METHOD FOR REDUCING SELF-MIXING INTERFERENCE EFFECT OF LASER SYSTEM

摘要

A method for reducing a self-mixing interference effect of a laser system comprises the following steps: separately connect a direct-current bias circuit (2) and a modulation signal generator (3) to an electrode of a laser (1), the direct-current bias circuit (2) being used for driving the laser (1) and supplying pumping carriers to the laser (1); arrange a resonant cavity in the laser (1), the resonant cavity converts the pumping carriers into photons and is subjected to stimulated radiation to form a stable laser output, and the direct-current bias circuit (2) and the modulation signal generator (3) are introduced into the laser (1); and the modulation signal generator (3) outputs modulation signals, the modulation signals match parasitic parameters of the laser (1) so as to change the distribution state of the photons in the resonant cavity of the laser (1). By means of the method, the power fluctuation of the laser (1) within a short time caused by the self-mixing interference effect is reduced in space and time, thereby ensuring the stability of the whole laser system; the advantages of low cost, easy assembling and adjustment, stable performance and the like are achieved.