Optical fiber having a bragg grating in a wrap that resists temperature-induced changes in length
US6466716B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 24, 2000 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Aug 24, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0218
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An athermal packaging for a span of optical fiber having a Bragg grating to counteract a shift in the wavelength reflected light caused by a change in temperature of the span. The packaging is made from a resin system reinforced by a layer of contrahelically wound (and in some applications braided) reinforcing fibers and further reinforced by reinforcing fibers disposed substantially parallel to the axis of the span of the optical fiber. The reinforcing fibers are typically KEVLAR fibers. In some applications, a bulge is provided in the optical fiber on both sides of the span of the optical fiber having the Bragg grating and the athermal packaging is molded over at least a portion of both bulges as well as over the intervening span having the Bragg grating, thus creating mechanical interference against slippage of the athermal packaging during expansion of the optical fiber in response to an increase in temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.