Optical attenuator
US5572618A · kind A · utility
22Cited by
11References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1994 |
| Grant date | Nov 5, 1996 |
| Priority date | — |
| Expiry date | Jul 13, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/243
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A passive optical attenuating device comprises an optical waveguide adapted to receive optical radiation and absorb, along its length, at least 0.2 dB/m of the optical radiation. The waveguide section may be coupled to a low-loss optical fiber so as to receive an optical signal to be attenuated therefrom. In accordance with one aspect of the invention, at least one region of the waveguide is doped with a transition metal to achieve a pre-selected absorptivity per unit length so that a controlled degree of attenuation can be achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.