Variable polarization independent optical power splitter

Details Variable polarization independent optical power splitter Variable polarization independent optical power splitter

2006-09-26

2006-09-26

Nguyen, Tu T. (Department: 2877)

Optics: measuring and testing

By polarized light examination

With birefringent element

Reexamination Certificate

active

07113279

ABSTRACT:
A variable polarization independent optical power splitter is disclosed. An input light beam “A” is split into two output light beams “M” and “N” where the optical power ratio of the two output light beams “M” and “N” is adjusted to a desired ratio by controlling a variable polarization rotator, e.g. a liquid crystal unit. The polarization components “P” and “S” of the input light beam “A” are separated in a first polarization separator, then processed through the variable polarization rotator, and a second polarization separator. The polarization independence of the power split is thus achieved through the stratagem of processing the “P” and “S” polarized components of the input light beam “A” separately, resulting in four light beams “H”, “I”, “L” and “K”, which are appropriately combined in the polarization combiner to yield the output light beams “M” and “N” having the desired optical power ratio “R”.

REFERENCES:
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patent: 6594054 (2003-07-01), Dragone
patent: 6643433 (2003-11-01), Gonthier et al.
patent: 6718082 (2004-04-01), Zhao et al.

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