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

LAN WDM Mux/Demux Module

SKU: FOT-WDM-LANWDM · LAN WDM / MWDM / FWDM · Fully passive

4 or 8 channel LWDM for 100G LR4 breakout. Built to your channel plan and swept channel by channel before it ships.

LWDM800 GHz grid
4 CHChannels
≤ 2.0 dBInsertion loss
0 WFully passive
Channels
4 CH — LAN-WDM L0–L38 CH — LWDM grid
Package
ABS boxLGX module1U rack
Connector
LC/UPCLC/APCSC/UPCSC/APC
Configured part numberFOT-WDM-LANWDM
Request a Quote Request Datasheet
Ships worldwide
Custom channel plans
3-year warranty

Product Overview

LAN WDM uses the tight 800 GHz-spaced grid around 1300 nm that 100G-LR4 and 400G-LR4/ER8 transceivers transmit on — L0 to L3 at 1295.56, 1300.05, 1304.58 and 1309.14 nm. A LAN WDM mux lets you break a four-lane LR4 module out into four independent single-wavelength links, or combine four 25G links onto one pair.

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
GridLAN-WDM L0–L3, 800 GHz spacing
Wavelength range1295.56 / 1300.05 / 1304.58 / 1309.14 nm
Channels4
Insertion Loss≤ 2.0 dB
Channel Isolation≥ 30 dB
Return Loss≥ 45 dB
PDL≤ 0.3 dB
Mechanical & Environment
PackageABS box, pigtailed
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-LANWDMStandard configuration4Build to order
FOT-WDM-LANWDM-8CHChannels: 8 CH — LWDM grid8Build to order
FOT-WDM-LANWDM-LGXPackage: LGX module4Build to order
FOT-WDM-LANWDM-1UPackage: 1U rack4Build 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

What is LAN WDM used for in practice?

Two things: breaking a 100G-LR4 or 400G-LR4 transceiver's four internal wavelengths out to four separate fibers, and building dense fronthaul where the 1300 nm window is preferred for its low dispersion.

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

MWDM Mux/Demux Module — 5G Fronthaul
LAN WDM / MWDM / FWDM

MWDM Mux/Demux Module — 5G Fronthaul

FWDM Filter — 1310 / 1550 nm Combiner
LAN WDM / MWDM / FWDM

FWDM Filter — 1310 / 1550 nm Combiner

CWDM Mux/Demux — 1U Rack Chassis
CWDM

CWDM Mux/Demux — 1U Rack Chassis

CWDM Mux/Demux — ABS Pigtailed Box
CWDM

CWDM Mux/Demux — ABS Pigtailed Box

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.