ATHERMAL EXTERNAL CAVITY LASER

摘要

An athermal external cavity laser is provided to uniformly maintain an output wavelength by fixing external cavity modes irrespective of a temperature. An athermal external cavity laser includes a semiconductor amplifier(100), an optical fiber(300), and a thermosetting polymer(400). The optical fiber(300) has a core having a Bragg grating, and a clad which wraps the core. The thermosetting polymer(400) fixes the optical fiber(300) on a ferrule, and has a negative thermal optical coefficient. A thickness of the clad to wrap the core having the Bragg grating is thinner than the clad of other part. The thermosetting polymer(400) wraps the clad. A reflective spectrum of the Bragg grating is maintained by the thermosetting polymer(400) irrespective of a temperature. The external cavity laser has an output optical power irrespective of a temperature change.