TEMPERATURE COMPENSATING BRAGG GRATING OPTICAL DEVICE

摘要

An apparatus comprising a light guide (110) incorporating a Bragg grating. The apparatus also comprises a moveable wall portion which is coupled to the Bragg grating (108) so that a movement of the wall portion causes a force that effects a change in strain of the Bragg grating and thereby effects a change in an optical period of the Bragg grating. A temperature related change in the optical period of the Bragg grating is reduced by a temperature related change in the force on the Bragg grating by the moveable wall portion.