Shenzhen Puhuixin Tecnhnology Co., Ltd.


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

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Features of CWDM Equipment

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

Advantages of CWDM Equipment

CWDM has the advantage of low equipment cost, improved optical fiber resources, flexibility, and scalability.
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.
Passive products, it is no need to stay, simple maintenance, small volume, and easy installation.
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.
Optical sensing is the key technology of self-driving because a self-driving car relies on a sensor system to perceive and navigate its surrounding environment accurately to ensure safety.
Optical technology in Autonomous Vehicles
Application of fiber optic passive components enable the engineering implementation of full fiber network to realize, and improve the performance of optical communication system.
Optical Fiber Used in Optical Communication System
Passive Optical LAN is of higher Efficiency, Security and energy conservation, but lower cost.
Optical Fiber Used In Local Area Networks
Connection, distribution, isolation and filtration of optical fiber passive components play important parts in CATV system.
Optical Fiber Used In CATV Systems
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