Optical communications systems

Details Optical communications systems Optical communications systems

1995-06-20

1996-11-05

Williams, Hezron E.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359175, 359173, 359176, 359179, H04B 1000, H04B 1012, H04B 1002, H04B 1016

Patent

active

055723519

ABSTRACT:
In an optical communications system including a transmitter (laser 1) and a receiver, with an optical amplifier (3) and an optical filter (4) therebetween, the position of the passband of the optical filter (4) is adjusted automatically in dependence on a received pilot carrier signal frequency transmitted with the data. This facilitates initial selection of transmitter laser (1) and avoids the need for transmitter laser frequency stabilisation. The optical filter acquires and tracks the optical carrier used by the transmitter.

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