Polarization insensitive optical device

Details Polarization insensitive optical device Polarization insensitive optical device

G - Physics

02

B

G02B 26/08 (2006.01) G02B 6/26 (2006.01) G02B 6/35 (2006.01) G02B 27/28 (2006.01)

Patent

CA 2364286

A device serving as an optical switch or attenuator is disclosed, based on the insertion of a halfwave plate in a collimated beam space between two lenses. All beams have first been aligned to a same polarization state by standard polarization diversity techniques. Moving the halfwave plate into or out of the beam incident thereon enables switching the beams direction based on polarization. Partial insertion of the waveplate attenuates the beam through rotation of polarization state for part of the beam. Preferably, polarizers are used to improve extinction ratio and wavelength flatness.

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