18 Channels Double Fiber Passive CWDM Mux/Demux: DCMD-18
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DCMD-18-U
18-Channel Double Fiber CCWDM Mux/Demux Overview
The DCMD-18 is an 18-channel double-fiber passive CWDM multiplexer/demultiplexer built on Compact CWDM (CCWDM) free-space filter technology. It covers the complete ITU-T G.694.2 CWDM grid from 1271 to 1611nm across 18 channels at 20nm spacing, with no skipped channels. LC/UPC connectors and a 1U 19 inch rack-mount housing complete the fixed-configuration unit.
- 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: -5 °C - 70 °C
- MTBF: 1000000 hours
DCMD-18 Configurator & Pricing
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- Housing
- 19" 1U Type (-U)19" 1U Type (-U)
- Wavelength (CWDM)
- 1271-1611nm (-2761)1271-1611nm (-2761)
- Window Port
- NoNo
- EXP Expansion Port
- NoNo
DCMD-18 Mux/Demux Pricing
SKU:DCMD-18-UDCMD-18-U
Special Order - Up to 4 WeeksSpecial 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 |
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 | -5 °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 |
Insertion Loss (1% Monitor Port) | 23 dB |
18 Channels Double Fiber Passive CWDM Mux/Demux Datasheet
v5Complete technical specifications and product details
18 Channels Double Fiber Passive CWDM Mux/Demux Description
The DCMD-18 is an 18-channel double-fiber passive CWDM multiplexer/demultiplexer built on Compact CWDM (CCWDM) free-space filter technology. It organizes 18 duplex, protocol-independent CWDM data streams onto a pair of single-mode fibers, covering every ITU-T G.694.2 channel from 1271 to 1611nm at 20nm spacing with no skipped channels. LC/UPC connectors terminate each channel port. The unit ships in a 1U, 19 inch rack-mount housing, ready to install in a standard telecom or data center rack.
Passband insertion loss is 2.2 dB per channel. Channel isolation is 30 dB between adjacent channels and 40 dB between non-adjacent channels, with a channel passband ripple of 0.3 dB. Polarization dependent loss is 0.2 dB and polarization mode dispersion is 0.1 ps. Directivity is 50 dB and return loss is 45 dB. The unit is rated for a maximum power handling of 500 mW. Every DCMD-18 unit also includes a fixed 1% monitor port, tapping a small fraction of the line signal at 23 dB insertion loss for power monitoring without breaking the traffic path.
The DCMD-18 covers the complete 18-channel CWDM grid from 1271 to 1611nm, with every ITU-T G.694.2 channel present and none skipped. Operating temperature is -5 to 70 C at 5 to 95 percent relative humidity, with a storage temperature range of -40 to 85 C. MTBF is rated at 1,000,000 hours. The unit is CE and ISO compliant, meets ITU-T G.694.2, and is RoHS compliant.
The DCMD-18 is a special-order unit built to a fixed configuration, made to order rather than held in stock, so production lead time depends on current backlog. For lead-time confirmation, volume quotes, or configuration questions, contact our sales team.
Frequently Asked Questions
Does the DCMD-18 require external power or cooling to operate?
No. The DCMD-18 is a passive optical device with no active electronics, so it needs no external power or cooling. Its 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 covers all 18 ITU-T G.694.2 CWDM channels from 1271 to 1611nm at 20nm spacing, each with a passband of plus or minus 6.5 nm around its center wavelength. Match each port to a CWDM transceiver whose wavelength falls inside that passband, and verify the channel to port mapping on the unit before connecting transceivers.
How does the double fiber DCMD-18 differ from a single fiber CWDM mux/demux?
The DCMD-18 is a dual-fiber, duplex design: multiplexed and demultiplexed channels run on a pair of single-mode fibers rather than sharing one strand. EdgeOptic also carries single-fiber CWDM mux/demux units elsewhere in its catalog; confirm which fiber configuration matches the existing fiber plant before ordering, since dual-fiber and single-fiber units are not interchangeable on the same link.
How much insertion loss does the DCMD-18 add, and how should I plan the link budget around it?
Passband insertion loss is 2.2 dB per unit. A typical point to point link uses one DCMD-18 at each end, adding roughly 4.4 dB of combined insertion loss to the link budget before fiber, connector, and splice loss. The isolation figures, 30 dB adjacent channel and 40 dB non-adjacent channel, describe channel separation, not insertion loss, and should be tracked separately.
Does the DCMD-18 cover the complete CWDM wavelength grid, or does it skip any channels?
The DCMD-18 covers the complete 18-channel ITU-T G.694.2 CWDM grid from 1271 to 1611nm at 20nm spacing, with every channel present and none skipped.