Temperature compensating device for optical fibre gratings

摘要

The present invention relates to a temperature compensating device for a prestrained fiber grating of an optical fiber, wherein said device comprises a body with a substantially cylindrical form and wherein the fiber grating is wound up on said body, whereby the dimensions of said body vary according to a change in temperature. The temperature compensating devive according to the invention is athermal and allows a tunig of the wavelength of the fiber grating.