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As a professional passive CWDM Mux/Demux manufacturer in China, FB-LINK offers a comprehensive range of coarse wavelength division multiplexing modules designed for metro network expansion and data center interconnection. Our product line features 4, 8, 16, and 18 channel configurations with thin film filter (TFF) technology, delivering superior optical performance across the full 1270-1610nm spectrum.
Each ITU-T G.694.2 compliant wavelength multiplexer in our portfolio ensures reliable interoperability with transceivers from any vendor. We provide factory-direct pricing with full customization capabilities for OEM and ODM partners worldwide.
Rugged enclosure protects optical components, supports rack or wall mounting installation.
Zero power consumption, no cooling required. MTBF exceeds 100 years for maintenance-free deployment.
≤1.6dB (4CH) to ≤4.5dB (18CH) maximizes optical power budget for extended reach.
Adjacent >30dB, Non-adjacent >40dB eliminates wavelength crosstalk interference.
All modules conform to international wavelength specifications with 20nm channel spacing. Center wavelength accuracy of ±0.5nm ensures compatibility with colored SFP, SFP+, and SFP28 transceivers across the 1270-1610nm range.
Our manufacturing process utilizes proprietary thin film coating and non-flux metal bonding micro-optics packaging. This delivers wide passband (>13nm @-0.5dB), low polarization dependent loss (<0.1dB), and excellent temperature stability (<0.005dB/°C) across operating temperatures from -40°C to +85°C.
The following table summarizes key optical parameters for our passive wavelength multiplexer modules:
| Parameter | 4 Channel | 8 Channel | 16 Channel | 18 Channel |
|---|---|---|---|---|
| Wavelength Range | 1270nm - 1610nm (ITU-T G.694.2) | |||
| Channel Spacing | 20nm | |||
| Center Wavelength Accuracy | ±0.5nm | |||
| Channel Passband (@-0.5dB) | >13nm | |||
| Insertion Loss (Max) | ≤1.6dB | ≤2.5dB | ≤4.5dB | ≤4.5dB |
| Channel Uniformity | ≤0.6dB | ≤1.0dB | ≤1.5dB | ≤1.5dB |
| Adjacent Channel Isolation | >30dB | |||
| Non-Adjacent Isolation | >40dB | |||
| Polarization Dependent Loss | <0.1dB | |||
| Return Loss | >45dB | |||
| Operating Temperature | -5°C to +75°C (Extended: -40°C to +85°C) | |||
| Package Dimension (ABS Box) | L100×W80×H10mm | L142×W102×H14.5mm | ||
The entry-level 4 channel CWDM Mux Demux provides cost-effective fiber capacity expansion for smaller metro networks and enterprise campus interconnections. With insertion loss ≤1.6dB and compact ABS packaging (L100×W80×H10mm), this configuration supports high-band (1470-1610nm) or low-band (1270-1330nm) wavelength plans.
Doubling the capacity while maintaining excellent optical performance with insertion loss ≤2.5dB. The 8 channel CWDM multiplexer is available in single fiber bidirectional and dual fiber configurations, ideal for metro ring networks, mobile backhaul aggregation, and enterprise WAN connections requiring protocol-transparent transport.
Maximizes fiber utilization by supporting 16 independent wavelengths over dual fiber infrastructure. With insertion loss ≤4.5dB and channel uniformity ≤1.5dB, this 16 channel high-density CWDM Mux Demux addresses demanding metropolitan network applications for ISPs and carriers.
Represents maximum coarse WDM capacity utilizing all available wavelengths from 1270nm to 1610nm. This 18 channel full-spectrum CWDM multiplexer demultiplexer serves large-scale metro deployments where fiber resources are severely constrained, delivering 18 independent services over a single fiber pair.
Modules ship with your choice of fiber optic connectors including LC/UPC, LC/APC, SC/UPC, SC/APC, FC/PC, FC/APC, and ST configurations. LC connectors remain popular for data center deployments due to high port density.
Configure specific wavelength combinations for your network architecture. Common configurations include high-band only (1470-1610nm), full-band, skip-band (avoiding 1390/1410nm), or custom designs with expansion ports. Our engineering team assists with wavelength planning for complex multi-site deployments.
Add a 1% or 2% tap coupler for non-intrusive optical power monitoring. This enables troubleshooting and performance verification without service interruption, supporting proactive network maintenance programs.
Telecommunications carriers deploy passive wavelength multiplexers to increase existing fiber capacity without new cable installation. A single fiber pair equipped with 8 or 16 channel modules supports multiple independent services including business Ethernet, mobile backhaul, and residential broadband.
