Photodetector coupled to a planar waveguide
First Claim
1. An electro-optical system comprising a planar optical structure and an electro-optical interface, the planar optical structure comprising a planar waveguide that terminates at the edge of the planar structure and the electro-optical interface comprising a transparent substrate, which is transparent at a selected wavelength, attached at the edge of the planar structure to receive light from the waveguide and a first photodetector secured to the transparent substrate at a position to receive the light from waveguide through the transparent structure and wherein at least one surface of the transparent substrate has a coating that rejects selected undesirable wavelengths from reaching the first photodetector.
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Accused Products
Abstract
An improved electro-optical system has a planar waveguide coupled to a photodetector through a transparent substrate. The planar waveguide is within a planar optical structure that can be part of optical communication network. The photodetector is positioned to receive light that passes from the waveguide through the transparent substrate. The photodetector can be electrically coupled to electrical circuitry along the transparent substrate for connection to a electrical apparatus. Corresponding methods for forming the electro-optical structure are described. These improved electro-optical systems can be used for terminating an optical transmission system at an end user or a local network associated with a group of end users.
20 Citations
19 Claims
- 1. An electro-optical system comprising a planar optical structure and an electro-optical interface, the planar optical structure comprising a planar waveguide that terminates at the edge of the planar structure and the electro-optical interface comprising a transparent substrate, which is transparent at a selected wavelength, attached at the edge of the planar structure to receive light from the waveguide and a first photodetector secured to the transparent substrate at a position to receive the light from waveguide through the transparent structure and wherein at least one surface of the transparent substrate has a coating that rejects selected undesirable wavelengths from reaching the first photodetector.
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19. A method for forming an electro-optical system comprising a planar optical structure and an electro-optical interface, the planar optical structure comprising a planar optical waveguide that terminates at the edge of the planar structure and the electro-optical interface comprising a transparent substrate, which is transparent at a selected wavelength, the method comprising:
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attaching a transparent substrate at a first surface of the substrate to the face of the edge of the planar optical structure; and fastening a photodetector to the transparent substrate at a second surface of the substrate opposite the first surface and aligned at a position to receive light from the planar waveguide through the transparent substrate.
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Specification