Temperature compensated fiber grating and method for compensating temperature variation in fiber grating

摘要

The present invention provides a temperature compensated optical device which is capable of compensating for the inherent temperature variations of the fiber grating. The temperature compensated optical device includes an optical fiber having a grating therein for reflecting light passing therethrough within a range about a central wavelength and a temperature compensating member affixed to the optical fiber proximate the grating. The temperature compensating member comprises an anisotropic material having a negative temperature expansion coefficient along at least one axis thereof. The optical fiber is aligned at a predetermined angle with respect to the axis to compensate a temperature variation. The invention is used in the field of fiber optic telecommunications.