Control of acousto-optic mode locker by means of electronic matching circuit

An acousto-optic (AO) mode locker (AOML) operating in a standing wave mode has a fixed working frequency, defined by the length of the crystal, which makes the device prone to temperature variations. In this study we examine the effect of the electrical matching circuit parameters on the acoustic resonances and AO diffraction in the AOML both theoretically and experimentally. Acoustical and electrical models of the AOML are introduced. We outline the ways of utilizing this effect for compensation of ill thermal influence. Our analysis allows to broaden the temperature and driving power domains of an AO mode locker's reliable operation without a heat sink or a complicated temperature stabilization system.