18 Channels Double Fiber Passive CWDM Mux/Demux: DCMD-18
18-Channel Double Fiber CCWDM Mux/Demux Overview
Our 18-channel double fiber CCWDM Mux/Demux delivers maximum wavelength capacity for dual-fiber metro and enterprise networks. Supporting ITU-T G.694.2 channels (1271-1611nm), this passive unit provides below 2.2 dB insertion loss with integrated monitor port. 19" 1U rack-mount form factor with LC/UPC connectors for high-density data center deployments.
- xWDM Technology: CWDM
- Package Type: 1U Rack Mount
- Number of Data Streams: 18
- Number of Optical Channels: 18
- Connector: LC/UPC
- Filter Technology: CCWDM (Compact CWDM – Free Space Technology)
- Insertation Loss (Passband): 2.2 dB
- Operating Temperature: 0 °C - 70 °C
- MTBF: 1000000 hours
DCMD-18 Mux/Demux Pricing
SKU:DCMD-18
Special Order - Up to 4 Weeks18 Channels Double Fiber Passive CWDM Mux/Demux Specification
Product Type | CWDM MUX/DEMUX Unit |
Package Type | 1U Rack Mount |
Number of Data Streams | 18 |
Number of Optical Channels | 18 |
Connector | LC/UPC |
Operating Wavelengths | 18 CWDM Channels 1271-1611nm |
Channel Spacing | 20 nm |
Passband | ± 6.5 nm (λ center) |
Filter Technology | CCWDM (Compact CWDM – Free Space Technology) |
Insertation Loss (Passband) | 2.2 dB |
Insertion Loss (1% Monitor Port) | 23 dB |
Monitoring Port Type | 1% Monitoring Port |
Isolation Adjacent Channels | 30 dB |
Isolation Non-Adjacent Channels | 40 dB |
Channel Pass-band Ripple | 0.3 dB |
Polarization Dependent Loss (PDL) | 0.2 dB |
Polarization Mode Dispersion (PMD) | 0.1 ps |
Directivity | 50 dB |
Return Loss | 45 dB |
Maximum Power Handling | 500 mW |
Operating Temperature | 0 °C - 70 °C |
Operating Humidity | 5 % - 95 % |
Storage Temperature | -40 °C - 85 °C |
MTBF | 1000000 hours |
Compliance | CE, ISO, ITU-T G.694.2, RoHS |
18 Channels Double Fiber Passive CWDM Mux/Demux Datasheet
v1Complete technical specifications and product details
18 Channels Double Fiber Passive CWDM Mux/Demux Description
18 Channels Double Fiber Passive CWDM mux/demux – DCMD-18 is a member of the EDGE Optics xWDM Series product line. We designed EDGE Optics xWDM Series products to allow easy, gradual, logical, and cost-efficient expansion of network bandwidth using industry-leading passive WDM technology. The main advantage of xWDM is its passive nature – no power supply or cooling necessary, robustness with no special micro-climate requirements, and as a passive element, it has an MTBF of 100+ years. xWDM is fully data rate and line protocol neutral – it is possible to use with colored transceivers supporting applications such as 1G/10G Ethernet, SDH/SONET, and 8/4/2/1G Fiber Channel. It is simple to install and requires no configuration or maintenance. DCMD-18 is a passive multiplexer/demultiplexer package based on Compact CWDM technology, designed to organize 18 duplex, protocol-independent ITU-T G.694.2 compatible Coarse Wavelength Division Multiplex (CWDM) data streams over a pair of single-mode optical fiber. The unit features LC/UPC connectors. With a focus on minimal insertion loss, DCMD-18 is equipped with band-pass or skip filters extending the maximum distance of CWDM connections. DCMD-18 is manufactured as 1 rack-unit high device fitting any standard equipment rack. The 1% monitor port ensures easy troubleshooting without downtime.
Frequently Asked Questions
Does the DCMD-18 require external power or cooling to operate?
The DCMD-18 is a passive optical filter, so it needs no external power or cooling to operate and has no micro-climate requirement for the rack space it occupies. There are no active parts to maintain, and it carries no configuration or ongoing service requirement. MTBF is rated at 1,000,000 hours.
Which wavelengths does the DCMD-18 cover, and how do I match transceivers to each channel?
The DCMD-18 filters 18 CWDM channels spanning 1271 to 1611 nm on 20 nm spacing, per ITU-T G.694.2. Each channel passband is +/-6.5 nm around its center wavelength, so a transceiver's actual output wavelength has to fall inside that window for the channel to pass it cleanly. Verify each transceiver's specified center wavelength against its datasheet or the platform's CWDM compatibility list before assigning it to a channel port.
How does the double fiber DCMD-18 differ from a single fiber CWDM mux/demux?
The DCMD-18 is a dual fiber (duplex) CWDM mux/demux: each channel uses a separate transmit and receive fiber path, the standard arrangement for duplex CWDM links. A single fiber CWDM mux/demux instead carries both directions on one fiber using paired wavelengths per channel. EDGE also offers single fiber CWDM units; confirm the specific unit's channel and wavelength plan from its datasheet before mixing double fiber and single fiber equipment on the same link.
How much insertion loss does the DCMD-18 add, and how should I plan the link budget around it?
The DCMD-18 has a passband insertion loss of 2.2 dB per unit. With a DCMD-18 at each end of the link, the two passive units contribute approximately 4.4 dB combined (2 x 2.2 dB) before fiber, connector, and splice losses are added. Adjacent channel isolation (30 dB) and non-adjacent channel isolation (40 dB) are separate crosstalk rejection specs, not insertion loss, so don't fold them into the loss budget. Check the transceiver and platform documentation for the full optical budget calculation.
How do I use the DCMD-18 monitor port to check channel power without breaking the link?
The monitor port taps approximately 1% of the optical signal, with 23 dB of insertion loss on that tap path, for connection to an optical power meter or other monitoring equipment. This is a test and monitoring output, not a traffic path, so it supports power level checks and fault isolation without breaking the live signal. Use it during commissioning or troubleshooting without disconnecting active fibers.