), Shigematsu et al.
patent: 5245459 (1993-09-01), Faulkner et al.
patent: 5267071 (1993-11-01), Little et al.

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