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Laser transmitting radial polarized beams based on conical uniaxial crystal

A uniaxial crystal and laser technology, applied in the field of lasers, can solve problems such as high cost and complex manufacturing process of grating mirrors, and achieve high work efficiency, high peak power pulse operation, and simple and compact structure

Active Publication Date: 2014-06-25
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

However, the manufacturing process of the grating mirror that can realize the mode selection of radially polarized light is relatively complicated and the cost is high. At present, there is no related localized product

Method used

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  • Laser transmitting radial polarized beams based on conical uniaxial crystal
  • Laser transmitting radial polarized beams based on conical uniaxial crystal
  • Laser transmitting radial polarized beams based on conical uniaxial crystal

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Embodiment Construction

[0023] Such as figure 1 As shown, a laser based on a conical uniaxial crystal outputting a radially polarized beam comprises: a uniaxial crystal conical mirror 1, a laser gain medium 2, a planar output coupling mirror 3 and a pumping source 4, and the The laser gain medium 2 is located between the bottom surface of the uniaxial crystal conical mirror 1 and the plane output coupling mirror 3, and the apex angle of the uniaxial crystal conical mirror 1 where n o and n e Respectively make the uniaxial crystal conical reflector 1 of the uniaxial crystal e-ray and o-ray main axis refractive index, the uniaxial crystal n o and n e The following conditions should be met:

[0024] arctan n e n o > arcsin 1 n o .

[0025] The arrow in the cavity marks the resonant circuit of t...

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Abstract

A laser transmitting radial polarized beams based on a conical uniaxial crystal comprises a uniaxial crystal conical reflector, a laser gain medium, a plane output coupling mirror and a pumping source. The laser gain medium is located between the bottom face of the uniaxial crystal conical reflector and the plane output coupling mirror. The no and ne in the formula of the top angle of the uniaxial crystal conical reflector are the main axis refractive indexes of extraordinary light and ordinary light of the uniaxial crystal forming the uniaxial crystal conical reflector respectively, and no and ne of the uniaxial crystal meet the following condition that arc tan(ne / no) is arc sin(1 / no). The laser has the advantages of being simple in structure, good in system stability, high in laser efficiency, high in output power and good in quality of the beams.

Description

technical field [0001] The invention relates to a laser, in particular to a laser outputting a radially polarized light beam based on a conical uniaxial crystal. Background technique [0002] A radially polarized beam is a vector polarized beam whose intensity and polarization direction are axisymmetric and the polarization direction at any point is along the radial direction. Due to a series of unique properties, radially polarized beams have broad application prospects in high-resolution imaging, laser photography, biomedicine, electron acceleration, and material processing. [0003] There are currently two main methods for generating radially polarized beams. One method is to passively convert linearly polarized light or other forms of polarized light into radially polarized light outside the laser cavity. Such methods mainly include interference superposition method, wave plate spatial transformation delay method, spiral gradient phase retarder or liquid crystal polari...

Claims

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Application Information

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IPC IPC(8): H01S3/101H01S3/11H01S3/098
Inventor 韩侠辉李建郎
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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