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Erbium-doped lithium niobate crystal and preparation method thereof

A lithium niobate and crystal technology, which is applied in the field of erbium-doped lithium niobate crystals, can solve the problems of low laser gain, hindering the practical use of light sources, and not using optical fiber communication systems.

Inactive Publication Date: 2009-11-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, these laser sources have not been used in fiber optic communication systems
In addition to the insertion loss issue, the low available laser gain (approx. 1dB / cm) is an important issue hindering the practical application of these light sources

Method used

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  • Erbium-doped lithium niobate crystal and preparation method thereof
  • Erbium-doped lithium niobate crystal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The specific steps of this embodiment include: 1) with 99.99wt% MgO, 99.99wt% Er 2 o 3 , 99.99wt% Nb 2 o 5 , 99.99wt% LiCO 3 As the basic raw material, the doping amount of MgO is 2mol%, Er 2 o 3 The doping amount is 1mol%, and the Li / Nb molar ratio=0.75, weighs each raw material respectively with this, and the total weight is 200g, fully mixes for standby; 2) Put the mixed raw material into the Pt crucible, adopt traditional The crystal growth is carried out by the pulling method, and the key parameters are: the pulling speed is 1mm / h, the axial temperature is 35°C / cm, and the rotation speed is 12rpm. The grown crystals are all light pink, with a diameter of 30mm and a height of 20mm. Growth stripes , High-quality crystals without cracks; 3) All crystals are heated at a temperature of 1200°C and a current density of 5mA / cm 2 Polarization under certain conditions; 4) Cut the crystal into the used wafer according to 10mm×10mm×3mm (Z×X×Y), and polish it with high pr...

Embodiment 2

[0014] The specific steps of this embodiment are the same as in Example 1, except that the specific steps include: 1) with 99.99wt% MgO, 99.99wt% Er 2 o 3 , 99.99wt% Nb 2 o 5 , 99.99wt% LiCO 3 As the basic raw material, the doping amount of MgO is 2.5mol%, Er 2 o 3 The doping amount is 2mol%, and the Li / Nb molar ratio=0.70, each raw material is weighed respectively with this, and total weight is 200g, fully mixes for standby; 2) Put the mixed raw material into the Pt crucible, adopt traditional The crystal growth is carried out by the pulling method, and the key parameters are: the pulling speed is 0.9mm / h, the axial temperature is 40°C / cm, and the rotation speed is 15rpm. The grown crystals are all light pink, and the diameter is 30mm, and the height is 20mm. High-quality crystals with growth streaks and no cracks.

Embodiment 3

[0016] The specific steps of this embodiment are the same as in Example 1, except that the specific steps include: 1) with 99.99wt% MgO, 99.99wt% Er 2 o 3 , 99.99wt% Nb 2 o 5 , 99.99wt% LiCO 3 As the basic raw material, the doping amount of MgO is 3mol%, Er 2 o 3 The doping amount is 3mol%, and the Li / Nb molar ratio=0.73, weighs each raw material respectively with this, and the total weight is 200g, fully mixes for standby; 2) Put the mixed raw material into the Pt crucible, adopt traditional The crystal growth is carried out by the pulling method, and the key parameters are: the pulling speed is 0.8mm / h, the axial temperature is 43°C / cm, and the rotation speed is 11rpm. The grown crystals are all light pink, and the diameter is 30mm, and the height is 20mm. High-quality crystals with growth streaks and no cracks.

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Abstract

The invention provides an erbium-doped lithium niobate crystal and a preparation method thereof; the preparation method comprises the step of taking 99.99 percent of MgO, 99.99 percent of Er2O3, 99.99 percent of Nb2O5 and 99.99 percent of LiCO3 by weight percentage as raw materials, wherein the doping quantities of MgO, Er2O3 and Li / Nb are respectively 0-8mol%, 1-4mol% and 0.946-0.65mol%. The invention comprehensively utilizes the two means of doping of photo-damage resistant elements and growth of stoichiometric ratio, and simultaneously realizes the Er ion low-cluster concentration and strong photo-damage resistance of the lithium niobate crystal which is a substrate material for an active optical waveguide device, thereby obtaining the significantly improved optical emission property with a wave band of 1.5Mum and promoting the advancement of the active LN optical waveguide device to a practical use stage.

Description

(1) Technical field [0001] The invention relates to laser light source technology, in particular to an erbium-doped lithium niobate crystal. (2) Technical background [0002] In the past ten years, with the waveguide structure LiNbO 3 The continuous breakthroughs in technology and the significant increase in functionality of optoelectronic devices have made people see their extremely broad development prospects and have attracted widespread attention. Researchers at home and abroad reported Ti:Er:LiNbO working continuously in the 1550nm region 3 (same composition as LiNbO 3 Substrate) waveguide lasers, optical amplifiers and various optical integrated devices including mode-locking, tuning, Q-switching, distributed Bragg (DBR) and distributed feedback (DFB) waveguide lasers and various nonlinear integrated optical frequency conversion devices. But so far, these laser sources have not been used in fiber optic communication systems. In addition to the insertion loss issue,...

Claims

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Application Information

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IPC IPC(8): C30B29/30C30B15/00
Inventor 孙亮杨春晖徐超夏士兴马天慧王猛孙彧邱海龙葛士彬郝素伟吕维强
Owner HARBIN INST OF TECH
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