the acousto-optic modulator regeneration start the program from the mode-locked laser

 the use of acousto-optic modulator regeneration start the program, that the acousto-optic modulator regeneration start the program from the mode-locked laser, an acousto-optic the reciprocal of the modulator, its frequency and the resonator cycle match an acoustic optical modulator, its frequency and the reciprocal of the resonator cycle matching the laser output for tens to hundreds of ps, the order of the pulse, out of tens to the order of hundreds of pulses, pulse repetition frequency magnitude pulse rate is decided by the modulator drive frequency, then the laser is actively mode-locked state. green laser pointer  company has advanced production departments. Appropriate adjustments to the cavity, the rate decision, then the laser is actively mode-locked state. Appropriate adjustments to the cavity, the laser into the self-clamping, resulting in the order of the mode-locked pulses of the pulse width fs, average power is almost not only to enter self mode locking, pulse width of the order of mode-locked pulse, change the order of mode-locked pulse . When the pulse repetition frequency is only decided by the cavity frequency has nothing to do with the modulator driving frequency At this time the pulse repetition frequency is only determined by the cavity frequency, and the modulator driving frequency, but the exact match of the two frequencies, the most stable state of the self-locking.Our  green laser pointer  company has been working for designing and manufacturing electronic products. Exact match of the two frequencies, the most stable state of the self-locking. You can take the output signal of the laser cavity frequency component (taking the second harmonic frequency and then a quarter of the frequency to drive the number of modulator frequency component to take the second harmonic frequency divided by four) to drive the modulator, so that retrieval of the second harmonic wave frequency and then to drive a quarter of the frequency modulator, the driving frequency of the controller can automatically match the cavity frequency.