Optical telecommunications system using phase compensation inter

Details Optical telecommunications system using phase compensation inter Optical telecommunications system using phase compensation inter

1993-12-03

1995-12-05

Boudreau, Leo H.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359156, 359173, 359161, 385 11, 385 14, 385 27, H04B 1004, H04B 1000

Patent

active

054734592

ABSTRACT:
Optical telecommunications systems use phase compensation interferometry wherein receiver units have interferometer configurations with path length differences identical to path length differences of arms in interferometer configurations at corresponding transmitter units. Faraday rotating mirrors are used to minimize sensitivity to polarization effects. A modified Michelson interferometer structure is used to provide optical signals which convert to electrical signals in a form allowing relatively easy demodulation. A demodulation circuit uses the property whereby two signals have a 90.degree. phase shift.

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