A Method for Generating Mid-Wave Infrared Laser Output Using Parameter Conversion Technology
An infrared laser and parameter conversion technology, which is applied in optics, nonlinear optics, instruments, etc., can solve problems such as strict phase matching requirements, and achieve the effects of good long-term stability, high optical frequency conversion efficiency, and adjustable wavelength
Active Publication Date: 2017-12-15
ZHEJIANG UNIV
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Problems solved by technology
[0006] The purpose of the present invention is to address the related problems in the actual use of the current optical parametric conversion technology, make full use of the characteristics of the optical parametric amplification technology, and adopt a new technical method to completely solve the problem that the conventional parametric amplification technology requires very strict phase matching, so that A new laser frequency conversion system with high laser conversion efficiency, adjustable laser output wavelength, compact system structure, reliable performance, good environmental stability, and high power output can be obtained, which can be widely used in the development of various mid-wave infrared lasers
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[0014] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0015] Such as figure 1 As shown, a pulsed fiber laser 1 outputs a high-power single-wavelength laser; the laser output of the pulsed fiber laser 1 directly enters the spectral broadening optical fiber 2 at the rear end through the connecting optical fiber to perform spectral broadening; The output enters the fiber laser amplifier 3 at the back end through the connecting optical fiber to amplify the laser power; the amplified laser is coupled to the nonlinear laser crystal 5 through the lens 4 to realize parametric amplification and generate high-power mid-wave infrared laser output .
[0016] The pulsed fiber laser 1 is a pulsed fiber laser with a relatively high peak power and a laser wavelength between 1010nm and 1120nm.
[0017] The spectrum broadening fiber 2 is a microstructured photonic crystal fiber or an ordinary single-mode silica ...
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Abstract
The invention discloses a method for generating a medium-wave infrared laser output with a parametric conversion method. A pulsed fiber laser is used as a pump source and a non-linear laser crystal is used as a device for optical frequency conversion. Firstly, the spectrum of the pulsed fiber laser is spread, the laser with the spectrum spread is used as a seed laser to be further subjected to power amplification in a secondary optical fiber amplifier, an optical fiber laser output containing high-power pump laser with certain wavelength and a medium-power broadband spectrum laser is acquired from the same optical fiber, and the optical fiber laser output is focused to the non-linear laser crystal by an optical lens to generate the efficient medium-wave infrared laser output. The method has the characteristics that the laser conversion efficiency is high, the laser output wavelength is adjustable, the system structure is compact, the performance is reliable, the environmental stability is good and the high-power output requirement is met, and has high application value.
Description
technical field [0001] The invention relates to a new laser generating method, in particular to a laser generating method in the mid-wave infrared band. Background technique [0002] Mid-wave infrared lasers with laser wavelengths in the 2-5 micron band have important application values in the fields of biomedicine, environmental monitoring and national defense. 3.6 micron and 3.8 micron are very good atmospheric window bands, the laser in this band has good transmittance in the atmosphere, it is a good band for laser signal transmission, suitable for space laser transmission; 2.9 micron wavelength laser has a Strong absorption, so the depth of laser action is small, easy to control the working part, and the hemostatic ability is relatively strong. It is a high-quality laser scalpel; there are a large number of intrinsic absorption peaks of gas molecules in the spectral band of 3-5 microns, Therefore, it has the characteristics of high absorption intensity and narrow spec...
Claims
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IPC IPC(8): G02F1/355G02F1/365G02F1/39
CPCG02F1/3553G02F1/365G02F1/395G02F1/392
Inventor 沈永行姜培培吴波
Owner ZHEJIANG UNIV