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GB/T 37275-2018: Test method for lasing threshold and slope efficiency of Nd: YAG laser rods
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Test method for lasing threshold and slope efficiency of Nd: YAG laser rods
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GB/T 37275-2018
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Basic data | Standard ID | GB/T 37275-2018 (GB/T37275-2018) | | Description (Translated English) | Test method for lasing threshold and slope efficiency of Nd: YAG laser rods | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | L90 | | Classification of International Standard | 31.030 | | Word Count Estimation | 6,639 | | Date of Issue | 2018-12-28 | | Date of Implementation | 2019-07-01 | | Older Standard (superseded by this standard) | GB/T 11297.4-1989, GB/T 11297.5-1989 | | Regulation (derived from) | National Standard Announcement No. 17 of 2018 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 37275-2018: Test method for lasing threshold and slope efficiency of Nd: YAG laser rods---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Test method for lasing threshold and slope efficiency of Nd. YAG laser rods
ICS 31.030
L90
National Standards of People's Republic of China
Replace GB/T 11297.4-1989, GB/T 11297.5-1989
Laser threshold of yttrium-doped yttrium aluminum garnet laser rod
Slope efficiency measurement method
Published on.2018-12-28
2019-07-01 implementation
State market supervision and administration
China National Standardization Administration issued
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces the GB/T 11297.4-1989 "Measurement method for the long-pulse laser threshold and slope efficiency of erbium-doped yttrium aluminum garnet laser rods.
Method and GB/T 11297.5-1989 "Continuous Laser Threshold, Slope Efficiency and Output Power Measurement Method for Ytterbium-Doped Aluminum Garnet Laser Rods".
Compared with GB/T 11297.4-1989 and GB/T 11297.5-1989, the main technical contents except the editorial changes are as follows.
--- The scope of application has increased the measurement of glass and ceramic laser rods that can also be used for erbium-doped ions (see Chapter 1);
--- Increased the measurement environment, processing technical requirements and safety protection requirements of the laser rod under test (see 4.1, 4.2 and 4.3);
---Modified requirements for measuring devices and measuring conditions (see Chapter 6, GB/T 11297.4-1989, Chapter 3, GB/T 11297.5-
Chapter 3 of 1989);
---Modified measurement steps (see Chapter 7, GB/T 11297.4-1989, Chapter 4, GB/T 11297.5-1989
Chapter 5);
--- Increased measurement precision requirements (see Chapter 9).
This standard is under the jurisdiction of the Ministry of Industry and Information Technology (Electronics) of the People's Republic of China.
This standard was drafted. The 11th Research Institute of China Electronics Technology Group Corporation.
The main drafters of this standard. Zhu Jianhui, Qiu Yu.
The previous versions of the standards replaced by this standard are.
---GB/T 11297.4-1989;
---GB/T 11297.5-1989.
Laser threshold of yttrium-doped yttrium aluminum garnet laser rod
Slope efficiency measurement method
1 Scope
This standard specifies the measurement of yttrium-doped aluminum garnet (Nd.Y3Al5O12, abbreviated as Nd. in a standard laser cavity with a wavelength of 1.06 μm.
YAG) Method of continuous laser threshold, slope efficiency and output power of laser rods and methods of pulse energy, laser threshold and slope efficiency.
This standard is applicable to the measurement of Nd.YAG, and can also be used for erbium-doped glass and ceramic laser rods.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 1185 optical parts surface rickets
GB/T 11293-1989 Solid laser material terminology
3 Terms and definitions
The terms and definitions defined in GB/T 11293-1989 apply to this document.
4 requirements
4.1 Test conditions
Unless otherwise specified, testing shall be carried out under the following conditions.
a) Ambient temperature. 25 ° C ± 5 ° C;
b) Relative humidity. ≤ 85%;
c) The measurement system shall be in an environment free from significant vibrations, air currents and soot, and shall not interfere with the measurement results.
4.2 Technical requirements for processing laser rods to be tested
In addition to special requirements, the laser bar should meet the following requirements.
a) the parallelism of both ends should be better than or equal to 10";
b) the perpendicularity of the end face to the bar axis should be better than or equal to 5';
c) The surface of the end face should meet the requirements of GB/T 1185, the specific requirements are. B/0.8D0 × 0.05, C1 × 0.01, P0.1 (B is hemp
Point; D0 is the diameter of the laser rod, the unit is mm; C is the scratch; P is the collapse);
d) the end face flatness shall be better than or equal to λ/10 in the full diameter 90% diameter range (λ is 632.8 nm);
e) The antireflection film is coated on both ends of the laser crystal, and the residual reflectance at a wavelength of 1064 nm is not more than 0.2%.
4.3 Security
Safety protection requirements should meet the following requirements.
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