2 Channels Single Fiber Passive DWDM Two side OADM Unit: SDAD-2
Panel preview
Schematic representation showing exact port count and wavelength configuration. Front panel updates as you configure.
SDAD-2-4144-31-M
2-Channel Single Fiber DWDM OADM Overview
This single fiber, two-sided DWDM Optical Add/Drop Multiplexer (OADM) adds and drops 2 ITU-T channel pairs (4 wavelengths) from a 100 GHz DWDM link. Ten selectable channel-pair groups span ITU-T C-band Ch21 to Ch60. Available in mini-LGX or LGX housing, with an optional 1310nm window port. LC/UPC connectors, fully passive design.
- xWDM Technology: BiDi DWDM
- Number of Data Streams: 2
- Number of Optical Channels: 4
- Connector: LC/UPC
- Filter Technology: TFF (Thin Film Filter)
- Insertation Loss (Passband): 1.8 dB
- Operating Temperature: 0 °C - 70 °C
- MTBF: 1000000 hours
SDAD-2 Configurator & Pricing
Configure your product below — the price, SKU and images update with every choice.
Review your configuration
- Housing
- mini-LGX Type (-M)mini-LGX Type (-M)
- Channel (DWDM)
- Ch.41-Ch.44 (-4144)Ch.41-Ch.44 (-4144)
- Window Port
- YesYes
- EXP Expansion Port
- NoNo
- Window Port Insertion Loss
- 1.0 dB1.0 dB
- Added Passband Insertion Loss
- +0.3 dB+0.3 dB
SDAD-2 DWDM OADM Pricing
SKU:SDAD-2-4144-31-MSDAD-2-4144-31-M
Special Order - Up to 4 WeeksSpecial Order - Up to 4 Weeks2 Channels Single Fiber Passive DWDM Two side OADM Unit Specification
Product Type | OADM Unit |
Number of Data Streams | 2 |
Number of Optical Channels | 4 |
Connector | LC/UPC |
Operating Wavelengths | 10 selectable 100 GHz DWDM channel-pair groups (2 pairs / 4 wavelengths per unit), spanning ITU-T C-band Ch 21 to Ch 60 |
Channel Spacing | 100 GHz (0.8 nm) |
Passband | >0.22 nm |
Filter Technology | TFF (Thin Film Filter) |
Insertation Loss (Passband) | 1.8 dB |
Isolation Adjacent Channels | 30 dB |
Isolation Non-Adjacent Channels | 40 dB |
Channel Pass-band Ripple | 0.5 dB |
Polarization Dependent Loss (PDL) | 0.1 dB |
Polarization Mode Dispersion (PMD) | 0.1 ps |
Uniformity | 1.0 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.694.1, RoHS |
2 Channels Single Fiber Passive DWDM Two side OADM Unit Datasheet
v6Complete technical specifications and product details
2 Channels Single Fiber Passive DWDM Two side OADM Unit Description
The SDAD-2 is a single fiber, two-sided DWDM Optical Add/Drop Multiplexer built for an intermediate node on a BiDi DWDM ring. At that node the unit adds and drops its assigned 2 ITU-T channel pairs (4 wavelengths) and passes every other channel through on the express path. Ten selectable channel-pair groups cover the ITU-T C-band from Ch21 to Ch60 on the 100 GHz DWDM grid (0.8nm spacing), so the same OADM design can be provisioned for different ring positions by selecting the appropriate channel group. Thin Film Filter (TFF) technology handles the wavelength separation, delivering 1.8dB insertion loss on the add/drop passband and 2.5dB on the express path, with 25dB adjacent channel isolation, 35dB non-adjacent isolation and 0.5dB passband ripple. Return loss runs to 45dB, PDL holds at 0.1dB, PMD at 0.1ps, and the unit handles up to 500mW of optical power.
Selecting the optional 1310nm window port raises those figures slightly, to about 2.1dB on the passband and 3.0dB on the express path, in exchange for a transparent tap that lets a technician check signal power without interrupting live traffic. As a fully passive component, the SDAD-2 needs no power supply and no cooling, and it operates from 0 to 70C (storage -40 to 85C, 5 to 95% humidity) with an MTBF of 1,000,000 hours. It ships in mini-LGX or standard LGX housing; both share the same LGX front-panel footprint, with mini-LGX cut to a shorter depth for tighter enclosures. Connectors are LC/UPC throughout. The channel grid follows ITU-T G.694.1, and the unit carries CE, ISO and RoHS compliance.
Frequently Asked Questions
What is the difference between an OADM and a mux/demux?
A mux/demux combines or splits the full set of DWDM wavelengths at the two endpoints of a link. An OADM sits at an intermediate point on the fiber and adds or drops only a subset of channels, in this case 2 channel pairs (4 wavelengths), while every other wavelength continues through on the express path. Choose a mux/demux for terminal equipment at each end of a link and an OADM like the SDAD-2 for a node partway along a DWDM ring or run that only needs to peel off a few channels locally.
What is the difference between a ROADM and this fixed OADM?
A ROADM uses a wavelength-selective switch so the add/drop channel assignment can be changed remotely without touching the fiber. The SDAD-2 is a fixed, fully passive OADM: the channel-pair group is set when the unit is ordered and stays fixed in service. That tradeoff removes any electronics, power requirement, or management interface from the unit, at the cost of not being able to reassign channels after deployment. Confirm the intended channel-pair group before ordering, since it cannot be changed later without swapping the unit.
Do I need the 1310nm window port option on my SDAD-2 order?
The 1310nm window port is an optional transparent optical tap that lets a technician check signal power on the line during testing or troubleshooting without interrupting live traffic. It does not carry payload data itself. Selecting it does add a small amount of insertion loss on both the add/drop and express paths, so choose it if the deployment needs an in-line test point and skip it if the link will rely on other monitoring methods.
What's the difference between the mini-LGX and LGX housing options?
Both housing options mount to the same LGX front-panel footprint used across the family. The mini-LGX version is a shorter-depth housing intended for space-constrained enclosures, while the standard LGX housing uses the full depth. Confirm the available depth in the target enclosure before choosing, since the two are not depth-interchangeable even though they share the same front-panel mounting.