OPTICAL WAVEGUIDE MODULE

摘要

In a planar-waveguide-type optical circuit 1, a reflection filter 4 is placed inside an oblique groove 3 formed to traverse optical waveguides 2n. Reflected light from the reflection filter 4 is detected by photodetectors 61n of a photodetector array 6, and thereby light intensity of signal light is monitored. A glass substrate made of glass material having. a refractive index substantially identical to that of a core 20 of the optical waveguide 2n and filter fixing resin 5 fixing the reflection filter 4 is used for a substrate 10 of the optical circuit 1 constituting part of the groove 3. This inhibits reflection of light in various regions of the groove 3, thereby reducing generation of extra scattered light inside the groove 3 and its confinement. An optical waveguide module capable of enhancing monitoring characteristics of the signal light is thus realized. <IMAGE>