High isolation optical switch, isolator or circulator having thin film polarizing beam-splitters
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United States of America Patent
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Nov 26, 2002
Issued Date -
N/A
app pub date -
Jan 25, 1999
filing date -
Aug 12, 1996
priority date (Note) -
Expired
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Abstract
An optical device for controlling the flow of light between ports includes a pair of polarizing devices, which employ frustrated total internal reflection and interference in a thin film coating to reflect p-polarized light and to transmit s-polarized light. Polarization-rotating devices are used to rotate the polarization plane of the s- and p-polarized light beams so as to create optical switches, isolators and circulators using these polarizing devices.
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