Title:
DEVICES AND METHODS FOR SPATIAL FILTERING
Document Type and Number:
WIPO Patent Application WO/2009/109806
Kind Code:
A8
Abstract:
Methods and devices for polarizing light in a proton exchange polarizer where cross-coupling of unwanted modes of light is reduced with an integrated spatial filter. An optically transmissive substrate such as a substrate (16a) created from LiNbO3 or LiTaO3 has side surfaces, which reflect unguided TM mode light. The light originates from an input fiber (12). The input fiber is connected to the substrate at one end and an output fiber is connected to receive guided TE mode light at the opposite end. The spatial filter (34, 38a-c, 42, 44) is positioned at the primary reflection position of the light with respect to the sides of the polarizer. To improve extinction further, the spatial filter can also be located at secondary reflection points in another alternate embodiment.
Inventors:
LEWIS JEFFREY E (US)
Application Number:
PCT/IB2008/003891
Publication Date:
August 26, 2010
Filing Date:
October 22, 2008
Export Citation:
Assignee:
HONEYWELL INT INC (US)
LEWIS JEFFREY E (US)
LEWIS JEFFREY E (US)
International Classes:
G02B6/12; G02B27/46
Attorney, Agent or Firm:
BEATUS, Carrie (Law Department AB/2B101 Columbia Roa, Morristown NJ, US)
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