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Self-frequency-doubling all-solid-state yellow-light laser

A self-frequency doubling and laser technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of long growth period, complex laser cavity structure, and difficulty in meeting the needs of mass production, so as to reduce production difficulty, The effect of reducing production costs and reducing costs

Active Publication Date: 2015-11-18
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The longest ytterbium ion-doped aluminum yttrium tetraborate self-frequency doubling yellow-green light obtained so far is 569nm (OpticsCommunications207,315,2002), and this band requires a complex tuning process to achieve, and the laser cavity structure is complex; at the same time, aluminum yttrium tetraborate The crystal needs to be grown by the flux method, and the growth cycle is long, which is difficult to meet the needs of mass production

Method used

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  • Self-frequency-doubling all-solid-state yellow-light laser
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  • Self-frequency-doubling all-solid-state yellow-light laser

Examples

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Effect test

Embodiment 1

[0041] Example 1: A self-frequency doubling yellow laser that realizes 570nm yellow laser output

[0042] structured as figure 1 As shown, it consists of an excitation source 1, a laser focusing system 2, an input mirror 3, a self-frequency doubling crystal ytterbium-doped calcium oxyyttrium borate crystal 4, and an output mirror 5 arranged in sequence along the optical path.

[0043] The excitation source 1 is a laser diode with an emission wavelength of 976nm. The laser focusing system 2 is two focusing mirrors with a focal length of 2cm. The input mirror 3 is a flat mirror. 1200nm and 555nm-600nm highly reflective dielectric film;

[0044] The ytterbium-doped calcium borate yttrium yttrium crystal 4 has a ytterbium ion doping concentration of 20%, is cut along the phase matching direction with the largest effective nonlinear coefficient at 1140 nm, and has a length of 8 mm. The transparent surface is polished and plated to 900- 1200nm and 555nm-600nm high transmission die...

Embodiment 2

[0048] As described in Embodiment 1, the difference is that the excitation source 3 is a titanium sapphire laser, the emission wavelength is 900nm, the length of the ytterbium-doped calcium yttrium borate crystal is 20mm, and the cutting angle: (120 ± 1°) with the Z axis, At -(34°±2°) with the X axis, the focusing system consists of two convex lenses with focal lengths of 10cm and 5cm. What is achieved is a yellow laser output with a wavelength of 590nm

Embodiment 3

[0050] As described in Embodiment 1, the difference is that the self-frequency-doubling crystal is ytterbium-doped calcium-gadolinium borate crystal, and the doping concentration of ytterbium ions is 1%. The light transmission direction of the crystal is the phase matching direction with the largest effective nonlinear coefficient at 1180nm, that is, the cutting angle is (120°±1°) with the Z axis and -(46°±2°) with the X axis, and the wavelength is 580nm yellow laser output.

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Abstract

The invention relates to a self-frequency-doubling all-solid-state yellow-light laser. The laser comprises an excitation source, a focusing system, a self-frequency-doubling crystal and a laser resonator, wherein the self-frequency-doubling crystal is a ytterbium-ions-doped rare-earth calcium oxoborate crystal and is cut along the maximum direction of the effective nonlinear coefficient of a non main plane of the crystal; the excitation source is a 900-980nm light source; and the laser resonator is composed of an input cavity mirror and an output cavity mirror, the input cavity mirror and the output cavity mirror are each provided with a medium membrane for inhibiting vibration of a 1020-1080nm wave band, excitation light is subjected to collimating focusing and is injected into the self-frequency-doubling crystal through the input cavity mirror, the self-frequency-doubling crystal absorbs energy of the excitation light to generate fundamental frequency light in the laser resonator, and the fundamental frequency light carries out selection wavelength frequency multiplication through the self-frequency-doubling crystal so that 570-590nm yellow-light laser is output. The laser provided by the invention has the advantages of high output power, simple and compact structure, low cost, high temperature adaptability and the like.

Description

technical field [0001] The invention relates to a self-frequency doubling yellow laser, which belongs to the field of laser technology, and relates to lasers and nonlinear crystal devices. Background technique [0002] Yellow light refers to light with a wavelength between 570nm and 590nm, which belongs to the visible region and has important applications and demands in medical, entertainment, military, environmental monitoring and other fields. At present, the technologies for realizing all-solid-state yellow light, especially yellow laser, include nonlinear sum frequency, frequency doubling after Raman frequency shift, or Raman frequency shift after laser frequency doubling. Among them, the nonlinear sum frequency technology uses the 1.06μm and 1.3μm emission of neodymium ion-doped laser materials, and realizes the output of yellow light in the form of extracavity sum frequency or intracavity sum frequency through nonlinear optical crystals, whether it is extracavity or ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/30H01S3/0941H01S3/109H01S3/16
Inventor 于浩海张怀金王继扬路庆明
Owner SHANDONG UNIV
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