BS EN 60793-1-41-2010 光学纤维.测量方法和试验规程.频带宽度

标准号：BS EN 60793-1-41-2010
中文标准名称：光学纤维.测量方法和试验规程.频带宽度
英文标准名称：Optical fibres. Measurement methods and test procedures. Bandwidth
标准类型：M33
发布日期：2010/11/30 12:00:00
实施日期：2010/11/30 12:00:00
中国标准分类号：M33
国际标准分类号：33.180.10
适用范围：This part of IEC 60793 describes three methods for determining and measuring the modalbandwidth of multimode optical fibres (see IEC 60793-2-10, IEC 60793-30 series andIEC 60793-40 series). The baseband frequency response is directly measured in thefrequency domain by determining the fibre response to a sinusoidaly modulated light source.The baseband response can also be measured by observing the broadening of a narrow pulseof light. The calculated response is determined using differential mode delay (DMD) data. Thethree methods are:? Method A – Time domain (pulse distortion) measurement? Method B – Frequency-domain measurement? Method C – Overfilled launch modal bandwidth calculated from differential mode delay(OMBc)Methods A and B can be performed using one of two launches: an overfilled launch (OFL)condition or a restricted mode launch (RML) condition. Method C is only defined for A1a.2(and A1a.3 in preparation) multimode fibre and uses a weighted summation of DMD launchresponses with the weights corresponding to an overfilled launch condition. The relevant testmethod and launch condition should be chosen according to the type of fibre.