LC-LC Duplex Single Mode Patch Cord

Why the LC-LC duplex single mode patch cord matters in a high-density rack

In a data center or a patch panel, the LC-LC duplex single mode patch cord is the physical link that carries a signal between two LC ports. When racks are dense and every U of space is occupied, the connector size and the way the two fibers are paired decide how cleanly the cabling fits and how easy it is to trace a circuit later. This cord uses the compact LC interface on both ends and pairs two fibers in a single duplex jacket, so a full duplex link is one assembly rather than two loose fibers.

The fiber is single mode G.652D, the standard fiber type used for long-reach and high-bandwidth links in telecom and enterprise networks. Because the core is small and carries one mode, single mode patch cords are the usual choice when the link must run farther than multimode can reach or when the transceiver expects single mode fiber.

What the insertion loss and return loss figures tell you

The specs list insertion loss at or below 0.3 dB and return loss at or above 50 dB for the UPC polish. Insertion loss is the signal lost as light passes through the connection; a lower number means less of the transmitted power is wasted at the joint. Return loss is the amount of light reflected back toward the source; a higher number means the end face is polished cleanly enough that reflections stay low. For a single mode link, keeping reflections low matters because reflected light can interfere with the transmitter and degrade the signal.

These figures are the values the cord is specified to meet, and each cord is individually tested for insertion loss and continuity before dispatch. If your link budget is tight or your application is sensitive to reflections, the UPC polish on this cord is the relevant detail to compare against your requirement.

Choosing the right length and jacket for your route

The cord is available from 0.5 m to 50 m, with custom lengths on request. Measure the actual path between the two LC ports, including the slack you need for cable management and future re-termination, before you order. Ordering a length that is too short forces a re-run; ordering one that is far too long leaves excess coil that takes up space in the rack.

Two jacket options are offered. LSZH (low smoke zero halogen) is the choice for enclosed or poorly ventilated spaces such as inside racks and raised floors, because it produces less smoke and fewer corrosive gases if it burns. PVC is a general-purpose jacket for ordinary indoor runs where low-smoke performance is not required. Match the jacket to the environment your local code or your own policy requires.

How this cord fits a data center or patch panel build

In a patch panel, the duplex LC cord connects the panel port to the active equipment or to the next panel. In a data center, it is the last few meters between the switch port and the patch panel, or between two pieces of equipment. Because both ends are LC, the cord is a straight point-to-point link; if your two ends use different connector types, a hybrid cord is the alternative.

The duplex design keeps the transmit and receive fibers together, which makes the link easier to identify and less likely to be crossed during installation. For high-density racks, keeping the cords organized and labeled at both ends is what makes later moves, adds and changes manageable.

OEM and ODM support

Nexora supports OEM and ODM projects for this patch cord. Custom lengths, jacket colors and packaging can be arranged to match your project. If you are integrating this cord into a larger product or a branded solution, tell us the length, jacket and labeling you need so we can confirm the configuration against your requirement before quoting.

Installation and care notes

Handle the cord by the connector body and the jacket, not by the fiber. Keep the bend radius within what the cable is designed for, and avoid sharp kinks at the connector boot. When a connector is not in use, keep the dust cap on to protect the polished end face. Clean the end faces with the proper fiber cleaning tools before mating, because a dirty end face is a common cause of high insertion loss and intermittent links.

Frequently asked questions

Is this cord single mode or multimode?

This is a single mode cord using G.652D fiber. If your link needs multimode, a separate multimode patch cord is the matching product.

Can I get a custom length?

Yes. The standard range is 0.5 m to 50 m, and custom lengths can be arranged. Confirm the exact length you need when you request a quote.

What is the difference between LSZH and PVC?

LSZH produces less smoke and fewer corrosive gases in a fire, so it is preferred in enclosed or poorly ventilated spaces. PVC is a general-purpose indoor jacket where low-smoke performance is not required.

Is the cord tested before dispatch?

Each cord is individually tested for insertion loss and continuity before dispatch.

Request product details

Tell us the length, jacket type and quantity you need, and whether you require a custom configuration. We will confirm the specification and lead time against your project before quoting.

Request a quote for this LC-LC patch cord