As we all know, WDM (Wavelength Division Multiplexing) is a technology that uses multiple lasers to send multiple lasers of different wavelengths on a single fiber at the same time. It can realize two-way communication on one fiber and increase network capacity. In a WDM system, a multiplexer is generally used at the transmitting end to multiplex several optical signals into a bundle of optical carrier signals for transmission on an optical fiber, and a demultiplexer is used at the receiving end to separate the signals. This article on FiberWDM Fiber will focus on CWDM and DWDM multiplexers/demultiplexers.

CWDM multiplexer/demultiplexer introduction

CWDM (Coarse Wavelength Division Multiplexing) technology is a good choice for increasing bandwidth capacity and reducing costs in short-range communication networks. The multiplexer in the CWDM coarse wavelength division multiplexing/demultiplexer is to multiplex multiple optical signals of different wavelengths onto one optical fiber for transmission; The signal is decomposed into the original multi-path optical wavelength signal.

DWDM multiplexer/demultiplexer introduction

DWDM (Dense Wavelength Division Multiplexing) solutions are the preferred solution for long distance transmission. It is specially designed for long-distance transmission of tight optical wavelengths in the C-band range, up to 48 wavelengths at 100GHz (0.8nm) and 96 wavelengths at 50GHz (0.4nm), fully compliant with ITU G.694.1, Telcordia GR1221 quality standard. The figure below shows the front panel of the 40-channel C21-C60 DWDM DWDM multiplexer & demultiplexer with monitoring port LC/UPC duplex, ideal for high density upload/download requirements in DWDM networks.

CWDM and DWDM wavelength division multiplexer/demultiplexer comparison

The biggest difference between the two is that the wavelength channel is different and the transmission distance is different. CWDM coarse wavelength division multiplexer/demultiplexer has large wavelength interval, less available wavelength channels, and shorter transmission distance than DWDM dense wavelength division multiplexer/demultiplexer. The wiring system used for operation is not complicated, and the deployment cost Low; DWDM wavelength division multiplexer/demultiplexer has small wavelength interval, many wavelength channels, long transmission distance, denser wiring system, and can carry a large amount of data, but its cost is higher, especially the application In situations where a lot of wiring is required.

As a professional manufacturer and supplier in the optical communication industry, FiberWDM  (Fiberwdm.com) fiber provides a full range of CWDM & DWDM multiplexers/demultiplexers. The multiplexers/demultiplexers we provide have lower loss and longer distances. For details, go to Check the official website.