Optical Communication Products · Shenzhen, China
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Per-channel sweep reportDWDM OADM Add/Drop Module — FOT Fiber Optic
Configure the module below — the specification table updates live as you change channel count, package and connector.

DWDM OADM Add/Drop Module

SKU: FOT-WDM-DWDM-OADM · OADM Add/Drop · Fully passive

Drop 1–8 DWDM channels at an intermediate site. Built to your channel plan and swept channel by channel before it ships.

1 CHAdd / drop
≤ 1.2 dBExpress loss
100 GHzITU grid
0 WFully passive
Add / drop channels
1 channel2 channels4 channels8 channels
Direction
Single (east or west)Dual (east + west)
Package
LGX moduleABS box1U rack
Connector
LC/UPCLC/APCSC/UPCSC/APC
Configured part numberFOT-WDM-DWDM-OADM
Request a Quote Request Datasheet
Ships worldwide
Custom channel plans
3-year warranty

Product Overview

A DWDM optical add-drop multiplexer for ring and chain topologies. It extracts specific ITU channels at an intermediate node and passes the remaining wavelengths through with about a decibel of loss, so you can serve many sites from one fiber pair without terminating everything everywhere.

The optics are thin-film filter (TFF) based: dielectric filter stacks deposited on glass, aligned and epoxy-free bonded, then swept channel by channel before the unit is closed. There is nothing powered inside, so there is nothing to fail, no heat to remove and no software to patch — the module simply keeps working for the life of the plant.

Every unit is built to your channel plan and supplied with its measured sweep data: per-channel insertion loss, adjacent and non-adjacent isolation, return loss and PDL. Package, connector type, polish and pigtail length are all build options, and the filter platform is qualified to Telcordia GR-1221-CORE.

Technical SpecificationsUpdates with your selection

Optical
GridITU-T G.694.1, 100 GHz
Add/Drop Channels1
Express (pass-through) Loss≤ 1.2 dB
Add/Drop Loss≤ 1.5 dB
Isolation≥ 30 dB
Return Loss≥ 45 dB
PDL≤ 0.3 dB
Mechanical & Environment
PackageLGX plug-in cassette
DirectionSingle direction
ConnectorLC/UPC
Operating Temp-5 °C to +70 °C
ComplianceTelcordia GR-1209-CORE, RoHS
Testing, Quality & Supply
Optical Test100% — every channel swept for insertion loss, isolation and return loss
Test ReportPer-unit measured data supplied with the shipment
TraceabilitySerialized; serial links to the sweep record and production batch
Environmental QualificationTelcordia GR-1221-CORE reliability testing on the filter platform
CustomisationChannel plan, port count, package, connector and pigtail length built to order
Lead TimeStock configurations 3–5 days; custom channel plans 7–10 days
Warranty3 years

Ordering Information

Part NumberConfigurationChannelsAvailability
FOT-WDM-DWDM-OADMStandard configuration—Build to order
FOT-WDM-DWDM-OADM-AD2Add / drop channels: 2 channels—Build to order
FOT-WDM-DWDM-OADM-AD4Add / drop channels: 4 channels—Build to order
FOT-WDM-DWDM-OADM-AD8Add / drop channels: 8 channels—Build to order
FOT-WDM-DWDM-OADM-2DDirection: Dual (east + west)—Build to order

Part numbers are indicative. Send us the channel plan, package and connector and we confirm the exact build code on the quotation.

Quality & What's in the Box

Swept Channel by Channel

Insertion loss, isolation, return loss and PDL measured on every port of every unit.

Serialized & Traceable

Serial number links to the measured sweep record and the production batch.

Built to Your Plan

Channel list, port count, package, connector polish and pigtail length are all build options.

Packaging

Dust-capped and individually bagged with the test report, packed in export cartons.

Typical Applications

Metro & DCI

Multiply the capacity of leased or owned dark fibre without trenching a single extra strand.

Carrier Access & PON

Aggregate access rings and overlay new services onto fibre that is already lit.

5G Fronthaul & Backhaul

Colour the radio sites so one fibre pair serves a whole cluster of cells.

Enterprise & Campus

Join buildings, DR sites and storage replication over a single inter-site pair.

Frequently Asked Questions

How do I specify which channels to drop?

By ITU channel number or by wavelength — for example C34 / 1550.12 nm. The filters are built to that channel, so the order must state it. List every channel for multi-drop units.

What happens to the express channels?

They pass straight through the module without being demultiplexed, taking roughly 1.2 dB. That is the whole point of an OADM: the wavelengths that are not for this site are never touched.

Can you build a non-standard channel plan?

Yes — that is most of what we ship. Send the wavelength or ITU channel list, the port count, the package and the connector type on your RFQ and we build to it. Custom plans add only a few days to lead time.

How much loss should I budget for the passive layer?

Take the insertion loss shown for your channel count and double it, because you need a unit at each end of the link. Then add roughly 0.3 dB per mated connector pair and 0.1 dB per splice, and keep 3 dB of margin for ageing and future repairs before you compare against the transceiver's link budget.

Do you supply a measured test report?

Yes. Every unit is swept channel by channel and the measured insertion loss, isolation and return loss are supplied with the shipment. Sample reports can be provided in advance for tender documentation.

Related WDM Products

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Request a quote for this part

Tell us the platform and the quantity. An engineer checks the part against your switch and software version before quoting — if it will not work, we say so.

Goes to our engineers and the quotation desk together. Replies come from sales@topnetsystem.com, usually within one working day.