Patent ID: 6490393
Filing Date: 2002-12-03
Classification: G02B,H04J

Abstract:
An integrated optical signal detector for detecting a transmitted optical signal and converting the detected signal to an electrical signal, said detector comprising:a silicon integrated circuit substrate; at least one photo detector formed on said substrate; signal conditioning electronics formed on said substrate; said signal conditioning electronics being electrically coupled to said photo detector and being configured to receive signals from said photo detector and to process the received signals into an electrical output; a first layer of optically transparent material overlying said substrate, said first layer of optically transparent material having a first index of refraction; a second layer of optically transparent material overlying said first layer of optically transparent material, said second layer of optically transparent material having a second index of refraction; a binary blazed grating formed at the interface between said first and said second layers of optically transparent material, said binary blazed grating being configured to diffract an incident light beam from said second layer of optically transparent material through said first layer of optically transparent material and onto said photo detector; said second layer of optically transparent material forming a waveguide, the integrated optical signal being transmitted at least partially through said waveguide to said binary blazed grating.