Fiber Optic Patch Cord:A Beginner’s Guide

Fiber optic patch cord is a length of optical cable that connects FTTH devices. It equips with fiber connectors such as LC, SC, FC, ST, E2000 etc., transmitting data signals between different optical fiber equipment.
fiber optic patch cord view
Table of Contents

Fiber optic patch cord is a length of optical cable that connects optical fiber equipment. It equips with fiber connectors such as LC, SC, FC, ST, E2000 etc., transmitting data signals between different optical fiber equipment.

As a key device in indoor environments, fiber optic patch cord widely use in data centers, network communications and computer networks.

Optical fiber patch cords offer several advantages, such as high reliability, adaptability, and security. You can choose connector types according to usage scenario, and adapt to different fiber optic equipment.

1.Fiber optic patch cord products view

Fiber optic patch cords mainly use to connect servers, switches, and routers. It consists of an optical fiber core with coverings like Kevlar, to prevent bending and pulling damage. As one of the top three patch cord suppliers in China, we would like to introduce some of the types we offer:

Fiber optic patch cord type

LC Type

The small form factor (SFF) connector on the LC fiber optic patch cable makes it perfect for high density applications. The LC fibre optic patch cord connector offers an optimal insertion and return loss and a zirconia ceramic ferrule measuring 1.25mm O.D. with a PC or APC endface.

SC Type

SC fiber optic patch cable is one of the earliest and most widely-use types of fiber optic cable. Many fiber optic networks use SC cause it is easy to use and economical. Zirconia sleeve and plastic housing are on a SC fiber patch cable.

ST Type

The ST fiber cable connector holds the fiber with a lengthy, spring-loaded ferrule and bayonet-style housing. Offering Both singlemode and multimode variants. Simplex and duplex adapters with horizontal mounting are in housing made of metal or plastic.

ST patch cord

FC Type

FC fiber optic patch cables have both singlemode and multimode versions, which completely interchangeable with NTT-FC goods. The FC fiber optic patch cord’s zirconia ceramic ferrule has a pre-polished PC profile and a convex spherical end on both the smf and mmf versions.

FC patch cord

When selecting a fiber optic patch cord manufacturer, factors to consider including :

  • Length
  • Connector type
  • Performance requirements for the application
  • Compatible with the connect devices

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If you have needs of patch cord, whether products or producing machines, be free to contact us!

2.Fiber optic patch cords test tips

Visual Inspection

The first step is to visually inspect the patch cord for any physical damage or dirt on the connectors. Use a fibre optic microscope to examine the connector endfaces to ensure there is no dirt or scratches.

Insertion Loss Test

Measure the patch cord’s insertion loss using an optical power metre and a source. Connect the patch cord to the source and the power metre, then measure the power receive at the other end. Rep the test by connecting the patch cord in the opposite direction.

Return Loss Test

Attach a reflectometer to the patch cord and measure how much light is reflect back from the connector.

3.Optical Transmission Mode of Patch Cord

Single-mode fiber optic patch cord

It can only transmit a mode of light, the central glass core is very thin, less diameter to make the reflection more closely, allowing only one mode of light transmission, so that the light signal spreads farther, more suitable for long-distance transmission, the light signal is also more stable.

Multimode fiber optic patch cord

It allows multiple modes of fiber transmission, due to the larger core size, dispersion, optical signal “diffusion” faster, because it is more suitable for short distance transmission, such as audio, video applications and local area networks part of the multimode fiber can support high-speed data transmission.

4.Patch Cable Ferrule Type

In order to make better contact between the end faces of two fibers, the core end face of a fiber optic patch cable is usually polished into different structures. The common polishing methods are PC, APC and UPC. PC/APC/UPC represents the front face structure of the ceramic insert.

PC uses microspherical polish, i.e. the surface of the insert is ground to a slight spherical surface and the fiber core is located at the highest point of the bend, effectively reducing the air gap between the light components and bringing the two fiber end surfaces into physical contact.

APC is known as beveled physical contact and the fiber end face is usually ground to an 8-degree angle bevel. 8-degree bevels allow for a tighter fiber end face that reflects light directly into the cladding, providing better connectivity.

UPC, Ultra-Physical Termination. UPC connectors are based on PC to optimise the surface finish of the end polishing box, having a slight curvature allows for a more precise docking.

Generally speaking, APC connectors are usually green and the other two are blue.

Patch Cable Ferrule Type

5.Optical Fiber Patch Cord Production Show

  1. Cutting cable: The first step is to cut the cable to the required length. The precision cable cutter is used to cut the cable without damaging the cable.
  2. Fiber stripping: Remove the outer sheath of the cable using a precision fiber stripping tool. This exposes the bare fibers.
  3. Clean the fiber: Clean the exposed fiber using a wool-free cloth and a special cleaning solution to remove any dust or dirt particles.
  4. Splice fibers: If the fiber optic patch cord need to be spliced, the fibers are aligned and fused together using a fusion machine. The splicer uses an electric arc to melt the ends of the fiber, creating a seamless connection.
  5. Mounting connectors: use epoxy adhesive or mechanical splicing to attach to the fibers. The connector is then polished to create a smooth finish.
  6. Test patch cord: After the connector was connected, the patch cord were tested to ensure that they met the required specifications. The test includes checking for insertion loss, return loss and visual inspection.
  7. Packing patch cord: The last step involves packing the patch cord and marking it with the necessary information such as length, connector type, and date of manufacture.

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