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Functional module and method for suppressing waveform distortion

A waveform distortion and functional module technology, applied in the laser field, can solve the problems of increasing the complexity of the system structure, the large loss of the electro-optical modulator, and the drop of the seed optical power, and achieve the effects of simple structure, improved pulse distortion, and high gain suppression

Inactive Publication Date: 2021-03-30
SHANGHAI FEIBO LASER TECH CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electro-optic modulator will introduce a large loss and high cost. The high loss will lead to a decrease in the power of the seed light entering the amplifier. To obtain a high-power pulsed laser output, a multi-stage pre-amplifier must be added, which will increase the complexity of the system structure. and reduce reliability

Method used

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  • Functional module and method for suppressing waveform distortion
  • Functional module and method for suppressing waveform distortion
  • Functional module and method for suppressing waveform distortion

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Embodiment

[0034] Such as Figure 5 As shown, a functional module for suppressing waveform distortion includes a pulse input module 1 for emitting seed light; in this embodiment, the pulse input module 1 includes a semiconductor laser and its driving board;

[0035] The waveform distortion suppression module 2: used to adjust the rising edge of the input pulse, and then suppress the waveform distortion; in this embodiment, it includes a function generator 2-1 (the function is an exponential function) and a pulse rising edge editor 2-2 ;

[0036] The function generator 2-1 is as Image 6 As shown, it includes the "switch group" 2-1-1 for generating time delay (the number of switch groups is N=7, the more the number of switches, the higher the function accuracy), and the "switch group" for superimposing signals with different time delays Signal Adder" 2-1-2, and "Low Pass Filter" 2-1-3 for filtering out noise. Set the closing time and current of each switch through the "Switch Group", a...

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Abstract

A functional module for suppressing waveform distortion is characterized by comprising a pulse input module, a waveform distortion suppression module and a pulse amplification module. According to thepresent invention, by editing a pulse rising edge as a specific function, the rising edge is slowed down, the time for the rising edge to absorb the number of reversed particles in an amplifier is prolonged, and the gains of the front edge and the rear edge of the pulse are balanced, and thus, pulse distortion caused by gain difference is improved. The functional module has the advantages of being simple in structure, modular in function, high in integration level and low in cost and being easy to operate, and the output pulse waveform distortion can be effectively improved.

Description

technical field [0001] The invention relates to laser technology, in particular to a functional module and method for suppressing waveform distortion. Background technique [0002] High-power, long-pulse fiber lasers have great application prospects in 3D scanning, laser marking, atmospheric detection, laser cleaning and other fields. MOPA technology is to inject low-power laser as seed light into the fiber amplifier with large mode field diameter, and obtain high-power laser output with the same wavelength through power amplification. This technology can obtain high-power laser output with flexible and adjustable repetition frequency and pulse width. The output laser wavelength, repetition frequency, spectral width and time-domain pulse width are all determined by the seed source, and the task of achieving high power is mainly entrusted to Amplifier is a very effective technical means to obtain high-power pulses. [0003] However, in the fiber amplifier, more inversion pa...

Claims

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Application Information

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IPC IPC(8): H01S3/131H01S3/00H03K3/02
CPCH01S3/0014H01S3/0057H01S3/0085H01S3/1312H03K3/02
Inventor 谭小妹刘赟李文涛关珮雯
Owner SHANGHAI FEIBO LASER TECH CO LTD
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