INTEGRATED TYPE BRANCH COUPLER
PROBLEM TO BE SOLVED: To provide an integrated type branch coupler capable of preventing an optical signal from decreasing in signal-to-noise ratio by suppressing unnecessary interference even if radiation light is generated at a branch coupling part.SOLUTION: There is provided an integrated type br...
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| creator | NAKAGUCHI TOMOYUKI |
| description | PROBLEM TO BE SOLVED: To provide an integrated type branch coupler capable of preventing an optical signal from decreasing in signal-to-noise ratio by suppressing unnecessary interference even if radiation light is generated at a branch coupling part.SOLUTION: There is provided an integrated type branch coupler having a substrate 1 and an optical waveguide provided in the substrate right below an upper surface, and the optical waveguide includes one single-mode connection waveguide 2A, a first branch waveguide part comprising a plurality of first single-mode waveguides 2P, 2Q provided on a first side, a first branch coupling part 2R connecting the plurality of first single-mode waveguide to the single-mode connection waveguide, a second branch waveguide part comprising a plurality of second single-mode waveguides 2X, 2Y provided on a second side, a second branch coupling part 2S connecting the second single-mode waveguides to the single-mode connection waveguide, and shield means 17 provided on both sides of the single-mode connection waveguide. |
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| subjects | GYROSCOPIC INSTRUMENTS MEASURING MEASURING DISTANCES, LEVELS OR BEARINGS NAVIGATION OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHYSICS SURVEYING TESTING |
| title | INTEGRATED TYPE BRANCH COUPLER |
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