光纤消耗是什么？若何计较？

[db:作者]

inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">在光纤安装中，对光纤链路停止正确的丈量和计较是考证收集完整性和确保收集性能很是重要的步调，光纤内会因光吸收和散射等形成明显的信号损失（即光纤消耗），从而影响光传输收集的牢靠性他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。那末光纤消耗若何计较的呢？
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.544px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; word-wrap: break-word !important;">portant; word-wrap: break-word !important; font-size: 17px;">光纤消耗的标准portant; word-wrap: break-word !important; font-size: 17px;">inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">电信产业同盟（TIA）和电子产业同盟（EIA）携手制定了EIA/TIA标准，该标准规定了光缆、毗连器的性能和传输要求，现在在光纤行业中被普遍接管和利用他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。EIA/TIA标准明白了最大衰减是光纤消耗丈量时最重要的参数之一他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。现实上，最大衰减是光缆的衰减系数，以dB/km为单元他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。下图显现了在EIA/TIA-568标准标准平分歧范例光缆的最大衰减他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。
portant;">portant;" class="firstRow">portant;">portant; word-wrap: break-word !important; font-size: 17px;">光缆范例portant;">portant; word-wrap: break-word !important; font-size: 17px;">波长（nm）portant;">portant; word-wrap: break-word !important; font-size: 17px;">最大衰减（dB / km）portant;">portant; word-wrap: break-word !important; font-size: 17px;">最小带宽（Mhz * km）portant;">portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">50/125μm多模portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">850portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">3.5portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">500portant;">portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">1300portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">1.5portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">500portant;">portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">62.5/125μm多模portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">850portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">3.5portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">160portant;">portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">1300portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">1.5portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">500portant;">portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">室内单模光缆portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">1310portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">1.0portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">——portant;">portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">1550portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">1.0portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">——portant;">portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">室外单模光缆portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">1310portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">0.5portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">——portant;">portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">1550portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">0.5portant; word-break: keep-all !important;">portant; word-wrap: break-word !important; font-size: 17px;">——inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.544px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; word-wrap: break-word !important;">portant; word-wrap: break-word !important; font-size: 17px;">若何计较光纤消耗？portant; word-wrap: break-word !important; font-size: 17px;">inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">若想检测光纤链路能否能一般运转，那末就需要计较光纤消耗、功率预算以及功率裕度，计较方式以下他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.544px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; word-wrap: break-word !important; font-size: 17px;">光纤消耗的计较inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">在光纤布线中，经常需要在一条肯定长度的线路上计较最大消耗他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。光纤消耗计较公式：
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">总链路消耗（LL）=光缆衰减+毗连器衰减+熔接衰减【注：假如还有其他组件（如衰减器），可将其衰减值叠加】

portant; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">光缆衰减（dB）=最大光纤衰减系数（dB / km）×长度（km）

portant; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">毗连器衰减（dB）=毗连器对数×毗连器消耗（dB）

portant; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">熔接衰减（dB）=熔接个数×熔接消耗（dB）
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">如上述公式所示，总链路消耗是一段光纤内最坏变量的最大总和他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。需要留意的是，以该种方式计较出的总链路消耗只是一种假定值，由于它假定了组件消耗的能够值，也就是说光纤现实的消耗取决于各类身分，消耗值能够会更高或更低他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">下面以现实案例为例演示若何计较光纤消耗他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。以下图，两栋修建之间安装了单模光纤，传输间隔为10km，波长为1310nm他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。同时，该光纤具有2个ST毗连器和1个熔讨论他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box !important; overflow-wrap: break-word !important;">

portant; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">光缆衰减——按照上述的标准表格，波长为1310nm的室外单模光缆的最大衰减值为0.5dB / km，是以光缆衰减值为0.5dB / km×10km=5dB他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。

portant; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">毗连器衰减——由于利用了2个ST毗连器，而每个ST毗连器的最大消耗为0.75dB，是以毗连器衰减为0.75dB×2=1.5dB他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。在现实计较中，毗连器的插损可参考供给商供给的规格值他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。

portant; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">熔接衰减——在TIA/EIA标准中标准了，熔接的最大消耗为0.3dB，是以熔接衰减为0.3dBx1=0.3dB他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">由此可得出，该光纤链路的总消耗为5dB+1.5dB+0.3dB=6.8dB他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.544px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; word-wrap: break-word !important;">portant; word-wrap: break-word !important; font-size: 17px;">功率预算的计较portant; word-wrap: break-word !important; font-size: 17px;">inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">上述说起的链路消耗值对全部链路的传输有何影响？这里就不能不得提到与之亲近相关的别的一个参数——功率预算他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。该参数值首要用于对照计较出的链路消耗值，以确保正确安装装备，只要当链路消耗值在功率预算之内时，链路才能一般运转他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。功率预算（PB）是接收器的灵敏度（PR）与发射器耦合进光纤的功率（PT）的差值，也就是说PB=PT-PR他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。假定发射器的均匀光功率为-15dBm，接收器的灵敏度为-28dBm，则功率预算为-15dB-（-28dB）= 13dB他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.544px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; word-wrap: break-word !important;">portant; word-wrap: break-word !important; font-size: 17px;">功率裕度的计较portant; word-wrap: break-word !important; font-size: 17px;">inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">计较完链路消耗和功率预算后，就需要计较功率裕度（PM），它是指从功率预算中撤除链路消耗以后的可勤奋率，即PM=PB-LL他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box !important; overflow-wrap: break-word !important;">

inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">一样以10km的室内单模光缆为例，由上述计较所得，它的功率预算为13dB，链路消耗为6.8dB，是以功率裕度为13dB-6.8dB=6.2dB他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。该计较所得值大于零，暗示链路还有充足的传输功率他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码。