Optical waveguide module

Details Optical waveguide module Optical waveguide module

G - Physics

02

B

G02B 6/12 (2006.01) G02B 6/36 (2006.01) G02B 6/42 (2006.01) G02F 1/01 (2006.01)

Patent

CA 2377116

Z In a planar waveguide optical circuit 1, a inclined groove 3 is formed at an inclination angle 6 with respect to the vertical axis so as to cross optical waveguides 2 n. A reflection filter 4 structured such that the difference in reflectivity between orthogonal polarization is compensated for with respect to signal light is installed inside the groove 3, the reflected light from the reflection filter 4 is detected by the photodetectors 6n, and the optical intensity of the signal light is monitored. This makes it possible to accurately monitor the optical intensity regardless of the polarization state of the signal light. Also, since the inside of the groove 3 including the reflection filter 4 is sealed with a filler resin 5, any deterioration in long-term stability that would otherwise be caused by contamination of these components is prevented. Thus, the optical waveguide module with which the structure of the optical circuit is simpler, and the optical intensity can be correctly monitored regardless of the state of polarization of the signal light is realized.

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