9-Channel Single Fiber CWDM Mux/Demux (Side A): SCMD-9A
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SCMD-9A-M
9-Channel Single Fiber CWDM Mux/Demux, Side A
The SCMD-9A is a 9-channel single fiber CWDM mux/demux unit, the Side A half of an asymmetric single-fiber CWDM pair. It multiplexes and demultiplexes 9 CWDM channel pairs across 1271 to 1611nm on the ITU-T G.694.2 20nm grid through a single LC/UPC fiber, with 1.9dB passband insertion loss and a built-in 1% monitor port. Housing is configurable: mini-LGX, LGX, or 19 inch 1U rackmount, so the same optical core fits different mounting environments.
- xWDM Technology: BiDi CWDM
- Number of Data Streams: 9
- Number of Optical Channels: 18
- Connector: LC/UPC
- Filter Technology: CCWDM (Compact CWDM – Free Space Technology)
- Insertation Loss (Passband): 1.9 dB
- Operating Temperature: -5 °C - 70 °C
- MTBF: 1000000 hours
SCMD-9A Configurator & Pricing
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- Housing
- mini-LGX Type (-M)mini-LGX Type (-M)
- Wavelength (CWDM)
- 1271-1611nm (-2761)1271-1611nm (-2761)
- Window Port
- NoNo
- EXP Expansion Port
- NoNo
SCMD-9A Mux/Demux Pricing
SKU:SCMD-9A-MSCMD-9A-M
In Stock - Ships Next Business DayIn Stock - Ships Next Business Day9-Channel Single Fiber CWDM Mux/Demux (Side A) Specification
Product Type | BiDi CWDM MUX/DEMUX Unit |
Number of Data Streams | 9 |
Number of Optical Channels | 18 |
Connector | LC/UPC |
Operating Wavelengths | 9 CWDM Channel pairs 1271-1611nm |
Channel Spacing | 20 nm |
Passband | ± 6.5 nm (λ center) |
Filter Technology | CCWDM (Compact CWDM – Free Space Technology) |
Insertation Loss (Passband) | 1.9 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 | -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 Temperature | 0.005 dB/°C |
9-Channel Single Fiber CWDM Mux/Demux (Side A) Datasheet
v5Complete technical specifications and product details
9-Channel Single Fiber CWDM Mux/Demux (Side A) Description
The SCMD-9A is a passive CWDM multiplexer and demultiplexer for single-fiber CWDM links, carrying both directions on one strand instead of a fiber pair. This is the Side A unit of an asymmetric system; the counterpart SCMD-9B mounts at the far end. It combines nine channels onto, or splits them off, one LC/UPC fiber.
The SCMD-9A covers 9 CWDM channel pairs, 18 optical channels, across 1271 to 1611nm on the ITU-T G.694.2 20nm grid, with a passband of plus or minus 6.5nm. Passband insertion loss is 1.9dB, with isolation of 30dB adjacent and 40dB non-adjacent, via compact CWDM free-space filters.
A built-in 1% monitoring port is fixed on every SCMD-9A regardless of housing, for live optical power or OSNR checks without breaking the primary signal path. Insertion loss through the monitor port is 23dB.
Housing is selected at order time, not fixed to one form factor. Mini-LGX and LGX Types mount in standard LGX-compatible cassette shelves; the 19 inch 1U Type integrates directly onto rack rails. Wavelength plan and monitor port are identical across all three, affecting mounting only.
A working single-fiber CWDM link needs one SCMD-9A (Side A) and one SCMD-9B (Side B) at the far end. Each channel port carries one wavelength outbound and a different wavelength inbound; the SCMD-9B mirrors the pair with transmit and receive reversed. Two SCMD-9A units together will not link.
Operating temperature is -5 to 70C with an MTBF of 1,000,000 hours; the unit is CE, ISO, and RoHS compliant. For housing selection or project quantity orders, contact our sales team.
Frequently Asked Questions
Can the SCMD-9A operate on its own, or does the link need an SCMD-9B unit at the far end?
The SCMD-9A is one half of an asymmetric single-fiber CWDM pair, so a working link needs both an SCMD-9A (Side A) and an SCMD-9B (Side B), one at each end of the fiber. This is a standard single-fiber CWDM design constraint, not something specific to how the SCMD-9A is built. Running two SCMD-9A units on the same link, or leaving one end without an SCMD-9B, will not establish a working connection.
How do I use the SCMD-9A's built-in 1% window port, and is it included on every housing option?
The 1% window port is fixed on every SCMD-9A regardless of housing choice; it is not a configurable option. It taps roughly 1% of the optical signal so engineers can check live power levels or OSNR on the link without interrupting the primary signal path. Insertion loss through the window port is 23dB, consistent with the 1% split ratio.
Which wavelengths does the SCMD-9A carry, and how do the channels line up with the SCMD-9B at the other end?
The SCMD-9A covers 9 CWDM channel pairs across 1271 to 1611nm on the ITU-T G.694.2 20nm grid. Each duplex channel port on the SCMD-9A carries one wavelength outbound and a different wavelength inbound. The SCMD-9B mirrors the same channel pair with transmit and receive reversed, so the two wavelengths in each pair meet correctly at each end of the fiber.
Does the housing I choose for the SCMD-9A, mini-LGX, LGX, or 19 inch 1U, change its optical performance?
No. All three housings carry the same optical core, wavelength plan, and window port; the difference is mounting only. The mini-LGX and LGX Types are cassette form factors that mount in standard LGX-compatible shelves, at two different depth classes within that family. The 19 inch 1U Type integrates directly onto standard rack rails without a separate shelf. Choose the housing based on the mounting infrastructure already in the rack, not on optical performance.