Optical multiplexing/demultiplexing module

Details Optical multiplexing/demultiplexing module Optical multiplexing/demultiplexing module

H - Electricity

04

J

H04J 14/02 (2006.01) G02B 6/34 (2006.01) G02B 27/28 (2006.01) G02B 6/10 (2006.01)

Patent

CA 2353732

A first linearly polarized beam (14) which has exited a first optical waveguide (30) and which has been collimated by a first lens (24) and a second linearly polarized beam (16) which has exited a second optical waveguide (32) and which has been collimated by a second lens (26) enter an entrance surface (18) of a uniaxial birefringent crystal (10). The second linearly polarized beam (16) enters the uniaxial birefringent crystal (10) along an optical path which is changed by a prism (12). This reduces a separation width D which is the distance between the point of entrance of the first linearly polarized beam (14) entering the uniaxial birefringent crystal (10) and the point of entrance of the second linearly polarized beam (16) entering the uniaxial birefringent crystal (10). The first and second linearly polarized beams (14) and (16) which have entered the uniaxial birefringent crystal (10) are multiplexed at an exit surface (22) of the uniaxial birefringent crystal. A resultant multiplexed beam (20) is converged by a third lens (28) to enter and exit a third optical waveguide (39).

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