Method of receiving light and light receiving module of less polarized light dependency
US5604636A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1995 |
| Grant date | Feb 18, 1997 |
| Priority date | — |
| Expiry date | Apr 25, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/3066
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a light receiving module of a first aspect of the invention, a transparent plate is provided therein in such a way as to be tilted so that polarized light dependency generated thereby is equal to that generated by tilting a light receiving element and moreover in a positional relationship of being perpendicular to the latter in tilting direction. As a result, even if incident light is varied in polarized state, polarized light dependencies generated by the transparent plate and the light receiving element cancel each other to restrain the polarized light dependency of the incident light as a whole. In a light receiving module according of a second aspect of the invention, the light-emitting end surface of an optical fiber is formed in the same positional relationship relative to the light receiving surface of the light receiving element as that of the transparent plate of the first aspect of the invention. As a result, it is possible to provide a light receiving module which is reduced in polarized light dependency generated by tilting the light receiving element to be less influenced by the variation of polarized state of incident light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.