Optical: systems and elements – Polarization without modulation – Polarization using a time invariant electric – magnetic – or...
Patent
1997-02-24
2000-01-11
Shafer, Ricky D.
Optical: systems and elements
Polarization without modulation
Polarization using a time invariant electric, magnetic, or...
359495, 359497, 359282, 385 27, 385 34, 385 36, 385 38, G02B 530, G02B 632, G02B 634
Patent
active
060142545
ABSTRACT:
An optical fiber having a small numerical aperture (NA) is optically coupled with a short birefringent crystal to provide a polarization beam splitter. This arrangement obviates the use of a GRIN lens coupled between an input optical fiber and the birefringent crystal and provides significant cost savings by allowing a short crystal to be used. In this invention, the birefringent crystal has a beam-shifting angle that is larger than the numerical aperture at the output end of the optical fiber.
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