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Liquid crystal spatial modulation regenerative amplifier

A regenerative amplifier and spatial modulator technology, applied in the laser field, can solve the problems of limiting laser power energy, increasing laser difficulty, and easily surpassing devices, etc., to achieve high power, inhibit self-focusing efficiency, and high laser output.

Active Publication Date: 2015-07-08
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This strong point generated by the self-focusing of the Gaussian beam can easily exceed the damage threshold of the device, resulting in damage to the device, increasing the difficulty of further laser amplification, and limiting the increase in laser power and energy.

Method used

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  • Liquid crystal spatial modulation regenerative amplifier
  • Liquid crystal spatial modulation regenerative amplifier
  • Liquid crystal spatial modulation regenerative amplifier

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Embodiment 1

[0031] Example 1, such as Figure 1-3 As shown, a liquid crystal spatially modulated regenerative amplifier described in an embodiment of the present invention includes:

[0032] The box body has an incident seed light inlet 4 on the left side panel, and an outgoing amplified light outlet 5 on the right side panel of the box body;

[0033] Optical components, which are arranged in the box, including an optical isolator 1, a regenerative resonant amplifier cavity 2 and a 45° total reflection mirror 3;

[0034] Wherein, the optical isolator 1 includes a first polarizer 11, a Faraday rotator 12 and a half-wave plate 13 arranged in sequence on the optical path;

[0035] The regenerative resonant amplifying cavity 2 includes a second polarizer 21, a pulse selection switch 22, a 0° pan mirror 23, a third polarizer 24, an LD pump laser crystal module 25, a first quarter-wave plate 26, and a concave lens 27 , a beam expander 28, a liquid crystal spatial modulator and its driver 29; ...

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Abstract

The invention discloses a liquid crystal spatial modulation regenerative amplifier. The liquid crystal spatial modulation regenerative amplifier comprises a box and an optical assembly. A left side plate of the box is provided with an incident seed light inlet, and a right side plate is provided with an emitting amplification light outlet. The optical assembly is arranged in the box and comprises a light isolator, a regenerative resonance amplification cavity and a 45-degree total reflector. The light isolator comprises a first polarization piece, a Faraday rotator and a half wave plate. The regenerative resonance amplification cavity comprises a second polarization piece, a pulse selective switch, a 0-degree total reflector, a third polarization piece, an LD pumping laser crystal module, a first quarter wave plate, a concave lens, a beam expander, a liquid crystal space modulator and a drive of the liquid crystal space modulator. The liquid crystal spatial modulation regenerative amplifier has the advantages that the liquid crystal space modulator is placed in a regenerative resonance amplification cavity, modulation control over amplification light spots is achieved, Gaussian beam light spots are modulated into flat top type or U-shaped light spots, the self-focusing phenomenon is avoided, the energy of gain media is extracted, higher-energy regenerative amplification light output is obtained, and a preparation is made for further amplification of laser energy.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a liquid crystal space modulation regenerative amplifier. Background technique [0002] Ultra-short ultra-intense pulse lasers have been widely used in laser ranging, radar, biology, laser spectroscopy, photoelectric sampling technology, communication technology, optical holographic storage technology, laser nuclear fusion, ultra-fine processing and blinding weapons. . [0003] Usually, the repetition frequency of the laser pulse directly generated by the seed optical oscillation level is 100 megahertz, and the single pulse energy is low, which is on the order of nanojoules, which limits its application in some fields. In order to obtain ultra-short and ultra-intense laser pulse output, it is necessary to amplify the oscillation-level seed light pulse. There are generally two methods for amplifying the oscillation-level seed light pulse: traveling wave amplification and regenera...

Claims

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Application Information

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IPC IPC(8): G02F1/133G02F1/09G02F1/39G02B27/09G02B27/10H01S3/107H01S3/08
CPCG02F1/39H01S3/08H01S3/0941H01S3/107
Inventor 陈檬龙明亮李港
Owner BEIJING UNIV OF TECH
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