CWDM

As a passive CWDM device, Coarse Wavelength Division Multiplexer (CWDM) is a low-cost WDM transmission technology for the metropolitan area network access layer. In principle, CWDM uses an optical multiplexer to multiplex optical signals of different wavelengths to a single optical fiber for transmission. At the receiving end of the link, the mixed signals in the optical fiber are decomposed into signals of different wavelengths with the help of an optical demultiplexer and connected to the corresponding receiving equipment.

CWDM adopts thin-film filter technology with good wavelength stability. It can be configured and upgraded according to requirements. The product has the characteristics of low insertion loss, high channel isolation, wide bandwidth, and low-temperature sensitivity.

It is generally divided into 4-channel, 8-Channel, 16 channel, or up to 18 channel coarse wavelength division multiplexers. Due to the requirement of low insertion loss of coarse wavelength division system, when there are many channels, the module can add jump chips to reduce the insertion loss of each channel.

CWDM solves the two problems of optical fiber shortage and multi-service transparent transmission. It is mainly used in metropolitan area network convergence and access layer and It has been widely used in man transmission and CATV systems. It can build a network and carry out services in a short time.

The common CWDM division packaging forms include ABS box, LGX Box, and 19 inch 1U chassis

Different Types of CWDM for Sale

1x2 Cwdm Single Device

Coarse Wavelength Optical Division Multiplexer

CWDM Mux/Demux in Lgx Box (4.8.16.18 CH)

Features of CWDM Equipment

Multiplexing of Up to 18 Channels on Fiber Pair

Comply with Itu-i G.695 Standard

It is a Flexible Plug-and-play Network Solution

CWDM vs DWDM: The Main Differences

Feature CWDM DWDM

Channel Spacing 20 nm 0.8 nm (100 GHz) or 0.4 nm (50 GHz)

Wavelength Range 1270 nm to 1610 nm 1525 nm to 1565 nm (C band), 1570 nm to 1610 nm (L band)

Number of Channels Up to 18 40, 80, or more

Transmission Distance Up to 160 km Up to thousands of km with amplification

Modulation Laser Uncooled laser Cooled laser

Bandwidth Max 400 Gbps Over 1 Tbps

Application Cable TV, FTTP, cost-effective data transmission Telecom, long-distance, high-bandwidth, data centers, DCI

CWDM is suited for shorter distances and has a wider channel spacing, making it a cost-effective solution for metropolitan and access networks.

DWDM offers higher channel density and is designed for long-distance, high-capacity transmission, but at a higher cost and complexity.

Advantages of CWDM Equipment

1

CWDM has the advantage of low equipment cost, improved optical fiber resources, flexibility, and scalability.

2

It has excellent optical performance indexes, such as low insertion loss, low polarization sensitivity, high return loss, high channel isolation, high stability, and high reliability, and does not affect the transmission quality of optical signals.

3

Passive products, it is no need to stay, simple maintenance, small volume, and easy installation.

4

It is seamlessly interconnected with repeaters, multiplexers, amplifiers and third-party WDM products to form a low-cost and cost-effective high-capacity CWDM customized solution.

Fiber Optic Solutions We Serve

PHX FIBER products are widely applied in fiber optical communication systems, fiber optic sensors, CATV, fiber lasers and other fiber optical instruments, etc.

As one of cwdm suppliers and cwdm manufacturers, we will do our best to meet all the needs of customers.

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