Nd YCOB crystal micro lens self-doubled frequency green laser

A neodymium calcium borate, self-frequency doubling technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problem that hinders laser self-frequency doubling crystals from becoming practical, NYAB crystals have poor optical uniformity, and cannot meet the requirements of commercialization and other problems, to achieve the effect of simple structure, lower production cost and high conversion efficiency

Inactive Publication Date: 2008-08-06
SHANDONG UNIV
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AI Technical Summary

Problems solved by technology

But since YAB(YAl(BO 3 ) 4 ) and NAB (NdAl(BO 3 ) 4 ) have different crystal structures, resulting in poor optical uniformity of NYAB crystals, making it difficult to grow high-quality NYAB crystals, which cannot meet the requirements of commercialization
Due to Nd:Mg:LiNbO 3 These fatal defects of the NYAB and NYAB crystals hinder the practical use of these two laser self-frequency doubling crystals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: A kind of neodymium-doped calcium yttrium oxygen borate crystal microchip self-frequency doubling green laser, with laser diode (LD) as pumping source, with Nd:YCOB as laser working material; Nd:YCOB according to the phase of crystal Cut into microchips in the matching direction, polish both ends of the crystal microchip, and then coat the dielectric film; use the pump source to directly pump the end face of the Nd:YCOB crystal microchip to generate self-frequency doubled green light output.

[0017] Described Nd:YCOB crystal body has following general formula: Nd x Y 1-x Ca 4 O(BO 3 ) 3 , x=0.001-0.2; the crystal has a nonlinear effect and can realize self-frequency doubling laser output.

[0018] The phase matching direction when the Nd:YCOB crystal is cut is the self-frequency doubling direction of the Nd:YCOB crystal, which is cut in the direction of θ=90° and β=35°.

[0019] The light-transmitting surface of the Nd:YCOB crystal microchip is squar...

Embodiment 2

[0023] A kind of neodymium-doped calcium borate yttrium oxygen crystal microchip self-frequency doubling green laser, the pump source and the laser working substance are the same as in Example 1, the difference is that the Nd: YCOB crystal is cut according to θ=65°, β = 36.5°direction cutting.

Embodiment 3

[0024] Embodiment 3: A kind of Nd-doped calcium yttrium borate crystal microchip self-frequency doubling green laser, laser working material and cutting, coating are the same as embodiment 1 or embodiment 2, the difference is that the pumping source is An 811nm Ti:Sapphire laser was used as the pump source.

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Abstract

The invention provides a Nd:YCOB crystal micro-disc self-doubling-frequency green laser, belonging to the element field. The Nd:YCOB crystal has the nonlinear effect and has a general expression of Ndxy(1-x)Ca4o(BO3)3, where x ranges from 0.001 to 0.2. The crystal takes the YCOB as the ground mass and takes an LD or a Ti:sapphire laser as a pump source; the crystal makes Nd ions to generate the laser oscillation with 1.06 mu m and generates green output by the YCOB crystal nonlinear effect. The micro-disc self-doubling-frequency green element made of the crystal has the characteristics of simple and compact structure, small volume, small consumption, good stability, high transfer efficiency, good beam quality, simple operation, low cost, etc. Moreover, the laser can realize the miniaturization, the integration and the practicability and is convenient for the industrialized mass production.

Description

technical field [0001] The invention relates to a neodymium-doped calcium yttrium borate crystal microchip self-frequency doubling green light laser, which belongs to the technical field of laser devices. Background technique [0002] Visible wavelength lasers are widely used in full-color display, medical treatment, printing, entertainment and scientific research. At present, the way for people to obtain green light is to use Nd 3+ corresponding 4 f 3 / 2 → 4 f 11 / 2 The four-level structural transition produces a spectral line to obtain a 1.06 μm laser output. The frequency-doubled crystal KTP or LBO is used to modulate the generated 1.06 μm laser to obtain a frequency-doubled 0.53 μm green light output. In low and medium power green light output, Nd:YVO is usually used 4 +KTP way to produce, namely Nd:YVO 4 It is combined with the KTP crystal through optical glue, and the glued crystal is coated with a film to make it a cavity mirror for laser oscillation. This metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/094H01S3/0941H01S3/06H01S3/16H01S3/08H01S3/109
Inventor 王继扬张怀金蒋民华
Owner SHANDONG UNIV
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