A pulsed laser pump modulation method

Abstract

The invention relates to a pumping modulation mode of a pulse laser. The method specifically comprises the steps that a seed source signal triggers a pumping current, after a control board gives the seed source signal, the pumping current is triggered, but a practical seed source signal does not given immediately, a period of delay time is needed, and the delay time is related to a cut-off frequency corresponding to a waveform, and when the cut-off frequency is f Hz, the corresponding delay time is 1 / f s, and the practical seed source signal is enabled to be on the tail end of the work pumping current. The modulation mode provided by the invention has the following effects that the seed source triggers the pumping current, the possibility that the control of the laser is disordered, or the seed source is invalid and an optical path is damages is reduced; the laser can work at a lower frequency such as 1kHz; under the same pumping energy, a higher power is output, and the energy utilization is higher; under the same pumping energy, the peak power is higher, and the experience on the marking application is better; and under the same pumping energy, the reverse spectrum is smaller, and the safety and the stability are higher.

Description

technical field [0001] The invention relates to a pulse laser pump modulation method, which belongs to the technical field of laser pump modulation. Background technique [0002] When the laser is working, there is an upper limit for the peak power and single pulse energy that it can withstand. For pulsed lasers, under the same waveform, the lower the repetition frequency, the greater the corresponding peak power and pulse energy. When the peak power and pulse When the energy increases to the upper limit value, the repetition frequency of laser operation cannot be reduced in a conventional way. This lower limit frequency value is called the cut-off frequency or power reduction frequency of the laser. [0003] In order to make the laser work below the cutoff frequency, a corresponding pumping method is required to reduce the power of the laser at the cutoff frequency. At present, there are two main methods of application: [0004] Option 1: If figure 1 As shown, when the la...

AI Technical Summary

Problems solved by technology

This kind of scheme uses the seed source to trigger the primary and secondary working current, which has high reliability; it can still work stably when the frequency is reduced to 1kHz, but the energy utilization efficiency and working stability of this pumping method are not optimal.

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