Switchable wavelength router

Optical: systems and elements – Deflection using a moving element – Using a periodically moving element

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Details

359127, 359156, 359251, H04J 1400, H04B 1000

Patent

active

056942338

ABSTRACT:
A switchable wavelength router has a first birefringent element that decomposes and spatially separates an incoming WDM optical signal into two orthogonally-polarized beams. A first polarization rotator selectably rotates the polarization of one of the beams to match the polarization of other beam, based on an external control signal. A wavelength filter (e.g., stacked waveplates) provides a polarization-dependent optical transmission function such that the first beam decomposes into third and fourth orthogonal beams, and the second beam decomposes into fifth and sixth orthogonal beams. The third and fifth beams carry a first spectral band at a first polarization and the fourth and sixth beams carry a second spectral band at an orthogonal polarization. A second birefringent element spatially separates these four beams into four horizontally polarized and vertically polarized components. A second polarization rotator rotates the polarizations of the beams so that the third and fifth beams, and the fourth and sixth beams are orthogonally polarized. A third birefringent element recombines the third and fifth beams (i.e., the first spectral band), and also recombines the fourth and sixth beams (i.e., the second spectral band) which are coupled to the two output ports based on the control state of the wavelength router.

REFERENCES:
patent: 4650289 (1987-03-01), Kuwahara
patent: 4720171 (1988-01-01), Baker
patent: 4919522 (1990-04-01), Nelson
patent: 4989941 (1991-02-01), Soref
patent: 5013140 (1991-05-01), Healey et al.
patent: 5162944 (1992-11-01), Yamamoto et al.
patent: 5165104 (1992-11-01), Weverka
patent: 5317658 (1994-05-01), Bergland et al.
patent: 5363228 (1994-11-01), DeJule et al.
patent: 5381250 (1995-01-01), Meadows
patent: 5414541 (1995-05-01), Patel et al.
"Synthesis of Electro-Optic Shutters having a Prescribed Transmission vs. Voltage Characteristic", by E.O. Ammann, Journal of the Optical Society of America, vol. 56, No. 8, pp. 1081-1088 (Aug. 1966).
"Optical Network Synthesis Using Birefringent Crystals. *I. Synthesis of Lossless Networks of Equal-Length Crystals", by S.E. Harris et al., Journal of the Optical Society of America, vol. 54, No. 10, pp. 1267-1279 (Oct. 1964).

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