Patent ID: 6560251
Filing Date: 2003-05-06
Classification: H01S

Abstract:
A light resonator stabilizing apparatus in an optical fiber laser, comprising:a non-linear optical amplitude loop mirror (NALM) for non-linearly amplifying a laser light provided by a pump laser; and a linear loop mirror coupled to said NALM by an optical coupler and constituting a closed loop for confining the laser light amplified by said NALM, wherein the linear loop mirror comprises a light isolator for proceeding the laser light confined by said linear loop mirror only in one direction; a light modulator for mode-locking the light within said linear loop mirror; an optical detector coupled to said linear loop mirror by an optical coupler for detecting the light proceeding in the direction opposite to the light proceeding direction regulated by said light isolator; a control circuit for generating an electrical control signal depending on the intensity of the light detected by the optical detector; a piezo-electric transducer (PZT) for receiving and processing the control signal from said control circuit and compensating for the length of said laser resonator so that the intensity of the light proceeding in the opposite direction is minimized.