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Laser device outputting 1064nm tunable Laguerre-Gaussian beams

A laser and beam technology, applied in lasers, laser parts, laser parts, etc., can solve the problems of poor Laguerre Gaussian beam quality and complex cavity structure, and achieve excellent mode distribution, high purity, and high slope efficiency. Effect

Active Publication Date: 2018-01-09
NANJING UNIV
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Problems solved by technology

[0005] Purpose of the invention: The present invention provides a tunable Laguerre-Gaussian (LG) beam outputting 1064nm for problems such as poor quality, high threshold, and complex cavity structure of the Laguerre-Gaussian (LG) beam generated by the intracavity method in the prior art. Laser, realizing low threshold, high slope efficiency, high purity, angular index l tunable LG laser output

Method used

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  • Laser device outputting 1064nm tunable Laguerre-Gaussian beams
  • Laser device outputting 1064nm tunable Laguerre-Gaussian beams
  • Laser device outputting 1064nm tunable Laguerre-Gaussian beams

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Embodiment Construction

[0032] figure 1 A schematic diagram of the optical path structure of the laser output 1064nm tunable Laguerre Gaussian beam provided by the present invention, the laser is a solid-state laser, such as figure 1As shown, it includes an 808nm laser diode 1, a fiber coupler 2, a coated cavity mirror 3, a gain crystal 4, a cooling device 5, a polarizing element 6, and a vortex half-wave plate (l=1, l= 2) 7 and pinhole 8. Wherein, the fiber coupler 2 includes a beam coupling amplification system for adjusting the beam waist of the 808nm laser beam, and the pumping power is 0.3-3.5W. The coated cavity mirror 3 includes a coated front cavity mirror 31, a coated focusing lens 32 and a coated rear cavity mirror 33, the three form a resonant cavity, the coated front cavity mirror 31 is coated on the front end of the gain crystal 4, and the coated focusing lens 32 is located between the polarizing element 6 and Between the vortex half-wave plates 7, the coated cavity mirror 33 is locate...

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Abstract

The invention discloses a laser device outputting 1064nm tunable Laguerre-Gaussian beams. The laser device outputting the 1064nm tunable Laguerre-Gaussian beams comprises a 808nm laser diode, an optical fiber coupler, a film coated endoscope, a gain crystal, a heat dissipation device, a polarizing element, a scroll half wave plate and a pinhole, which are arranged along the direction of light propagation; and the film coated endoscope comprises a film coated front endoscope, a film coated focusing lens and a film coated back endoscope, which form a resonant cavity. By means of the laser deviceoutputting the 1064nm tunable Laguerre-Gaussian beams, the output of the 1064nm tunable Laguerre-Gaussian beams with low threshold, high skew efficiency, high purity and tunable angular Index l is realized.

Description

technical field [0001] The invention relates to a solid continuous laser, in particular to a laser outputting 1064nm tunable Laguerre-Gauss beams. Background technique [0002] The Laguerre-Gaussian (LG) mode is the eigensolution of the paraxial approximate wave equation in the cylindrical coordinate system, and the LG beams of different modes are distinguished by the angular index l and the radial index p, namely model. Let p = 0, we can get pattern of beams. Such beams carry optical orbital angular momentum l, and have important applications in the fields of quantum optics, optical manipulation, material processing, and optical space multiplexing communication. Beams have obvious advantages in the application of various fields, such as the ability to prepare nanoscale chiral structures that are difficult to achieve with advanced chemical methods. thus obtaining high beam quality The light beam became the focus of the study. [0003] Currently, the most straightfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/08H01S3/042H01S3/04
Inventor 程月魏敦钊张勇
Owner NANJING UNIV
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