Webera signal of 100 mw is injected into a fibre. The outcoming signal from the other end is 40 mw. Find the loss in db?
Answers
Answer:
Introduction
This document is a quick reference to some of the formulas and important information related to optical technologies. This document focuses on decibels (dB), decibels per milliwatt (dBm), attenuation and measurements, and provides an introduction to optical fibers.
Prerequisites
Requirements
There are no specific requirements for this document.
Components Used
This document is not restricted to specific software and hardware versions.
The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.
Conventions
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Answer:
power in =100
power out=40
loss in dB= -10log10(power out÷power in)
=-10log10(40÷100)
=3.979