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Self-frequency doubling laser with function of single beam laser output or linear laser output

A self-frequency doubling and laser technology, used in lasers, laser parts, phonon exciters, etc., can solve the problems of large longitudinal thermal gradient and low self-frequency doubling efficiency, reduce the internal thermal gradient and facilitate efficient heat dissipation , Conducive to the effect of precise temperature control

Active Publication Date: 2011-05-25
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the longitudinal thermal gradient in the current self-frequency doubling laser crystal is large and the efficiency of self-frequency doubling is not high; thereby providing a self-frequency doubling crystal designed into a strip shape, so that the laser travels along the "one" in the crystal. Self-frequency-doubling lasers with single-beam laser output or line-array output with "" or "zigzag" propagation

Method used

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  • Self-frequency doubling laser with function of single beam laser output or linear laser output
  • Self-frequency doubling laser with function of single beam laser output or linear laser output
  • Self-frequency doubling laser with function of single beam laser output or linear laser output

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Embodiment 1

[0042] refer to figure 1 , In this embodiment, a slab self-frequency doubling laser based on Nd:YCOB crystal is produced, and the intracavity laser propagates along the "one" shape in the crystal to realize a single laser beam output.

[0043] Self-frequency doubling crystal 1 adopts Nd:YCOB crystal with a doping concentration of 8at.%. The self-frequency doubling crystal is made into a strip shape of length L×width W×thickness H, that is, processed into 5×1×3mm 3 The slab shape, the horizontal direction (along the length L direction) of the self-frequency doubling crystal 1 is the phase matching direction with the largest effective nonlinear coefficient. The end faces 11 at both ends of the slats of the self-frequency doubling crystal are optically polished and coated with a film with high transmission for the fundamental frequency light and the frequency doubling light.

[0044] The first crystal cooling and temperature control device 3-01 in this embodiment adopts a common...

Embodiment 2

[0048] see figure 2 In this embodiment, a solid-state laser based on a slab-shaped Nd:YCOB self-frequency-doubling crystal is manufactured. The intracavity laser propagates along a zigzag in the crystal, and the frequency-doubled light exits at the output mirror A, realizing a single beam laser output.

[0049] The first substrate 2-01 and the second substrate 2-02 are a piece of H f o 2 Plate material; the size of the first substrate 2-01 and the second substrate 2-02 is equal to the size of the self-frequency doubling crystal 1 . The first crystal cooling temperature control device 3-01 and the second crystal cooling temperature control device 3-02 are conventional crystal cooling temperature control devices purchased on the market. The first pumping source 4-01 and the second pumping source 4-02 with a center wavelength near 811nm are used, such as semiconductor lasers. The first pump source cooling device 5-01 and the second pump source cooling device 5-02 are support...

Embodiment 3

[0056] In this embodiment, a slab self-frequency doubling laser based on Nd:GdCOB crystal is fabricated. This embodiment is similar to Embodiment 2, and the intracavity laser propagates along a zigzag shape in the crystal to realize linear array output. The difference with the structure of embodiment 2 is mainly:

[0057] One is that the self-frequency doubling crystal material adopts Nd:GdCOB crystal with a doping concentration of 8at.%.

[0058] The second is that the pumping method is changed from the front and rear side pumping in Embodiment 2 to the end face pumping at both ends of the slat, that is, the first pumping source 4-01 and the second pumping source 4-02 are respectively aligned with the self-folding The end faces 11 at both ends of the frequency crystal serve as laser pumping incident faces.

[0059] The third is that the emission direction of the frequency doubling light is changed from the emission along the left and right end faces in the embodiment 2 to t...

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Abstract

The invention provides a self-frequency doubling laser with function of single beam laser output or linear laser output. The self-frequency doubling laser comprises pumping sources, an optical crystal, laser resonators and crystal cooling and temperature control devices with functions of heat dissipation and temperature control, wherein the two end faces of a slab of the self-frequency doubling crystal are optically polished and plated with high fundamental frequency laser and frequency doubling laser transmissive films; one surface of the slab-shaped self-frequency doubling crystal is placed on the first crystal cooling and temperature control device; the pumping sources at least aim at one surface of the self-frequency doubling crystal and enter; high pump light transmissive films are plated on the parts where the pump light enters; the pump light carries out pumping and is fully absorbed; and the fundamental frequency laser and the frequency doubling laser are ensured to be propagated in the crystal in the shape like a Chinese character yi or zhi, thus implementing single beam laser output or linear laser output. The laser provided by the invention has the following advantages: enlarging the effective cooling area of the crystal, being beneficial to efficient heat dissipation and accurate temperature control of the crystal, reducing the internal heat gradient of the crystal and ensuring the frequency doubling process to better meet the phase matching requirement. Besides, the laser can implement single beam laser output or linear laser output.

Description

technical field [0001] The invention relates to the field of all-solid-state lasers, in particular to a solid-state laser based on a slab-shaped self-frequency doubling crystal and having a single-beam laser output or a line-array laser output. Background technique [0002] Some crystals not only have nonlinear characteristics, can perform nonlinear frequency conversion, but also can be used as laser gain materials when rare earth active ions are doped in this matrix. This kind of composite functional crystal can be used to generate fundamental frequency laser, and double the frequency of the fundamental frequency light through its own nonlinear effect, so as to generate frequency doubled laser output, so it is called self frequency doubling crystal. Lasers based on self-frequency doubling crystals are called self-frequency doubling lasers. Because of its strong composite function, compact structure and high stability, it is favored by people. [0003] At present, self-fre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/16H01S3/109H01S3/102H01S3/042H01S3/06H01S3/082
Inventor 许祖彦宗楠韩琳王保山彭钦军王继扬张怀金王正平于浩海蒋民华
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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