Optical filter on optical fiber end face
US5037180A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1990 |
| Grant date | Aug 6, 1991 |
| Priority date | — |
| Expiry date | Jul 19, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02052
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In this invention there is disclosed an optical filter disposed on an optical fiber. More specifically, a filter comprised of a multilayer thin-film stack of low and high index of refraction material is deposited onto the end of an optical fiber. The filter can be, for example, a long-pass filter, a Fabry-Perot Etalon, a Double-Cavity Filter, and the like. Filters deposited on perpendicular facets of single-mode fibers reflect most of the power that is not transmitted. This reflection if fed back to a laser or an amplifier can cause a problem, particularly if an isolator does not adequately block the reflections. A bevel on the fiber end face can eliminate this problem by preventing the reflected power from being directed back into the optical fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.