Method for fabrication of in-line optical waveguide index grating of any length
US5912999A · kind A · utility
43Cited by
4References
44Claims
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Key dates
| Filing date | Oct 2, 1997 |
| Grant date | Jun 15, 1999 |
| Priority date | — |
| Expiry date | Oct 2, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/0057
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method and an apparatus for writing apodized Bragg gratings into an optical fiber. The method includes the steps of providing a photosensitive optical fiber and a writing beam. A periodic intensity distribution of period .LAMBDA. is created from the writing beam and the optical fiber is translated relative to the intensity distribution at a velocity v(t). The intensity of the writing beam is modulated as a function of time at a frequency f(t), where ##EQU1## The intensity of the writing beam is varied further to control the envelope of the refractive index profile to write apodized gratings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.