METHOD AND DEVICE FOR TUNING BRAGG GRATINGS

摘要

A method and a device for tuning a Bragg grating in an optical fiber is disclosed. Tuning of the grating is obtained by applying current to at least one longitudinal, internal electrode arranged along the core of the fiber. When current is passed through the electrode, thermal expansion occurs that produces a stress on the fiber core. At the same time, the temperature of the core is increased. This leads to an electrically controlled tuning of the Bragg grating.