Programmable ultrafast pulse laser generator

Abstract

The invention discloses a programmable ultrafast pulse laser generator. The programmable ultrafast pulse laser generator comprises an FPGA, the FPGA generates two paths of clock signals through a PLL, the two paths of clock signals are respectively CLK1 # and CLK2 #, the two paths of clock signals respectively provide clock signals for two laser driving chips, the two laser driving chips are respectively a laser driver 1 # and a laser driver 2 #, the laser driver 1 # can simultaneously generate SYNC synchronization signals, the laser driver 2 # can simultaneously generate SYNC synchronization signals, and the SYNC synchronization signals are used as laser Trigger signals of the laser driver 2 #. According to the programmable ultrafast pulse laser generator of the invention, a Kintex UltraScale + series FPGA of xilinx is adopted and is used for generating the programmable clock signals and laser pulse trigger signals; the advanced laser driving chips are adopted, the picosecond-level pulse width can be generated, and the pulse width can be programmed in an SPI / IIC mode; and an ultrafast VCSEL laser is adopted, and the ascending / descending time of the laser is in the picosecond order.

Description

technical field [0001] The invention belongs to the technical field of laser generators, in particular to a programmable ultrafast pulse laser generator. Background technique [0002] Working principle of lasers: Except for free electron lasers, the basic working principles of all kinds of lasers are the same. The essential conditions for laser generation are particle number inversion and gain greater than loss, so the essential components in the device include excitation (or pumping) source and working medium with metastable energy level. Excitation is the excitation of the working medium to an excited state after absorbing external energy, creating conditions for the realization and maintenance of particle population inversion. The excitation methods include optical excitation, electrical excitation, chemical excitation and nuclear energy excitation. The metastable energy level of the working medium makes the stimulated radiation dominant, thereby realizing light amplifi...

AI Technical Summary

Problems solved by technology

The output pulse dispersion can be tuned to pre-compensate the phase distortion downstream of the line and optimize the pulse distribution for specific applications, but it does not solve the problem that the rise / fall time of the existing laser generator of 1.5ns cannot meet the requirements of use (within 0.5ns); The pulse width cannot meet the requirement of 1ns step programmable pulse width; the laser repetition frequency cannot meet the problem of 300MHz, so we propose a programmable ultrafast pulse laser generator

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