These CWDM Mux/Demux/OADM modules are designed for building high‑capacity, flexible, and cost‑efficient optical links across metro, access, and enterprise networks. Based on the ITU CWDM grid from 1271 nm to 1611 nm (or 1270 nm to 1610 nm), they enable up to 18 independent wavelength channels to be transported over a single fiber pair. By multiplexing and demultiplexing multiple data streams, the modules significantly increase fiber utilization while maintaining low insertion loss and excellent signal integrity.

In modern CWDM transport systems, low optical loss and stable performance over temperature are critical. These modules feature insertion loss as low as 1.5 dB for 4‑channel configurations and up to 3.5 dB for higher‑density 16‑ and 18‑channel configurations, which is comparable to or better than typical CWDM devices used in telecom and data center environments. Tight channel uniformity and low passband ripple help ensure that each wavelength experiences similar performance, simplifying link budgeting and network planning.

The product line includes CWDM multiplexers, demultiplexers, and optical add/drop multiplexers (OADMs), all built with a modularized design philosophy. Mux and Demux units are used at the endpoints of a link to combine or separate multiple ITU‑grid wavelengths with 20 nm channel spacing, while OADM modules provide the capability to add or drop selected wavelengths at intermediate nodes without disturbing the other channels. This modular approach allows network engineers to deploy only the functionality required at each site and to scale capacity incrementally as demand grows.

Each module is engineered for robust field deployment. High isolation between adjacent and non‑adjacent channels (typically ≥30 dB and ≥40 dB respectively on the demultiplexer side) helps minimize crosstalk in dense wavelength environments. Excellent return loss and directivity further contribute to clean, reflection‑free links. With polarization dependent loss and polarization mode dispersion both maintained at very low levels, the modules support high‑bit‑rate transmission and are suitable for applications ranging from legacy SDH/SONET and Ethernet to modern high‑speed protocols transported over CWDM wavelengths.

A key strength of these CWDM modules is their ability to maintain stable optical characteristics across a wide operating temperature range. Available options include standard commercial (‑5 °C to +70 °C) and extended industrial (‑40 °C to +85 °C) temperature grades, making them suitable for controlled equipment rooms as well as harsher outdoor or street‑cabinet installations. Wavelength thermal stability is typically ≤0.002 nm/°C, and insertion loss thermal stability is ≤0.005 dB/°C, helping keep the channels accurately aligned with the ITU CWDM grid and ensuring consistent link performance over time.

The channel passband of ±6.5 nm or ±7.5 nm around each central wavelength gives sufficient tolerance for transceiver variations while maintaining strict separation between neighboring channels. Low passband ripple (≤0.4 dB) ensures that signal power remains flat across the usable portion of each channel, which is important for systems operating near their power budget limits. With power handling up to 300 mW or 500 mW, the modules can accommodate higher‑power transmitters and amplification schemes common in long‑reach or high‑density deployments.

To integrate smoothly into existing infrastructures, the CWDM Mux/Demux/OADM range is offered in multiple mechanical formats. Compact box‑type modules (such as 100 × 80 × 10 mm, 120 × 80 × 18 mm, and 140 × 115 × 18 mm) are well‑suited for inside‑chassis mounting, custom enclosures, or space‑constrained applications. LGX‑style plug‑in modules (1U and 2U variants) provide easy front‑access installation in distribution frames and patch panels, which is a common practice in telecom central offices and enterprise equipment rooms. For higher‑density or network‑edge environments, 19‑inch 1U rackmount units offer a neat, standardized footprint that fits seamlessly into typical data racks.

The modules utilize SMF‑28e compatible single‑mode fiber pigtails and support a variety of jacket types, including 900 µm loose tube, 2 mm, and 3 mm cables. Standard fiber lengths like 0.5 m and 1.0 m are available, and custom lengths can be specified to match panel layouts or cable management requirements. A broad selection of connector options—such as LC/PC, LC/APC, SC/PC, SC/APC, FC/PC, FC/APC, and ST—allows straightforward interfacing with existing optical distribution frames and patch cords.