Laser wavelength periodic change device and method

A technology with periodic changes and laser wavelengths, applied in lasers, laser components, phonon exciters, etc., can solve problems such as dwelling, limited physical properties of optical fiber materials, complexity, etc., achieve peak power reduction, and avoid nonlinear effects , the effect of overcoming nonlinear effects

Active Publication Date: 2021-01-22
武汉光谷航天三江激光产业技术研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods are limited by the physical characteristics of optical fiber materials, and there is an obvious ceiling. Many technologies are still in the laboratory stage due to their complexity.

Method used

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  • Laser wavelength periodic change device and method
  • Laser wavelength periodic change device and method
  • Laser wavelength periodic change device and method

Examples

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Embodiment 1

[0056] see first figure 1 , figure 1 It is an example of a device for periodically changing the wavelength of a laser. A continuous fiber laser with an output power of 100mW, a central wavelength of 1064nm, a 3dB linewidth of 2nm, and a beam quality close to the diffraction limit, together with an electro-optic intensity modulator and a collimated output head constitute a pulsed laser source. The electro-optic intensity modulator chops the output laser of the continuous fiber laser into a laser pulse sequence with a period of 1ns and an output power of 3mw (the laser passes through the electro-optical intensity modulator with loss) in time sequence. The shape of a single pulse is square wave and the pulse width is 0.1 ns. The laser pulse spot diameter finally output by the collimated output head is 3mm. The laser pulse passes through a 1760-line transmissive grating and then passes through a lens combination to achieve collimation output. The lens combination is composed of...

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Abstract

The invention belongs to the field of laser signal processing, and particularly discloses a laser wavelength periodic change device and method. The device comprises a pulse laser source, a dispersiondevice, a collimation device, a time delay device, a convergence device and an inverse dispersion device, wherein the pulse laser source is used for emitting laser pulses; the dispersion device is used for changing the emitting directions of lasers with different wavelengths in the laser pulse; the collimation device is used for collimating laser with different long emitting directions and different wavelengths into a group of parallel beams; the time delay device is used for carrying out time delay convergence on the laser in the parallel light beams; the convergence device is used for converging the delayed laser at the inverse dispersion device; and the inverse dispersion device is arranged at the focal point of the convergence device and is used for combining the laser with different wavelengths and different emitting directions converged by the convergence device into one beam and then emitting the beam. Phonons in a nonlinear effect can be effectively inhibited, the nonlinear effect is directly inhibited from a production mechanism, and a high-quality seed source required by amplification of a high-power fiber laser can be realized.

Description

technical field [0001] The invention belongs to the field of laser signal processing, and more specifically relates to a device and method for periodically changing laser wavelength. Background technique [0002] In order to support the development of science and technology and economic growth, in the fields of scientific research and industrial manufacturing, higher and higher requirements are put forward for the brightness of laser systems. Fiber lasers (including fiber amplifiers) have the advantages of good beam quality, compact structure, and high electro-optical conversion efficiency, and have been widely used in the field of high-brightness lasers. However, under high power conditions, single-wavelength fiber lasers are limited by nonlinear effects, making it difficult to further increase brightness. People generally suppress the nonlinear effect in fiber lasers by shortening the length of the fiber, increasing the size of the fiber, and designing a special waveguide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/094H01S3/10
CPCH01S3/06725H01S3/094076H01S3/10023
Inventor 刘厚康武春风李强姜永亮宋祥胡阿健王玉雷吕亮胡金萌
Owner 武汉光谷航天三江激光产业技术研究院有限公司
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