WDM和CWDM之间的区别

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，有助于使用多个光波长(或颜色)在同一介质上发送数据。在一根光纤上，两种或多种颜色的光可以传播，并且几个信号可以在光波导中以光谱上不同的波长或不同的频率传输。

2.粗波分复用器(CWDM)：
CWDM代表粗波分复用器。这些模块通过沿着光缆传输各种波长的多个信号来增加光纤系统将携带的带宽量。通常，它用于低成本，低容量，较宽的频率范围和较短的距离应用，在这些应用中，成本是一个重要因素。

WDM和CWDM之间的区别：

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.