Integrated real-time spectrum broadening module with spectrum pattern capable of being flexibly designed

Abstract

The invention discloses an integrated real-time spectrum broadening module with a flexibly-designed spectrum pattern. The integrated real-time spectrum broadening module comprises a seed source, a phase modulator driving signal generation module, a radio frequency power amplifier and a phase modulator. The phase modulator driving signal generation module is composed of an FPGA chip and a DAC chip. The FPGA chip comprises a phase-locked loop unit, a data generation unit and two parallel-serial conversion units; the data generation unit generates a plurality of pieces of serial data in parallel in real time according to the sampling rate of the DAC chip and a data generation clock and divides the serial data into two groups, data splicing is performed in each group, and the two pieces of data obtained through splicing are respectively input into the corresponding parallel-serial conversion unit and are input into the DAC chip as data input after parallel-serial conversion; the DAC chip converts a digital signal into an analog signal according to data input and data clock input, the analog signal is amplified by the radio frequency power amplifier and then drives the phase modulator, and then spectrum broadening is carried out on a polarization-maintaining narrow-linewidth continuous laser signal input into the phase modulator. According to the invention, flexible design and integration of the spectrum broadening module are realized.

Description

technical field [0001] The invention relates to the field of spectral broadening of laser signals, in particular to an integrated spectral broadening module for real-time generation of a phase modulation signal whose spectral type can be flexibly designed. Background technique [0002] Ultra-high power CW fiber laser has the advantages of high power, high reliability, high beam quality and convenient thermal management, etc., and has a wide range of applications in industrial processing, military attack and defense and other fields. In the military field, as the core part of laser weapons, high-power fiber lasers have the characteristics of smaller volume and lower energy consumption than solid-state lasers, which can solve the problem of fixed installation and expand their application to mobile carriers such as aircraft and ships. Therefore, many countries are advancing the development of laser weapons and increasing research efforts on high-power continuous fiber lasers, a...

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Problems solved by technology

[0005] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide an integrated real-time spectral broadening module with flexible spectral design, so as to solve the problem that the driving signal of the existing phase modulator uses a white noise source, so that the spectral type is single and random. The uncertainty of the signal is too strong, the uncertainty of the signal is large, and it is impossible to realize the flexible design of the spectrum and the deterministic problem

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