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A V-groove is a square, flat channel in the middle of a fiber optic cable that allows it to be split into two separate fibers. Splitting a cable into two allows for two completely separate circuits to be transmitted through the same physical cable. In this article, we will explain what V-grooves are, how they are used, and why they are important.

What is a V-groove?

A V-groove is simply a groove cut into one or both sides of the central strand in a fiber optic cable. One side of the central strand will contain multiple fibers (usually eight or twelve) while the other side of the strand has just one central fiber. The purpose of using V-grooves is to allow different optical signals to be transmitted over different strands in the same cable core, allowing each strand to act as its own independent channel.

V-grooves are used in fiber optic connectors for a variety of reasons. They can be used to hold an optical fiber in place to prevent it from being accidentally broken when the connector is removed or moved. The V-grooves may also be used to hold the optical fiber in place prior to fusion splicing or mechanical splicing. They may also function as alignment pins to ensure that the fibers are properly aligned with each other prior to fusion splicing or mechanical splicing.

Tapered V-grooves are generally used for alignment, while chamfered V-grooves are generally used to hold the optical fibers within the connector assembly. V-Grooves may be located on the outside edge of a connector ferrule or on the inside edge of a connector ferrule.

Optical fibers are held within V-groove connectors using a combination of tension and adhesive force. In many cases, the tension forces created by the splice closure housing and/or adapter will be sufficient to hold the optical fibers within the connector ferrule without the aid of adhesive. However, it is common practice to use epoxy adhesive within V-groove fiber optic connectors because it is inexpensive, easy to apply, and reliable.