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Regenerative laser amplifier

A technology of laser amplifiers and amplifiers, applied in lasers, laser components, phonon exciters, etc., can solve problems affecting the quality of lasers, achieve the effect of eliminating thermal depolarization effects and improving work quality

Inactive Publication Date: 2014-03-12
BEIJING GK LASER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The thermal depolarization effect greatly affects the quality of the laser

Method used

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0012] see figure 1 , a regenerative laser amplifier 100 provided in the first embodiment of the present invention, which can eliminate the thermal depolarization effect, the regenerative laser amplifier 100 includes a first polarizing beam splitter (Polarizing Beaming Splitter, PBS) 11, a half-wave plate 12. First optical rotator 13, second polarizing beam splitter 14, electro-optic crystal 15, quarter wave plate 16, first total reflection mirror 17, second optical rotator 18, amplifier 19, third optical rotator 110 , The second total reflection mirror 111.

[0013] The first polarizing beam splitter 11, the half-wave plate 12, the first optical rotator 13, the second polarizing beam splitter 14, the electro-optic crystal 15, the quarter-wave The sheet 16 and the first total reflection mirror 17 are sequentially arranged along the first direction. T...

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Abstract

A regenerative laser amplifier can remove heat depolarization effect and is provided with a resonant cavity formed by two all-trans mirrors. An amplifier is arranged in the resonant cavity and arranged on a light path between the two all-trans mirrors. Two rotation devices are further arranged in the resonant cavity and respectively placed on two sides of the amplifier and in the light path between the two all-trans mirrors, and each rotation device can enable polarization direction of laser lighting to the inside of the rotation device to generate 45-degree deflection. The regenerative laser amplifier can enable polarization state of laser entering and leaving the regenerative laser amplifier not to be changed, remove the heat depolarization effect of working media in the laser amplifier, and improve laser quality.

Description

technical field [0001] The invention relates to a regenerative laser amplifier, in particular to a regenerative laser amplifier capable of eliminating thermal depolarization effect. Background technique [0002] During the operation of the laser, most of the pumping energy is converted into heat and dissipated in the laser crystal. Reasons such as uneven pumping and heat transfer cause uneven temperature distribution inside the crystal, forming thermal stress, and causing changes in the refractive index of the crystal. The distribution is not uniform, making the isotropic laser medium anisotropic. When the laser passes through the anisotropic refractive index medium, the laser wavefront will be distorted, and the linearly polarized light will produce thermal depolarization effect after it is incident on the stressed birefringent laser medium. The thermal depolarization effect greatly affects the quality of the laser. [0003] Therefore, how to eliminate the thermal depolar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/086H01S3/107
Inventor 樊仲维邱基斯唐熊忻连富强
Owner BEIJING GK LASER TECH
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