Optical circuit element and production method therefor,...

Details Optical circuit element and production method therefor,... Optical circuit element and production method therefor,...

2006-07-11

2006-07-11

Healy, Brian (Department: 2883)

Optical waveguides

Integrated optical circuit

C385S044000, C385S088000, C385S129000, C385S130000, C385S131000, C438S029000, C438S031000, C264S001240, C264S125000

Reexamination Certificate

active

07076125

ABSTRACT:
The present invention relates to a device and a method for monitoring each of the propagated light beams that are propagated in each waveguide of an arrayed waveguide device and a method of fabricating the device. In the prior art, problems were encountered in deriving monitor light and photodetecting the derived monitor light within the waveguide substrate. In the present invention, waveguide directional couplers are formed in the spaces between the arrayed waveguides to derive a portion of the propagated light as monitor light. Cavities are provided at the ends of auxiliary waveguides connected to the directional couplers, and monitor light is guideded into these cavities. The monitor light, after being reflected upward or downward of the substrate by optical path conversion elements installed inside the cavities, is photodetected by photodiodes. The optical path conversion elements can be fabricated by inserting metal bumps into the cavities and then forming the bumps with a mold.

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