WDM和CWDM的区别

在本文中，我们将讨论波分复用 (WDM) 和粗波分复用器 (CWDM) 之间的区别。让我们一一讨论。

1. 波分复用(WDM)：
WDM 代表波分复用。这是一种光纤传输技术，可促进使用多种光波长(或颜色)在同一介质上发送数据。在一根光纤上，可以传输两种或多种颜色的光，并且可以在光波导中以不同波长或光谱上的不同频率传输多种信号。

2. 粗波分复用器(CWDM)：
CWDM 代表粗波分复用器。这些模块通过沿光纤电缆传输不同波长的多个信号来增加光纤系统将承载的带宽量。通常，它用于低成本、低容量、更宽范围的频率和更短距离的应用，其中成本是一个重要因素。

WDM和CWDM的区别：

S.No.	WDM	CWDM
1.	WDM uses a number of light sources, each emits the light of different wavelengths.	CWDM systems having less than 8 active wavelengths per optical fiber.
2.	All the signals arrive at the same time, rather of being distributed across time slots.	It uses wide range frequencies.
3.	It improve the capability of optical cable in carrying data by multiplexing many channel of wavelengths.	Its components use less space on PCBs.
4.	The channel spacing is reduces to 1.6 nm or less.	The channel spacing is large from 1.6 nm to 25 nm.
5.	The band used are O and C.	The band used are O, E, S, L and C.
6.	It cost per channel is low.	It has low cost.
7.	The number of channels delivered are 2.	The number of channels delivered are 17 – 18.
8.	The best application is PON.	The best application is short haul, metro.