Fibers

光纤_dB_衰减和测量介绍

This document is a quick reference to some of the formulas and important information related to optical technologies. It focuses on decibels (dB), decibels per milliwatt (dBm), attenuation and measurements, and provides an introduction to optical Fibers.

标签： dB 光纤衰减测量

上传时间： 2013-10-17

上传用户：libenshu01
Optical+Communication+Theory+and+Techniques

Since the advent of optical communications, a great technological effort has been devoted to the exploitation of the huge bandwidth of optical Fibers. Start- ing from a few Mb/s single channel systems, a fast and constant technological development has led to the actual 10 Gb/s per channel dense wavelength di- vision multiplexing (DWDM) systems, with dozens of channels on a single fiber. Transmitters and receivers are now ready for 40 Gb/s, whereas hundreds of channels can be simultaneously amplified by optical amplifiers.

标签： Communication Techniques Optical Theory and

上传时间： 2020-05-31

上传用户：shancjb
Wavelength Division Multiplexing

Wavelength division multiplexing (WDM) refers to a multiplexing and transmission scheme in optical telecommunications Fibers where different wavelengths, typically emitted by several lasers, are modulated independently (i.e., they carry independent information from the transmitters to the receivers). These wavelengths are then multiplexed in the transmitter by means of passive WDM filters, and likewise they are separated or demultiplexed in the receiver by means of the same filters or coherent detection that usually involves a tunable local oscillator (laser).

标签： Multiplexing Wavelength Division

上传时间： 2020-06-01

上传用户：shancjb