Optical wavelength selective router

Details Optical wavelength selective router Optical wavelength selective router

2010-10-25

2011-12-13

Sanghavi, Hemang (Department: 2874)

Optical waveguides

With optical coupler

Switch

C385S011000, C385S016000, C385S024000, C385S037000

Reexamination Certificate

active

08078019

ABSTRACT:
A fiber-optical, wavelength selective switch, especially for channel routing with equalization and blocking applications. The input signals are converted to light beams having predefined polarizations (41). The beams are then laterally expanded (43), and then undergo spatial dispersion in the beam expansion plane. The different wavelength components are directed through a polarization rotation device, pixilated along the wavelength dispersion direction such that each pixel operates on a separate wavelength. Each beam is passed into a pixilated beam steering array (48), for directing each wavelength to a desired output port. The beam steering devices can be MEMS-based or Liquid crystal-based, or an LCOS array. When the appropriate voltage is applied to a pixel and its associated beam steering element, the polarization of the light passing through the pixel is rotated and the beam steered to couple to the selected output port.

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Japanese Application No. 2008-529785 Official Action (Mar. 22, 2011) (English translation attached).

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