JJG 959-2001 光时域反射计

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中华人民共和国国家计量检定规程

JJG959-2001

光时域反射计

OpticalTimeDomainReflectometer

2001一02一01发布2001一05一01实施

国家质量技术监督局发布

JJG959-2001

光时域反射计(O下DR)

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TimeDomainReflectometer

本规程经国家质量技术监督局于2001年02月01日批准，并自2001

年05月01日起施行。

归口单位:全国几何量长度计量技术委员会

起草单位:中国计量科学研究院

本规程委托全国几何量长度计量技术委员会负责解释

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JJG959-2001

本规程主要起草人:

方毓文(中国计量科学研究院)

参加起草人:

李天初(中国计量科学研究院)

王民明(中国计量科学研究院)

李雪松(中国计量科学研究院)

张诚平(中国计量科学研究院)

JJG959-2001

目录

1范围····························································，·····························……(1)

2术语··························································································……(1)

3概述··························································································……(2)

4计量性能要求··············································································……(3)

4.1输出光中心波长······································································……(3)

4.2距离测量扩展不确定度·······························································……(3)

4.3损耗测量扩展不确定度·······························································……(3)

4.4位置偏差·················································································……(3)

4.5动态范围·················································································……(3)

4.6“衰减盲区”长度(3)

4.7“事件盲区”长度(3)

5通用技术要求··············································································……(3)

5.1标志·······················································································……(3)

5.2技术资料···························。·····················································……(3)

5.3外观·······················································································……(4)

5.4功能键····················································································……(4)

6计量器具控制···································································……‘’‘’‘’‘’.‘’(4)

6.1首次检定和后续检定·······················································……‘·‘.“““(4)

6.2检定条件·················································································……(4)

6.3检定项目和检定方法··················································……‘·‘”““““‘”(5)

6.4检定结果的处理·。··········································……”””””””””“’“’““(16)

6.5检定周期。(16)

附录A光时域反射计检定记录基本格式·············································……(17)

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JJG959-2001

光时域反射计检定规程

范围

本规程适用于光时域反射计(OTDR)的首次检定和后续检定。

2术语

2.1中心波长(x中心)

用nm表示的光源加权平均真空波长。

对连续光谱，中心波长定义为

(1)

对分离光谱

习P':l;

*中J。一}'Pi

(2)

式中:几—光源的谱功率密度;

A;—分立波长;

尸—波长为A，激光模的功率。

2.2参考距离(D,er)

借助于准确度比)〔TDR高的计量标准或测量仪器确定的光纤特征点之间的距离(m).

2.3距离标尺系数(SL)

OTDR平均显示距离除以相应的参考距离

(D.a,)

SL(3)

Drer

式中:D,,,,OTDR测量参考距离的显示平均值。

2.4参考位置(L-f)

借助于准确度比OTDR高的计量标准或测量仪器确定的OTDR前面板到光纤一个

特征点之间的距离(m)a

2.5位置偏差△Lo

OTDR测量参考位置特征点的显示值减去参考位置(m)(近似等于OTDR输出接

头在OTDR距离标尺的显示位置。对一个理想的OTDR，此项应为零)。

.TJG959-2001

AL,=L.1d:一(4)

式中:L,,,-OTDR测量参考位置的显示值。

2.6参考损耗(Ase,)

借助于不直接利用OTDR功率标尺的方法精确标定的一个光纤元件的损耗(dB)o

2.7损耗标尺系数(SA)

显示损耗与参考损耗之比(dB/dB)

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