Annealing method for improving laser output power of Nd3+:YAG crystal

A technology of output power and crystal, which is applied in the field of laser crystal annealing treatment, can solve the problems of long annealing process cycle, increased heating time and cooling time, oxygen molecules cannot diffuse, etc., achieve a reasonable constant temperature and constant temperature time, increase the heating rate and Effects of lowering temperature, shortening heating time and cooling time

CN106048733AInactive Publication Date: 2016-10-26成都新源汇博光电科技有限公司
9 Cites 3 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-10-26
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses an annealing method for improving laser output power of Nd3+:YAG crystal. The annealing method comprises the following steps of 1, putting an Nd3+:YAG crystal bar into a vacuum annealing furnace, and vacuumizing the vacuum annealing furnace to 0.08MPa by a vacuum pump; 2, opening an air inflation device, supplying a mixture gas of nitrogen and oxygen into the vacuum annealing furnace by a vacuum pipe, and maintaining the air pressure in the vacuum annealing furnace to 0MPa; 3, after the step 2 is finished, increasing the temperature in the vacuum annealing furnace to 1250-1300 DEG C; 4, maintaining the temperature in the vacuum annealing furnace to 1250-1300 DEG C; 5, after the step 4 is completed, lowering the temperature in the vacuum annealing furnace to 800 DEG C, and naturally cooling to the room temperature along with the furnace. Theannealing method has the advantages that by changing the annealing atmosphere, the constant temperature and the constant-temperature yearly hour are improved, so that the laser output power of the Nd3+:YAG crystal is greatly improved; compared with similar types of existing products, the laser output power is improved by 10-15%.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of laser crystal annealing treatment, in particular to a method for increasing Nd 3+ : The annealing method of YAG crystal laser output power. Background technique

[0002] Nd grown by pulling method 3+ : YAG crystal due to Nd 2+ Oxygen vacancies due to the existence of oxygen vacancies, so it is often necessary to perform annealing treatment with oxygen supplementation, that is to say, it is usually necessary to add Nd 3+ : YAG crystals are annealed in the presence of oxygen. In the prior art, annealing under air atmosphere and annealing under pure oxygen atmosphere are generally used, because annealing under air atmosphere has two serious disadvantages: one is that the impurities mixed in the air easily cause secondary pollution to the crystal, and the other is that the annealing temperature is relatively high , the brightness and transmittance of the crystal are not ideal, and the annealing efficiency is not hi...

Examples

Embodiment 1

[0022] A way to increase Nd 3+ : the annealing method of YAG crystal laser output power, comprises the following steps:

[0023] Step 1. Put Φ3×67mmNd 3+ : YAG crystal rods are placed in a vacuum annealing furnace, and the vacuum annealing furnace is evacuated to -0.08MPa with a vacuum pump, wherein the Lu Qiang of the vacuum annealing furnace is a closed furnace cavity;

[0024] Step 2, open the inflation device, supply the mixed gas of nitrogen and oxygen to the vacuum annealing furnace through the vacuum tube, keep the vacuum in the vacuum annealing furnace at 0MPa, wherein the volume ratio of nitrogen and oxygen in the mixed gas is 1:1;

[0025] After step 3 and step 2 are completed, the temperature of the vacuum annealing furnace is raised to 1300°C, the heating rate is controlled at about 2.6°C / min, and the heating time is 480min;

[0026] Step 4. Keep the temperature of the vacuum annealing furnace at 1300°C. When the air pressure in the annealing furnace has a downwa...

Embodiment 2

[0031] A way to increase Nd 3+ : the annealing method of YAG crystal laser output power, comprises the following steps:

[0032] Step 1. Put Φ3×67mmNd 3+ : YAG crystal rods are placed in a vacuum annealing furnace, and the vacuum annealing furnace is evacuated to -0.08MPa with a vacuum pump, wherein the Lu Qiang of the vacuum annealing furnace is a closed furnace cavity;

[0033] Step 2, open the inflation device, supply the mixed gas of nitrogen and oxygen to the vacuum annealing furnace through the vacuum tube, keep the vacuum in the vacuum annealing furnace at 0MPa, wherein the volume ratio of nitrogen and oxygen in the mixed gas is 1:1;

[0034] After step 3 and step 2 are completed, the temperature of the vacuum annealing furnace is raised to 1250°C, the heating rate is controlled at 2.8°C / min, and the heating time is 445min;

[0035] Step 4. Keep the temperature of the vacuum annealing furnace at 1250°C. When the air pressure in the annealing furnace has a downward tre...

Embodiment 3

[0040] A way to increase Nd 3+ : the annealing method of YAG crystal laser output power, comprises the following steps:

[0041] Step 1. Put Φ3×67mmNd 3+ : YAG crystal rods are placed in a vacuum annealing furnace, and the vacuum annealing furnace is evacuated to -0.08MPa with a vacuum pump, wherein the Lu Qiang of the vacuum annealing furnace is a closed furnace cavity;

[0042] Step 2, open the inflation device, supply the mixed gas of nitrogen and oxygen to the vacuum annealing furnace through the vacuum tube, keep the vacuum in the vacuum annealing furnace at 0MPa, wherein the volume ratio of nitrogen and oxygen in the mixed gas is 1:1;

[0043] After step 3 and step 2 are completed, the temperature of the vacuum annealing furnace is raised to 1280°C, the heating rate is controlled at 2.5°C / min, and the heating time is 500min;

[0044] Step 4. Keep the temperature of the vacuum annealing furnace at 1280°C. When the air pressure in the annealing furnace has a downward tre...