Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1991-12-05
1994-03-08
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
H04B 1006
Patent
active
052932648
ABSTRACT:
The invention relates to a transmission system for the polarization insensitive transmission of signals over a signal path between a transmitter and a receiver, provided with high-order retarder. The retarder is a combination of a polarization-splitting coupling and a loop-type delaying transmission route. The retarder may be sited at the receiver end, with a suitably chosen angle between one of the principal axes of the retarder and the polarization of a local oscillator incorporated in the receiver. Advantages are reduction in size and number of components in the retarder, reduction in the number of retarders in such a transmission system and an increase of the capacity for integration.
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patent: 5170275 (1992-12-01), Large
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Koninklijke PTT Nederland N.V.
Pascal Leslie
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