ABS box-type wavelength division multiplexer

An ABS box-type wavelength division multiplexer is a compact, hermetically packaged optical device that combines or separates multiple wavelengths on a single fiber, using thin-film filter technology for high stability and low insertion loss.

Overview

ABS box-type WDMs are optical modules designed to increase fiber capacity by multiplexing multiple optical signals onto a single fiber or demultiplexing them at the receiving end. They are available in both DWDM (Dense Wavelength Division Multiplexing) and CWDM (Coarse Wavelength Division Multiplexing) variants . The ABS box refers to the plastic enclosure that houses the optical components, providing mechanical protection, environmental stability, and ease of installation.

Technology

These devices typically use thin-film filter (TFF) technology, which allows precise separation of optical channels with low insertion loss and high channel isolation . DWDM ABS box modules often support 100 GHz channel spacing and multiple channels (e.g., 4, 8, 16), while CWDM modules can support up to 16 or 18 channels on a single fiber . The optical path is usually adhesive-free, and the packaging is designed to be hermetic, ensuring high environmental stability and reliability .

Features

• Low insertion loss and high isolation between channels
• Wide transmission passband for stable signal transmission
• Compact and lightweight ABS enclosure for easy deployment
• Adhesive-free optical path to reduce signal degradation
• Telcordia GR-1209/1221 compliance and RoHS certified
• Suitable for data center interconnects, metropolitan area networks, and enterprise networks

Applications

ABS box-type WDMs are widely used in:

• Fiber capacity expansion without laying additional fiber
• Mixed signal transmission, including SDH, ATM, Ethernet, and Fibre Channel
• Access and metro networks, supporting 10 Mb/s to 2.5 Gb/s rates
• Data center interconnects (DCI) and private enterprise networks

Advantages

• Cost-effective solution for increasing fiber utilization
• Compact form factor suitable for rack or wall mounting
• High reliability due to hermetic packaging and flux-free micro-optic design
• Flexible channel configurations for both DWDM and CWDM networks In summary, ABS box-type wavelength division multiplexers provide a robust, low-cost, and scalable solution for modern optical networks, enabling multiple wavelength channels to coexist on a single fiber while maintaining signal integrity and environmental stability .