pulsed laser oscillator, in single longitudinal mode stabilized frequency, and corresponding operating method.

摘要

Operating method of a pulsed laser oscillator in single longitudinal mode stabilized frequency laser oscillator comprising a cavity (1) resonant including a material (6) active located on an optical axis between at least two mirrors (3, 4), said method: illuminating said material (6) active with a continuous laser beam coming from the system (20) outside the cavity (1) resonant to perform the operation of the laser oscillator in single longitudinal mode, energization of said material (6) active to stimulate to emit radiation of pulsed laser formed by a succession of laser output pulses (out) directed towards one (4) of said mirrors (3, 4) and out of the cavity (1) resonating through said mirror (4) the method the following steps, comprising: modulating the length of the cavity (1) at a resonant phase search transmission peak of said continuous laser beam by said cavity (1) in resonant or n time (T) between the generation of a pulse of said succession of pulses and the next pulse, said search phase comprising the detection of said continuous laser beam transmitted by the cavity (1) resonating through the other (3 ) of said mirrors (3, 4) of the cavity, the measurement of a signal corresponding to the continuous laser beam detected, the memorization of said measurement and the transmission of a control signal to the transducer (5) piezoceramic for movement by at least the said mirror (4), processing of the measurements and selection of the position of at least the said mirror (4) corresponding to the peak of detected transmission cavity (1) resonating during the search phase, taking place said processing before a positioning phase, a phase of positioning at least the said mirror (4) for controlling the length of the cavity (1) resonant in response to information derived from said fa is search, said positioning phase comprising the movement of at least said mirror (4) varying the length of the cavity (1) resonant bear corresponding selected position to detect the transmission peak of the cavity (1) resonant characterized in that only the measurements obtained in said search phase by moving the transducer (5) piezoceramic in the same direction as the movement used in the positioning phase are used for said selection of the position of at least said mirror ( 4) corresponding to the detected peak transmission cavity (1) resonant.