Patent ID: 7215884
Filing Date: 2007-05-08
Classification: H04B

Abstract:
1. An optical communication module, comprising: a light source; a first optical detector for receiving a plurality of optical signals having a first wavelength; a first waveguide provided with a first end connected with the light source and a second end for inputting and outputting the plurality of optical signals, and for outputting output light of the light source through the second end; a second waveguide adjacent to the first waveguide at a predetermined section for mode coupling, said second waveguide having a third end connected with the first optical detector and transmitting the plurality of optical signals of the first wavelength inputted from the second end of the first waveguide to the first optical detector; a first Bragg diffraction grating formed on the third end of the second waveguide and having a wavelength selectivity for minimizing crosstalk from a wavelength of the output light that was measured at the first optical detector by transmitting the plurality of optical signals of the first wavelength at about 100% and by reflecting a wavelength of the output light at about 100%; and a dummy waveguide extending from a fourth end of the second waveguide, the third and fourth ends of the second waveguide being disposed at opposite ends of the second waveguide.