What is a bundle of optical Fibres called?

Bundle of Optical Fibers

A bundle of optical fibers, commonly referred to as an optical fiber bundle or fiber optic bundle, is a collection of individual optical fibers grouped together in a single unit. These bundles are used to transmit light signals over short or long distances, with applications ranging from telecommunications to medical imaging.

Composition and Structure

An optical fiber bundle is composed of numerous optical fibers, each of which is a thin strand of glass or plastic. Each fiber within the bundle is designed to carry light signals, utilizing the principle of total internal reflection to guide light along its length.

Types of Fiber Bundles

  • Coherent Fiber Bundles: These are precisely arranged so that the relative position of fibers at one end of the bundle is the same at the other end. Coherent bundles are essential for applications requiring image transmission, such as in endoscopes.
  • Incoherent Fiber Bundles: In these bundles, the fibers are randomly arranged. They are typically used for light transmission or illumination purposes rather than for image transmission.


Optical fiber bundles are utilized in a variety of fields, including:

  • Telecommunications, for the transmission of data over long distances with minimal loss.
  • Medical imaging, particularly in endoscopy, where coherent fiber bundles transmit images from inside the human body.
  • Industrial applications, such as in sensors and inspection devices.
  • Scientific research, for spectroscopy and other analytical techniques.

The versatility and efficiency of optical fiber bundles make them a crucial component in modern optical and communication technologies.

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