Patent ID: 7313293
Filing Date: 2007-12-25
Classification: G02B

Abstract:
1. An optical power monitoring apparatus comprising: an input optical waveguide having a light entrance end and a light exit end, and arranged to accept light from an exterior through the light entrance end into an interior thereof, guide the light, and output the light from the light exit end; a light receiver having an absorber layer for absorbing part of the light outputted from the light exit end of the input optical waveguide, and arranged to output an electric signal at a value according to a power of light absorbed by the absorber layer, and transmit the other part of the light outputted from the light exit end of the input optical waveguide; and an output optical waveguide having a light entrance end and a light exit end, and arranged to accept the light transmitted by the light receiver, through the light entrance end into an interior thereof, guide the light, and output the light from the light exit end, wherein the light receiver is provided on an optical path from the light exit end of the input optical waveguide to the light entrance end of the output optical waveguide, and the plane direction of the absorber layer crosses the optical path.