Coherent synthesis of ultrashort pulse fiber laser based on balanced difference method

    At present, the ability of the coherent synthesis method of ultrashort pulse fiber laser to control the bandwidth is poor, resulting in the low output power of the far-field spot. There-fore, the balanced difference method is used to process the optical signal, improve the anti-interference of the signal, and make the coherent synthesis method of ultrashort pulse fiber laser have the ability of normal bandwidth control.
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    ORIGINAL POST
    By Fanglu LI
    components
    Hardware Components
    w5300
    X 1
    details

    Screenshot 2022-08-26 145117.png

    Coherent synthesis of ultrashort pulse fiber laser Photoelectric signal acquisition function design The preprocessing based on balanced difference method includes signal preprocessing
    module and data acquisition module, as shown in fig. 1.
    The whole signal processing part can be divided into two parts: signal preprocessing and data acquisition. The signal preprocessing is mainly realized by analog signal processing mode [5], including low-pass filter, measurement amplifier, programmable amplifier, add and subtract arithmetic, and band-pass filter. The digital signal processing mode selected by data acquisition circuit is mainly composed of data acquisition chip, signal input/output buffer, reset circuit, serial communication interface, etc.
    Design of data acquisition chip
    The AD conversion module is the core of data acquisition chip, which has a great impact on the overall performance. At present, there are many kinds of AD conversion methods with
    different performances, mainly including the following types: double oblique integration, successive approximation, and lightning type AD conversion. Among them, the lightning AD conversion mode has the fastest speed and the most expensive price, but the lightning AD conversion mode usually has low accuracy and resolution, so it is not suitable to be used in the high accuracy sampling module [6]. The double oblique integral type has high accuracy and low price, but its speed is slow and it is different.
    After W5300 initialization, it can respond to Ping request, and then complete the initialization of socket to be used for communication. Set the socket port number, destination hardware address, destination port number, destination IP address, interrupt mask register and mode register, and W5300 can carry out data transmission of Ethernet.
    Conclusion
    This paper designs the coherent synthesis method of ultrashort pulse fiber laserbased on the balanced difference method. By using the balanced difference method to process the photoelectric signal, the accuracy of the signal can be guaranteed, and the problems existing in the traditional coherent synthesis method of ultrashort pulse fiber laser can be solved, which will provide some help for the follow-up research of ultrashort pulse fiber laser and promote the development of laser technology.But in this study, the experimental test index is less, not applied in practical operation, in the future development, further improve here.

    Screenshot 2022-08-26 145117.png

    Coherent synthesis of ultrashort pulse fiber laser Photoelectric signal acquisition function design The preprocessing based on balanced difference method includes signal preprocessing
    module and data acquisition module, as shown in fig. 1.
    The whole signal processing part can be divided into two parts: signal preprocessing and data acquisition. The signal preprocessing is mainly realized by analog signal processing mode [5], including low-pass filter, measurement amplifier, programmable amplifier, add and subtract arithmetic, and band-pass filter. The digital signal processing mode selected by data acquisition circuit is mainly composed of data acquisition chip, signal input/output buffer, reset circuit, serial communication interface, etc.
    Design of data acquisition chip
    The AD conversion module is the core of data acquisition chip, which has a great impact on the overall performance. At present, there are many kinds of AD conversion methods with
    different performances, mainly including the following types: double oblique integration, successive approximation, and lightning type AD conversion. Among them, the lightning AD conversion mode has the fastest speed and the most expensive price, but the lightning AD conversion mode usually has low accuracy and resolution, so it is not suitable to be used in the high accuracy sampling module [6]. The double oblique integral type has high accuracy and low price, but its speed is slow and it is different.
    After W5300 initialization, it can respond to Ping request, and then complete the initialization of socket to be used for communication. Set the socket port number, destination hardware address, destination port number, destination IP address, interrupt mask register and mode register, and W5300 can carry out data transmission of Ethernet.
    Conclusion
    This paper designs the coherent synthesis method of ultrashort pulse fiber laserbased on the balanced difference method. By using the balanced difference method to process the photoelectric signal, the accuracy of the signal can be guaranteed, and the problems existing in the traditional coherent synthesis method of ultrashort pulse fiber laser can be solved, which will provide some help for the follow-up research of ultrashort pulse fiber laser and promote the development of laser technology.But in this study, the experimental test index is less, not applied in practical operation, in the future development, further improve here.

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