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Ytterbium-calcium-lithium-niobium mixed garnet crystal and laser device

A technology of garnet and laser, which is applied in laser components, lasers, crystal growth, etc., can solve the problems of poor heat dissipation and achieve the effects of large emission cross-section, high quantum efficiency, and absorption bandwidth

Inactive Publication Date: 2007-03-07
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

End-pumping has the advantages of small crystal size, high optical coupling efficiency, and good match between pump light and laser mode, so the overall laser conversion efficiency is high, and it is easy to obtain high-beam quality laser output, but its disadvantage is poor heat dissipation , generally only work at low power levels

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: doped ytterbium calcium lithium niobium garnet crystal Yb:Ca 3 Li 0.25 Nb 1.775 Ga 2.95 o 12 (Yb:CLNGG), x=0.275, wherein the doping concentration of Yb is 5 at.%.

[0019] The crystals of the above components are grown by the pulling method, and the crystals are processed and polished. The crystals can be coated with 1035-1056nm anti-reflection coatings or not.

Embodiment 2

[0020] Embodiment 2: the laser device manufactured by the laser crystal of Embodiment 1, the 970nm semiconductor laser pumps the Yb:CLNGG crystal to realize the laser output of 1035-1056nm.

[0021] Example 1Yb: CLNGG crystal has a strong absorption peak near 970nm, and the bandwidth of the absorption peak reaches 20nm. The actual laser spectral lines that can be generated are in the range of 1010-1060nm, and the bandwidth can reach 50nm. The laser output in the range of 1035-1056nm can be realized by simple flat-concave resonator end-face pumping. The planar pump end mirror is coated with a dielectric film to make it highly transparent to the 970nm pump light and highly reflective to the 1010-1060nm oscillating light. The spherical output coupling mirror (curvature radius: <100mm) has a transmittance of T at ~1μm =0.5%-20%. The Yb:CLNGG crystal coated with anti-reflection coating is placed in the resonant cavity close to the pump end mirror, which constitutes a compact all-s...

Embodiment 3

[0022] Embodiment 3: the laser device manufactured by the laser crystal of Embodiment 1, the 936nm semiconductor laser pumps the Yb:CLNGG crystal to realize the laser output of 1035-1056nm.

[0023] Yb: CLNGG crystal also has a strong absorption peak near 936nm, and the bandwidth of the absorption peak reaches 40nm. For example, the coating of the pump end mirror in Example 1 is changed to high transmittance for pump light at 936nm and high reflection for oscillating light at 1010-1060nm, and the transmittance of the spherical output coupling mirror (radius of curvature: <100mm) at ~1μm It is T=0.5%-20%. The Yb:CNGG crystal coated with anti-reflection coating is placed in the resonator close to the pump end mirror to form a compact all-solid-state laser device. The pump end mirror can also be directly plated on one end face of the Yb:CLNGG crystal to make the device more miniaturized.

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PUM

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Abstract

The invention discloses an Yb-Ca-Li-Nb garnet crystal in the laser crystal and instrument domain, which possesses Yb: Ca3LixNb15+xGa3.5-2xO12 as general formula with Yb: CLNGG in short, wherein the X is 0-0.75; the Yb doping density is less than 30at.%; the Yb: CLNGG can be continuous and pulse laser instrument to prepare end surface pump, which forms laser instrument with acoustic-optic modulation Q, electrooptical modulation Q, negative modulation Q and lock mould.

Description

technical field [0001] The invention relates to an end-pumped laser crystal and a device, in particular to a ytterbium-doped calcium-lithium-niobium garnet crystal and a laser device. Background technique [0002] The use of ytterbium-doped laser crystals is the simplest and most compact means of semiconductor-pumped solids to produce ultrafast laser output. It is characterized by direct use of semiconductor lasers to pump laser crystals, coupled with laser resonators, can achieve high-efficiency laser output with wavelengths above 1 μm, and its output beam quality, directionality, and monochromaticity are better than near-infrared pump lasers. laser. After adding active and passive Q-switching components, trivial mode devices or nonlinear optical crystals, the Q-switching of fundamental frequency laser, ultrafast pulse laser output, or frequency doubled laser output can be realized, which is the best way to obtain pulse or ultrafast pulse laser output effective means. Th...

Claims

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Application Information

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IPC IPC(8): C30B29/28H01S3/16H01S3/06H01S3/08H01S3/094H01S3/0941H01S3/10H01S3/127H01S3/098
Inventor 张怀金刘均海王继扬陶绪堂蒋民华
Owner SHANDONG UNIV
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