Enterprise and cloud data centers utilize passive CWDM multiplexer for data center interconnect applications. Each wavelength carries an independent 10G, 25G, or 100G link, enabling aggregate capacities from 40Gbps to 1.8Tbps over metro distances without power requirements at intermediate sites.
Large corporate campuses implement 4 or 8 channel Mux Demux modules for enterprise campus connectivity, consolidating building-to-building links onto existing fiber infrastructure while supporting simultaneous data, voice, video, and storage replication traffic.
Mobile network operators embrace CWDM wavelength multiplexer for 5G fronthaul aggregation. An 8 channel module at the hub site combines traffic from multiple remote radio units, reducing fiber count between cell sites and baseband controllers as network densification accelerates.
All modules are completely protocol and rate transparent, supporting services from 1Gbps to 25Gbps per wavelength including Gigabit Ethernet, 10G/25G Ethernet, SDH/SONET, Fibre Channel, CPRI, and CATV RF overlay. Mix different services on the same system without configuration changes.
Every unit undergoes comprehensive optical testing before shipment, verifying insertion loss, channel isolation, return loss, and wavelength accuracy across the full operating temperature range. Manufacturing processes comply with ISO 9001 quality management standards, and all Telcordia GR-1221 compliant CWDM modules meet carrier network deployment requirements.
RoHS and REACH compliance ensures environmentally responsible materials throughout our product line. Detailed test reports accompany each shipment providing traceability and documentation with a standard 3-year warranty.
Q: What is the difference between coarse and dense wavelength division multiplexing?
A: Coarse WDM uses 20nm channel spacing with uncooled lasers, supporting up to 18 wavelengths over the 1270-1610nm range. Dense WDM employs much tighter spacing (typically 0.8nm) with temperature-stabilized lasers, enabling 40-96+ channels. The coarse approach offers lower cost and simpler operation for metro distances under 80km. FB-LINK manufactures both DWDM equipment and coarse WDM passive modules.
Q: Do these passive modules require electrical power?
A: No, these are completely unpowered optical devices using thin film filter technology to separate and combine wavelengths without electronic components. This passive Mux Demux zero power design means no heat generation and MTBF exceeding 100 years—ideal for unmanned remote sites where power availability is constrained.
Q: What transceivers are compatible?
A: Any colored SFP, SFP+, SFP28, or QSFP28 transceiver tuned to ITU-T G.694.2 wavelengths operates with our modules. FB-LINK supplies compatible optical transceivers including 1G, 10G, 25G, and 100G CWDM4 variants. Multi-vendor interoperability is guaranteed through standards-based wavelength specifications.
Q: Can channel count be expanded after initial deployment?
A: Yes, modular deployments allow incremental capacity growth. Start with 4 channels and add wavelengths as bandwidth demand increases. Our expandable CWDM Mux Demux with expansion port options enables cascading additional modules without disturbing existing traffic, aligning capital investment with revenue-generating services.
Q: What is the maximum transmission distance?
A: Distance depends on fiber attenuation, transceiver power budget, and wavelength selection. Typical deployments achieve 40-80km without amplification using 10G SFP+ transceivers. Longer wavelengths (1550-1610nm) experience lower attenuation (~0.25dB/km) enabling extended reach. Contact our engineering team for specific link budget calculations.
Q: What lead time and MOQ apply?
A: Standard configurations ship within 3-5 business days with no minimum order quantity for samples. Custom wavelength plans require 7-10 business days. We maintain buffer stock of popular 4CH and 8CH modules for rapid fulfillment. Contact us for wholesale pricing on larger deployment projects.
Q: Does FB-LINK provide OEM/ODM manufacturing?
A: Yes, we offer complete OEM and ODM services as a professional CWDM Mux Demux OEM ODM manufacturer. We produce modules to your specifications with custom branding, packaging, and documentation. Our engineering team supports custom wavelength configurations and unique enclosure designs for system integrators and telecom equipment vendors.
As a leading passive wavelength multiplexer manufacturer in China, FB-LINK Technology welcomes wholesale inquiries and OEM/ODM partnerships. Contact our sales team for competitive factory direct pricing on all channel configurations.
As one of the leading cwdm equipment manufacturers and suppliers in China, we warmly welcome you to wholesale or buy discount cwdm equipment in stock here from our factory. All customized products are with high quality and competitive price. Contact us for quotation and free sample.
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