an acousto - optic q - switch consisting of an acoustic transducer and an acoustic absorber affixed in opposing relationship with a portion of a laser medium having a relatively high figure of merit , m , disposed therebetween , provides an integral structural combination for the function of the laser medium and q - switch which avoids the resonating wave power losses , and eliminates the problem of reflection and alignment encountered in laser systems employing acousto - optic q - switching devices which are separate and spaced apart from the laser medium .