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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 , the effect of increasing the effective cooling area

Active Publication Date: 2012-03-07
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI +1
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  • Summary
  • 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

Examples

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Embodiment 1

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

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

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

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 produced. The laser in the cavity propagates along the zigzag pattern in the crystal, and the frequency-doubled light is emitted at the end of the output mirror, achieving 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; the size of the first substrate 2-01 and the second substrate 2-02 are equal to the size of the self-frequency doubling crystal 1. The first crystal cooling and temperature control device 3-01 and the second crystal cooling and temperature control device 3-02 adopt conventional crystal cooling and temperature control devices purchased on the market. The first pump source 4-01 and the second pump source 4-02 with a center wavelength near 811 nm are used, such as semiconductor lasers. The first pump source heat dissipation device 5-01 and the second pump source heat d...

Embodiment 3

[0056] In this embodiment, a slab self-frequency-doubling laser based on Nd:GdCOB crystal is manufactured. This embodiment is similar to the second embodiment. The intracavity laser propagates in a zigzag pattern inside the crystal to realize linear array output. The main differences from the structure of Embodiment 2 are:

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

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

[0059] Third, the emission direction of the frequency-doubled light is changed from the emission along the left and right end faces in the second embodiment to the emission from the upper surface of the frequ...

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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 placedon 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 crystaland 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 laser output or a linear array laser output. Background technique [0002] Certain crystals not only have nonlinear characteristics and can perform nonlinear frequency conversion, but also can be used as laser gain materials when rare earth active ions are doped into this matrix. This kind of composite functional crystal can be used to generate fundamental frequency laser and multiply the fundamental frequency light through its own nonlinear effect to generate frequency doubled laser output, so it is called self-frequency doubled crystal. Lasers based on self-frequency doubling crystals are called self-frequency doubling lasers. It is favored by people because of its strong composite functionality, compact structure and high stability. [0003] At present, self-frequency doubled lasers ...

Claims

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Application Information

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Patent Type & Authority Patents(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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