CWDM和DWDM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，CWDM 用于成本较低、频率范围更广、容量较低(低于 10G)和较短距离的应用，其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在一根光缆上。这些模块通过使用间隔很近的波长在同一条电缆上传输多个信号来进一步增加系统带宽和容量。在 DWDM 系统中，与 CWDM 相比，复用通道的数量要密集得多，因为 DWDM 使用更紧密的波长间隔来将更多通道安装到单根光纤上。

CWDM和DWDM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.