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A system for generating a medium-wave infrared laser output with a wavelength of not less than 3.8 microns by using a laser differential frequency technology

An infrared laser and laser technology, which is applied in the direction of lasers, laser components, and the structure/shape of the active medium, can solve the problem of high pump peak power requirements, and achieve compact structure, high optical frequency conversion efficiency, and reduced complexity. Effect

Inactive Publication Date: 2019-01-04
HANGZHOU LASER SPECTRUM PHOTONICS
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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a method for producing a mid-wave infrared laser output with a wavelength not less than 3.8 microns by using the laser difference frequency technology. By analyzing the characteristics of the laser difference frequency technology, a method of red-shifting the pump light wavelength is adopted. To obtain high peak power signal light, to solve the existing problem of excessive peak power of pump light for difference frequency

Method used

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  • A system for generating a medium-wave infrared laser output with a wavelength of not less than 3.8 microns by using a laser differential frequency technology
  • A system for generating a medium-wave infrared laser output with a wavelength of not less than 3.8 microns by using a laser differential frequency technology

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Embodiment 1

[0020] Such as figure 1 As shown, a system that uses laser difference frequency technology to generate mid-wave infrared laser output with a wavelength of not less than 3.8 microns, including an ytterbium-doped fiber laser 1 with a wavelength range of 1093-1105nm, and an erbium-doped fiber laser with a wavelength range of 1535-1540nm 2. Fiber beam combiner 3, optical lens 4, nonlinear laser crystal 5, ytterbium-doped fiber laser 1 as a pump source, erbium-doped fiber laser 2 as a signal source, nonlinear laser crystal 5 as an optical frequency conversion device, continuous or The pulsed ytterbium-doped fiber laser 1 and erbium-doped fiber laser 2 respectively output two single-wavelength lasers, which are combined by the fiber beam combiner 3 and then focused by the optical lens 4 to the nonlinear laser crystal 5, using laser difference frequency technology Generate mid-wave infrared laser output with a wavelength not less than 3.8 microns.

[0021] Wherein, the optical fiber...

Embodiment 2

[0023] Such as figure 2 As shown, a system that uses laser difference frequency technology to generate mid-wave infrared laser output with a wavelength of not less than 3.8 microns, including an ytterbium-doped fiber laser 1 with a wavelength range of 1093-1105nm, and an erbium-doped fiber laser with a wavelength range of 1535-1540nm 2. The first optical lens 6, the second optical lens 7, the spatial beam combiner 8, the third optical lens 9, the nonlinear laser crystal 5, the ytterbium-doped fiber laser 1 as the pump source, and the erbium-doped fiber laser 2 as the signal source, The nonlinear laser crystal 5 is used as an optical frequency conversion device, and the continuous or pulsed ytterbium-doped fiber laser 1 and the erbium-doped fiber laser 2 respectively output two single-wavelength lasers, which pass through the first optical lens 6 and the second optical lens 7 respectively. After collimation, the beams are combined by the spatial beam combiner 8, and then focus...

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Abstract

The invention discloses a system for generating medium-wave infrared laser output with a wavelength of not less than 3.8 microns by using a laser differential frequency technology, which utilizes a Yb-doped fiber laser with a wavelength of between 1093 and 1000 nm as pump source, an erbium-doped fiber laser with a wavelength of 1535 to 1540 nm as a signal source, and a nonlinear laser crystal as adevice for optical frequency conversion. After optical fiber beam combining or spatial beam combining, a CW or pulsed Yb-doped fiber laser and the corresponding erbium-doped fiber laser are focused by an optical lens to the nonlinear laser crystal to produce a high efficient medium-wave infrared laser output with a wavelength of not less than 3.8 microns. The invention has the characteristics ofdifference frequency laser output wavelength of not less than 3.8 micron, high laser conversion efficiency, compact system structure, reliable performance, good environmental stability, and suitability for high power output, and has wide application value.

Description

technical field [0001] The invention relates to the technical field of mid-wave infrared laser generation, in particular to a system for generating mid-wave infrared laser output with a wavelength not less than 3.8 microns by using laser difference frequency technology. Background technique [0002] The laser wavelength in the spectral band of 3-5 microns has the characteristics of large absorption intensity and narrow spectral lines due to the existence of a large number of intrinsic absorption peaks of gas molecules, which is very suitable for the detection of trace or trace gas components. In addition, the laser in the 3-5 micron band coincides with the window band of the infrared guided missile and can be used for in-band interference, so it is an effective laser for electro-optical countermeasures. At present, there are many technical means to produce mid-wave infrared. Available solid-state laser devices include quantum cascade semiconductor lasers, optical parametric ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/108H01S3/067H01S3/094
CPCH01S3/108H01S3/06716H01S3/094042H01S3/1083
Inventor 沈永行姜培培何文平吴波
Owner HANGZHOU LASER SPECTRUM PHOTONICS
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