Aligning and directly optically coupling photodetectors to optical demultiplexer outputs in a multichannel receiver optical subassembly
US9509433B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2013 |
| Grant date | Nov 29, 2016 |
| Priority date | — |
| Expiry date | Jan 14, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multi-channel receiver optical subassembly (ROSA) such as an arrayed waveguide grating (AWG), with outputs directly optically coupled to respective photodetectors such as photodiodes. In one embodiment, an AWG may be configured such that optical components of the AWG do not interfere with direct optical coupling, and the wire bonding points on the photodiodes may also be configured such that wire bonding does not interfere with direct optical coupling. The photodetectors may also be mounted on a photodetector mounting bar with a pitch sufficiently spaced to allow connection to floating grounds. A passive alignment technique may be used to determine the mounting locations on the photodetector mounting bar such that the photodetectors are aligned with the optical outputs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.