Optical Communication Products · Shenzhen, China
Tel: +86 0755 23766314  ·  marketing@fotfiberoptic.com
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100% Factory TestedIn-Line Variable Optical Attenuator — FOT Fiber Optic
👆 Click the options to preview each version — your selection is included in the quote email.

In-Line Variable Optical Attenuator

SKU: FOT-ATT-VOA-IL · Category: PLC Splitters & Accessories

Pigtailed screw-tune VOA spliced into the link, 0–30 dB. Factory-terminated and 100% tested before shipment.

0–30 dBScrew-Tune Range
PigtailedSplice or Plug In
4 VersionsLC/SC/FC · UPC/APC
≥ 50 dBReturn Loss
Interface
LC/UPCSC/UPCSC/APCFC/UPC
Fiber
G.652D 0.9/2.0/3.0 mm
Request a Quote Request Datasheet
Ships worldwide
OEM / ODM welcome
3-year warranty

Product Overview

The in-line VOA puts a precision tuning block directly on a terminated fiber jumper: turn the screw to set any attenuation from near-zero to 30 dB, then lock it. Because both ends are standard connectors, it drops into a link like an ordinary patch cord — no adapters, no extra loss points.

Ideal for receiver-power balancing in EDFA and DWDM links, lab characterization and burn-in racks. Click an interface option above the quote button to preview each version — LC/UPC, SC/UPC, SC/APC and FC/UPC are stocked; other connectors and lengths on request.

Technical Specifications

Optical
Range0 – 30 dB continuous
Return Loss≥ 50 dB (UPC) / ≥ 60 dB (APC)
Wavelength1310 / 1550 nm
Power≤ 500 mW
Package
StylePigtailed in-line block
InterfacesLC/SC/FC, UPC & APC
Cable0.9 / 2.0 / 3.0 mm, any length
Temp−40 ~ +80 °C

Typical Applications

Data Centers

High-density interconnect & spine-leaf

Cloud & AI Clusters

GPU fabrics and storage networks

Telecom & FTTx

Carrier transport and access

Enterprise

Campus backbone and SAN

Frequently Asked Questions

How is this different from the screw-type VOA adapter?

The adapter version sits between two patch cords; the in-line version IS the patch cord with the attenuator built mid-span — fewer mating points, lower total loss, and it can be ordered at any cable length.

Are the patch cords tested before shipment?

Every assembly undergoes 100% optical inspection plus insertion- and return-loss testing to IEC, TIA/EIA and Telcordia standards. Test reports are available on request.

Can length, color, jacket and connectors be customized?

Yes — length, jacket color and material (PVC / LSZH / OFNP / OFNR), cable diameter (0.9 / 2.0 / 3.0 mm) and any connector combination are OEM/ODM customizable.

What are your MOQ and lead time?

Standard configurations ship in 3–7 days with flexible MOQ. Custom OEM/ODM runs are quoted per project — send us your specs for a fast quotation.

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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.