CWDM和DWDM之间的区别

1.粗波分复用器(CWDM)：
CWDM代表粗波分复用器。这些模块通过沿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，CWDM用于低成本，更宽范围的频率，更低的容量(低于10G)和距离较短的应用，在这些应用中，成本是一个重要因素。

2.密集波分复用器(DWDM)：
DWDM代表密集波分复用器。这些模块将来自不同来源的数据放到光纤电缆上。这些模块通过使用紧密间隔的波长在同一根电缆上承载多个信号来进一步提高系统带宽和容量。在DWDM系统中，与CWDM相比，多路复用通道的数量要密集得多，因为DWDM使用更窄的波长间隔将更多的通道安装到一条光纤上。

CWDM和DWDM之间的区别：

S.No.	CWDM	DWDM
1.	CWDM system having less than 8 active wavelengths per optical fiber.	DWDM system having more than 8 active wavelengths per optical fiber.
2.	It is defined by wavelengths.	It is defined by frequencies.
3.	It has lower capacity as compared.	It has higher capacity as compared.
4.	It has low cost.	It has high cost.
5.	It has short range communication distance.	It has long range communication distance.
6.	It uses wide range frequencies.	It uses narrow range frequencies.
7.	Its light signal is not amplified here.	Its light signal amplification can be used here.
8.	Its no. of active wavelengths per fiber fewer than 8.	Its no. of active wavelengths per fiber more than 8.
9.	It breaks the spectrum into big chunks.	It dices the spectrum into small pieces.
10.	It has more wavelength spacing.	It has less wavelength spacing as compared.