Compact polarization beam combiner/splitter
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United States of America Patent
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N/A
Issued Date -
Dec 5, 2002
app pub date -
May 30, 2001
filing date -
May 30, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An apparatus and method for splitting and combining optical beams. The apparatus comprises a pair of closely-spaced optical fibers that propagate optical beams through a first lens element that collimates both beams. An adjoining, a polarizing beam splitter element, typically in the form of a birefringent crystal or birefringent crystal assembly, then combines the optical beams. The combined optical beam then propagates through a second lens element which focuses the optical beam into an adjoining single optical fiber. The apparatus is configured to be compact and linear. By using a less-than quarter pitch first lens disposed adjacent a polarizing beam splitter element, focusing of the preferred embodiment of the present invention is less critical than with other combiner configurations.
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