Optical isolator
US5278853A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1992 |
| Grant date | Jan 11, 1994 |
| Priority date | — |
| Expiry date | May 27, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S372/703
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A high quality small-sized polarization independent optical isolator for use in an optical fiber communication system, wherein a pair of magneto-optical elements having Faraday rotation angle of 45.+-.5 are contained in permanent magnets and arranged between a pair of birefringent crystal plates for splitting and combining an optical path of a laser light, and two polarizers arranged in parallel as being bounded on the midpoint of separated optical paths are interposed between the pair of magneto-optical elements, whereby a degree of worsening the optical isolation can be kept minimum against variations of an environmental temperature and wave length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.