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A laser-damage-resistant solid-state laser resonator

A technology of solid-state lasers and resonators, which is applied to the structure/shape of lasers, laser components, and optical resonators, can solve problems such as damage to optical film components, and achieve the effect of increasing the anti-damage threshold

Active Publication Date: 2019-01-08
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: aiming at the problem that the optical film layer in the existing solid-state laser is easy to cause damage to the components, the present invention proposes a solid-state laser resonator that is resistant to laser damage, and uses the Brewster angle to achieve alignment Polarized light is highly transparent, using a total reflection prism to achieve high reflection, and using the principle of different angles of incidence to achieve different transmittance laser output, forming a resonant cavity

Method used

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  • A laser-damage-resistant solid-state laser resonator
  • A laser-damage-resistant solid-state laser resonator
  • A laser-damage-resistant solid-state laser resonator

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Embodiment

[0051] The first total reflection prism 1 and the second total reflection prism 4 are rectangular prisms cut at the Brewster angle. The material of the prisms is quartz crystal. The direction of the crystal optical axis is the y direction. The angle of incidence on is Brewster's angle;

[0052] The angle θ of the incident surface of the prism is:

[0053] θ=90-θ B =33.2°

[0054] According to the refractive index of quartz crystal, the phase difference caused by two total reflections can be calculated for:

[0055]

[0056] The phase difference caused by the difference in refractive index between o-ray and e-ray inside the crystal for:

[0057]

[0058] According to the following relationship:

[0059]

[0060] Available:

[0061] L=(0.942+n·π),(n=0,±1,±2...)

[0062] Take n=3000, then L=10028.966um.

[0063] The laser gain medium 2 is made of Nd:YAG material, the refractive index is 1.82, the incident angle is selected to be 61.26°, and the number of total...

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Abstract

The invention relates to a laser damage resistant solid-state laser resonator, comprising a first total reflection prism (1), a laser gain medium (2), a coupling output prism (3), and a second total reflection prism (4). In order to solve the problem that the reliability of laser is not high due to the damage of optical element film, The invention adopts all optical elements which are not coated as resonant cavity elements, realizes high transmission, high reflection and specific proportion transmission of laser light through special design material and incident angle, thereby realizing oscillation output of laser light, so that laser damage threshold of laser light can be greatly increased, and laser reliability can be further improved.

Description

technical field [0001] The invention relates to a laser-damage-resistant solid-state laser resonator, belonging to the technical field of lasers. Background technique [0002] In general solid-state laser resonators, in order to ensure that the resonator outputs laser light as efficiently as possible, the intracavity loss should be as small as possible, that is, the transmission loss of the components used in the resonator on the optical path should be as small as possible. The general method is to coat almost the entire optical surface with an optical film, to coat the surface of the transmissive optical element with an anti-reflection coating (Anti-Reflection coating), and to coat the surface of the reflective optical element with a high-reflection coating (High-Reflection coating). For example: the light-transmitting surface of the laser crystal needs to be coated with an anti-reflection coating (after coating, the reflectivity R≤0.2%), and the total reflection cavity mir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/081H01S3/08G02B5/04
CPCG02B5/04H01S3/08059H01S3/081
Inventor 颜凡江李梦龙史文宗罗萍萍杨超桑思晗蒙裴贝
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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