Self-adaptive driving device based on pyramid prism coherent synthesis laser

Self-adaptive driving device based on pyramid prism coherent synthesis laser

  • CN 107,248,693 B
  • Filed: 06/08/2017
  • Issued: 10/16/2020
  • Est. Priority Date: 06/08/2017
  • Status: Active Grant
First Claim
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1. A self-adaptive driving device based on a pyramid prism coherent synthesis laser comprises a coherent synthesis laser (1) and is characterized by further comprising a signal acquisition module (2), a signal processing module (3), a signal operation module (4) and a signal power amplification module (5), wherein the coherent synthesis laser (1) comprises a plurality of laser media (101) and pumping sources (102) corresponding to the laser media (101), each laser medium (101) is arranged between an output mirror (103) and a pyramid prism (104), laser generated by the laser media (101) is injected into the corresponding laser medium (101) after being reflected by the pyramid prism (104), and the output mirror (103) outputs coherent laser,the signal acquisition module (2) converts each path of coherent laser into a coherent laser electric signal and outputs the coherent laser electric signal to the signal processing module (3);

  • the signal processing module (3) filters the coherent laser electric signal to obtain a coherent laser frequency square wave;

    the signal operation module (4) calculates the phase difference of each coherent laser through the head wave time of each coherent laser frequency square wave;

    according to the phase difference of each coherent laser, compensating the pumping driving signal of the pumping source (102) corresponding to each coherent laser to obtain a compensated pumping driving signal, and outputting the compensated pumping driving signal to a signal power amplification module (5);

    the signal power amplification module (5) drives the pump source (102) according to the compensated pump driving signal so that the phase difference of each coherent laser is reduced,the number of the signal operation modules (4) corresponds to the number of paths of coherent lasers, each signal operation module (4) comprises a trigger unit (401), a counting unit (402) and a pumping drive signal generating unit (403), coherent laser frequency square waves are input into the trigger unit (401), the counting unit (402) calculates the time difference of the time of triggering the trigger unit (401) by the first wave of each coherent laser frequency square wave relative to the reference time so as to obtain the phase difference of each coherent laser, the pumping drive signal generating unit (403) compensates the pumping drive signal of the pumping source (102) corresponding to each coherent laser according to the phase difference of each coherent laser to obtain a compensated pumping drive signal, and the compensated pumping drive signal is output to the signal power amplification module (5) through an isolation unit (404),the number of the signal acquisition modules (2) corresponds to the number of paths of coherent laser, each signal acquisition module (2) comprises an optical filter (201), a first differential photodiode (202), a second differential photodiode (203) and an operational amplifier (204), the first differential photodiode (202) and the second differential photodiode (203) respectively acquire the same coherent laser after natural light is filtered by the optical filter (201) and convert the same coherent laser into a difference signal to be output to the operational amplifier (204), the operational amplifier (204) amplifies the difference signal to obtain a coherent laser electric signal and outputs the coherent laser electric signal to the signal processing module (3),the number of the signal processing modules (3) corresponds to the number of paths of coherent laser, each signal processing module (3) comprises a filter (301) and a comparator (302), coherent laser electric signals are input into the comparator (302) after being filtered by the filter (301), and the comparator (302) compares the filtered coherent laser electric signals with a set threshold value to obtain coherent laser frequency square waves.

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