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SJ 20821-2002Measurements method for coefficient of loss per pass of laser rods (English PDF)

激光棒单程损耗系数的测量方法

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Issued by

Ministry of Industry and Information Technology

Level / Type

National · Mandatory

Issue date

November 1, 2002

Implementation date

March 1, 2003

Scope

SJ 20821-2002 is the English-translated version of 激光棒单程损耗系数的测量方法.

SJ 20821-2002 is the Chinese standard "Measurements method for coefficient of loss per pass of laser rods". This standard specifies the way the laser rod loss coefficient measurement method.

This standard applies to 1064mm wavelength of the light wave energy through the laser rod. Issued on 2002-11-01, in force from 2003-03-01.

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Document preview — SJ 20821-2002

National Standard of the People's Republic of China

Classification: L51

[Preview only]
1 Scope
2 Normative References
2.1 Terms
3 Terms and Definitions
4 Overview
4.1 General requirements
5 Technical Requirements
6 Calibration conditions
6.1 Environmental conditions
6.2 Measurement standards and other equipment
7 Calibration items and calibration methods
7.1 Calibration Items
7.2 Calibration method
8 Expression of calibration results
9 Recalibration interval

1 Foreword

SJ 20821-2002 was issued by Ministry of Industry and Information Technology on 1 November 2002 and has been in force since 1 March 2003.

The SJ prefix, without a suffix, marks a mandatory standard: within its scope, compliance is required.

The document runs to 8 pages in English translation.

2 Scope Preview

This standard specifies the way the laser rod loss coefficient measurement method. This standard applies to 1064mm wavelength of the light wave energy through the laser rod.

SJ 20821-2002 is filed under Chinese Standard Classification L51, in the field of electronic components and information technology.

This catalogue holds 1,191 other SJ standards without an ICS number.

In this catalogue, SJ standards carry edition years from 1965 to 2021.

3 About this standard

Sector: Electronics Industry Standard

Issued by: Ministry of Industry and Information Technology

English translation: about 8 pages (approximate)

Chinese original: about 5,566 characters

4 Related standards

Standards on related subjects:

GB/T 30117.1-2024 — Photobiological safety of non-coherent light products - Part 1: General requirements

GB/T 18490.1-2017 — Safety of machinery -- Laser processing machines -- Part 1: General safety requirement

JB/T 12632-2016 — Fibre lasers

SJ 21586-2021 — Additive Manufacturing Process Requirements for Selected Area Laser Melting of Aluminum Alloys for Military Electronic Equipment

SJ/T 11403-2009 — Laser diode modules used for telecommunication. Reliability assessment

5 Classification and status

Chinese Standard Classification (CCS): L 51

Prefix SJ: mandatory standard.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 8 pages — is available in the English PDF.

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