Optical pulse compressor for optical communications systems
US6108474A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1997 |
| Grant date | Aug 22, 2000 |
| Priority date | — |
| Expiry date | Dec 11, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/0057
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In accordance with the invention, an optical pulse compressor comprises a pulse source, a section of nonlinear optical waveguide including a periodic structure, such as a Bragg grating, for providing positive dispersion and a section of linear optical waveguide including a negative dispersion component. The nonlinear waveguide should have a second order index N.sub.2 at least ten times the second order index N.sub.2 ' of the linear waveguide. The nonlinear waveguide is preferably chalcogenide fiber, with a Bragg grating photoinduced into the core. Because the grating is 4-5 orders of magnitude more dispersive than standard optical fiber, the length of the nonlinear waveguide section can be scaled down to a few centimeters with accompanying reduction of deleterious processes. Modeling suggests that compression factors of 5 with an initial 60 ps pulse are achievable with grating lengths of about 20 cm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.