External-cavity laser tuned by physically-deformable distributed Bragg reflector

摘要

The external cavity laser includes a resonant cavity defined at one end by a Bragg reflector and a gain medium located in the optical cavity. Coupled to the Bragg reflector is an actuator that changes the pitch of the Bragg reflector and, hence, the wavelength at which the optical cavity is resonant. The wavelength of the light generated by the external cavity laser can therefore be tuned by a single control signal applied to the actuator.