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Novel 1.54 mu m waveband rare earth ion activated gadolinium gallium garnet laser crystal

A technology of gadolinium gallium garnet and laser crystals, which is applied in the field of laser crystal materials, can solve the problems of low thermal-optical effect and less research on laser crystals

Inactive Publication Date: 2009-03-04
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 2. Low thermo-optic effect:
[0018] Apparently, Gd 3 Ga 5 o 12 It is an excellent laser host crystal, Yb:Er:Ce:Gd 3 Ga 5 o 12 It will also be a new type of high-quality laser crystal in the 1.54μm band, but for the use of Gd 3 Ga 5 o 12 Laser crystals as host materials, the focus of current research is mainly on high-power heat capacity laser crystals activated by Nd and Yb, for other active ion-doped Gd 3 Ga 5 o 12 Laser crystals are less studied, especially for Yb 3+ :Er 3 + : Ce 3+ Doped Gd 3 Ga 5 o 12 Laser crystals, there are no research reports at home and abroad

Method used

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  • Novel 1.54 mu m waveband rare earth ion activated gadolinium gallium garnet laser crystal
  • Novel 1.54 mu m waveband rare earth ion activated gadolinium gallium garnet laser crystal

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Experimental program
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Effect test

Embodiment 1

[0026] Embodiment one: Yb:Er:Ce:Gd 3 Ga 5 o 12 Crystal Growth Preparation

[0027] The instrument used for crystal pulling method growth is DJL-400 intermediate frequency pulling furnace, and the model of intermediate frequency power supply is KGPF25-0.3-2.5. Use Pt / Pt-Rh thermocouple and type 815EPC ohmmeter for temperature control. The crucible used is an iridium crucible of Φ55mm×30mm, and the raw material used is 4N grade Gd 2 o 3 , Ga 2 o 3 、Er 2 o 3 , CeO 2 , Yb 2 o 3 . Prepare raw materials according to the following chemical reaction formula:

[0028]

[0029] x=1at%~30at%; y=1at%~50at%; z=1at%~50at%. Mix the raw materials evenly, press them into flakes, place them in a platinum crucible, and slowly raise the temperature at 150°C / h to the predetermined temperature for sintering, and repeat this process until the X-ray powder diffraction results remain unchanged.

[0030] Put the raw materials into the iridium crucible of Φ55mm×30mm. In order to avoid ...

Embodiment 2

[0031] Embodiment two: Yb:Er:Ce:Gd 3 Ga 5 o 12 Crystal Laser Experiments

[0032] Process high-quality Yb with a size of 5mm×5mm×5mm 3+ :Er 3+ : Ce 3+ :Gd 3 Ga 5 o 12 For crystal devices, LD diodes in the 980nm band are used as pumping sources for laser experiments. The experimental setup is shown in the attached figure. 1 in the figure is block Yb 3+ :Er 3+ : Ce 3+ :Gd 3 Ga 5 o 12 Crystal; 2 is the LD diode and its power supply; 3 is the dielectric mirror that fully reflects the λ=~1.54μm band and fully transmits the 980nm band; 4 is the dielectric mirror that partially transmits the λ=~1.54μm band; 5 is the LPE- 1A laser energy meter.

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Abstract

The invention relates to novel gadolinium gallium garnet laser crystal activated by 1.54mu m wave-band rare earth ion, which belongs to the field of laser crystal materials. The chemical formula of the laser crystal material is Yb: Er: Ce: Gd3Ga5O12. Super-fine powders of Ga2O3, Gd2O3, Er2O3, Yb2O3 and CeO2 serve as the raw material, and the Yb: Er: Ce: Gd3Ga5O12 raw material is obtained through a high-temperature solid phase reaction in reducing atmosphere like nitrogen; the crystal is grown through a pulling method in the reducing atmosphere like nitrogen. The material is used to output the 1.54mu m wave-band laser.

Description

technical field [0001] The invention relates to the field of laser crystal materials. Background technique [0002] The 1.5μm band laser is a light source that is safe for human eyes, and has a wide range of applications in optical communication, medical treatment, laser detection and ranging and other fields. [0003] Doped with Er 3+ Ionic 4 I 13 / 2 → 4 I 15 / 2 The transition can produce lasing in the ~1.5μm band, but its laser efficiency is very low, which is mainly due to the Er 3+ The efficiency of the ion absorption pump source is very low. For this reason, Yb can be co-doped 3+ ions to sensitize Er 3+ The ions are pumped by the LD laser pump source in the 980nm band to realize the Yb 3+ 2 f 5 / 2 →Er 3+ 4 I 11 / 2 energy transfer, thereby increasing the pumping efficiency. Because Er 3+ pump level 4 I 11 / 2 to laser upper level 4 I 13 / 2 The fluorescence branching ratio is only 10-20%, so in general, materials with high phonon energy are used as laser host ...

Claims

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Application Information

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IPC IPC(8): C30B29/28C30B15/00
Inventor 涂朝阳王燕朱昭捷游振宇李坚富
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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