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A dual-band laser based on electro-optic crystals to realize fast switching output of mid- and long-wave infrared

An electro-optic crystal and fast switching technology, applied in the field of optics, can solve the problem of difficult to achieve two-band laser switching output, and achieve the effect of full utilization and high beam quality

Active Publication Date: 2021-03-23
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that most of the existing high-power mid- and long-wave infrared lasers can only output laser in a single band, and it is difficult to realize the switching output of two-band lasers. band laser

Method used

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  • A dual-band laser based on electro-optic crystals to realize fast switching output of mid- and long-wave infrared

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specific Embodiment approach 1

[0028] Specific implementation mode one: the following combination figure 1 Explain that this embodiment is a dual-band laser based on electro-optic crystals to realize fast switching output of medium and long-wave infrared, which includes No. 1 plano-convex lens 1-1, No. 2 plano-convex lens 1-2, No. 3 plano-convex lens 1-3, No. 4 Plano-convex lens 1-4, electro-optic crystal 2, No. 1 polarizer 3-1, No. 2 polarizer 3-2, No. 3 polarizer 3-3, No. 1 half-wave plate 4-1, No. 2 half-wave One-wave plate 4-2, No. 1 / 2 wave plate 4-3, No. 1 pump light total reflection mirror 5-1, No. 2 pump light total reflection mirror 5-2, No. 1 first cavity mirror 6-1, No. 2 first cavity mirror 6-2, No. 3 first cavity mirror 6-3, No. 1 ZnGeP 2 Crystal 7-1, No. 2 ZnGeP 2 Crystal 7-2, No. 3 ZnGeP 2 Crystal 7-3, No. 4 ZnGeP 2 Crystal 7-4, No. 5 ZnGeP 2 Crystal 7-5, first output mirror 8, No. 1 first dichromatic mirror 9-1, No. 2 first dichromatic mirror 9-2, first filter mirror 10, No. 1 second cavit...

specific Embodiment approach 2

[0056] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the No. 1 plano-convex lens 1-1, the No. 2 plano-convex lens 1-2, the No. 3 plano-convex lens 1-3 and the No. 4 plano-convex lens 1- The 4 optical surfaces are all coated with 2μm anti-reflection coating, the focal length is 10mm-1000mm, and the diameter is 10mm-100mm. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0057] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the electro-optic crystal 2 is pure lithium niobate crystal or MgO with a MgO doping concentration of 0.1 at.% to 5.0 at.%. : LN crystal, the crystal is Z-axis cut, the crystal cross-section is 4mm×8mm, the crystal length is 30mm-100mm, and both ends of the crystal are coated with 2μm anti-reflection coating; the No. 1 ZnGeP 2 Crystal 7-1 and No.2 ZnGeP 2 The transparent surface of the crystal 7-2 is coated with a 2.1 μm anti-reflection coating and a 3 μm-5 μm anti-reflection coating at the same time; the No. 3 ZnGeP 2 Crystal 7-3 and ZnGeP No. 5 2 The transparent surface of crystal 7-5 is coated with 2.1 μm antireflection coating, 2.5 μm ~ 2.9 μm antireflection coating and 8 μm ~ 10 μm antireflection coating; the No. 4 ZnGeP 2 The light-transmitting surface of crystal 7-4 is coated with 2.5 μm-2.9 μm anti-reflection coating, 4.0 μm-4.5 μm anti-reflection coating and 8 μm-10 μm anti-ref...

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Abstract

The invention discloses a dual-waveband laser for realizing medium-long wave infrared rapid switching output based on an electro-optical crystal, belongs to the field of optics, and solves the problems that most of the existing high-power medium-long wave infrared lasers can only output laser of a single waveband and the switching output of laser of two wavebands is difficult to realize. The lasercomprises four plano-convex lenses, electro-optical crystal, three polarizers, three half wave plates, two pump light total reflection mirrors, three first cavity mirrors, five ZnGeP<2> crystals, a first output mirror, two first dichroic mirrors, a first filter lens, three second cavity mirrors, a second output mirror, a total reflection mirror, a second dichroic mirror, a third dichroic mirror,a second filter lens, three third cavity mirrors, a third output mirror and a third filter lens. The invention is used for the dual-band laser for realizing medium-long wave infrared rapid switching output based on the electro-optical crystal.

Description

technical field [0001] The present invention belongs to the field of optics. Background technique [0002] The mid-wave infrared laser with a wavelength of 3 μm to 5 μm and the long-wave infrared laser with a wavelength of 8 μm to 10 μm belong to the atmospheric window range and the human eye safety range, and are widely used in laser spectroscopy, laser guidance, photoelectric countermeasures, laser medical treatment, and environmental monitoring. important application. [0003] The main method to obtain high-power 3μm~5μm and 8μm~10μm band lasers is zinc phosphorus germanium (ZGP)-optical parametric oscillator (OPO). ZGP crystal has very high nonlinear coefficient, excellent mechanical properties and thermodynamic properties, is It is the first-choice crystal for generating laser light in the 3μm-5μm and 8μm-10μm bands. Using a 2.1 μm Ho:YAG pulsed laser as a pump source to pump ZGP crystals with different cutting angles, laser outputs in the 3 μm to 5 μm and 8 μm to 10 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/10H01S3/107
CPCH01S3/10061H01S3/107
Inventor 姚宝权密淑一陈毅刘高佑李俊辉
Owner HARBIN INST OF TECH