Optical Fiber Technology, and How Does It Work


The current state of the optical fiber sensors shall be checked. The optical fiber sensors have many benefits, including tolerance to electromagnetic interference, light weight, compact scale, high sensitivity, wide bandwidth and ease of use for multiplexed or dispersed sensors. Strain, temperature and vibration are the most commonly studied parameters and the fiber grating sensor. This is the most commonly studied application for optical fiber sensors.

Fibre-optic gyroscopes and fiber-optic current sensors are clear examples of more advanced and commercialized optical fiber sensor technologies.

Within this article, innovations such as fiber-optic grating sensors, fiber-optic gyroscopes and fiber-optic current are among the numerous fiber-optic sensor technologies. Sensors are explored with an emphasis on standards and present situation. Many performances have been noticed today in the commercialization of optical fiber sensors. Nevertheless, they also suffer from competition in different fields with other advanced sensor technologies. Nevertheless, new technologies are constantly being formulated and tested not only for conventional dimensions but also for modern applications.

Optical Fiber Working and Its Applications

Communication using an optical fiber cable may be a technique of transmitting data from one  location to another by sending light pulses. These cables are currently used for communication, such as sending images, voice messages, etc. The construction of such cables should be made of plastic or glass so that data can be transferred easily faster than copper cables. What areCables also transformed the telecommunications market by playing a vital role in the delivery of data. Such cables replaced the copper cables.

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Today, the planet is linked to the Internet. Therefore, when using a light beam through a fiber optic cable, it is possible to make a phone call, video transfer and website search, etc.

What is Optical Fiber?

A cable used to relay data using fiber (threads) or plastic (glass) is known as an optical fiber cable. This cable contains a pack of glass threads that transmits modulated signals over light waves. There are other benefits when using these cables over certain types of communication cables, such as the speed of such cables is high, less fragile than metal cables. For interference, less heavy, lighter, and data can be transmitted digitally. The key drawbacks of these cables are that deployment is costly, more fragile and difficult to repair together. These cables are important to the LANs. The telecommunications providers are also replacing the telephone lines with such cables. One day, all communications should be made using fiber optics. The design considerations of these cables include, in, shaperobustness, longevity, tensile strength, flammability, thickness, temperature range and versatility.

Working of Optical Fiber

The fundamental theory of optical fiber is the transfer of information in the form of light atoms, or photons. The cores of the fiberglass & cladding have a special refractive index to bend inward light at a specific angle. If light signals are conveyed via an optical cable, they do not mirror the cladding & heart inside a series of zigzag bounces; This is called absolute internal reflection by sticking to a system.

The optical fiber is a thick, thin thread consisting of plain plastic. The shape of this cable is  identical to that of a bell. The heart of this cable is placed in the middle, and the outside of the heart is considered the cladding. The cladding here acts as a waterproof shield. These two are made of different types of plastic, other than glass. And the path of light in the heart will be very long, so it can be transferred to the cladding. If the light inside the heart meets the edge of the cladding in less than 90o angle, it bounces back. No light will fly fast until it gets to the end of the fiber, if not, the fiber will be painfully twisted or stretched. The cladding of the cable will be harmed until it is scratched. Therefore, a rubber surface like a barrier covers the paint. This buffered fiber can be put in a hard coat, which is considered to be a difficult one. It’s classified as the shirt. The fiber can then be used effectively without damaging it.

Types of Optical Fiber

The classification of optical fiber can be made on the basis of the materials used, the refractive index, and the mode of light propagation. The optical fiber cables are divided into two categories depending on the materials used, which contain the following.

1. Plastic fiber optic cables using polymethyl methacrylate can be used as a metal matrix for transmitted light. Glass fibers include very excellent glass fibers.

2. The optical fiber cables are categorized into two groups depending on the refractive index, which are as follows.

3. Stepindex fiber contains a heart that is surrounded by the cladding. It contains a single, uniform refraction map.

4. In gradedindex fibers, if the cable refractive index is the, the radial distance from  the fiber axis will be decreased.

5. The optical fiber cables are divided into two groups, depending on the light transmission mode, which are listed below.

6. Single-mode fibers are primarily used for the propagation of long-distance signals.

7. Multi – mode fibers are primarily used for transmitting signals over short distances.

8. The four variations of optical fibers can be generated by the refractive index as well as the mode of propagation, namely step-index single-mode, evaluated-index single-mode, step-index multimode and graded-index multimode.

Advantages and Disadvantages

The benefits of optical fiber include the following.

• The bandwidth is higher than the copper cable

• Lower power loss and data transfer over longer distances

• The optical cord is the barrier to electromagnetic interference

• The thickness of the fiber cable is 4.5 times the height of the copper wire and These cables are smaller, stronger and space-less than aluminum links.

The disadvantages of optical fiber include the following

• The optical fiber cables are very difficult to connect, so there would be a loss of the signal within the cable when scattering.

• The construction of these cables is cost effective. They ‘re not as strong as the tubes. Special test equipment is also needed for optical fiber.

• The fiber optic cables are lightweight and extremely fragile when installed

• These wires are more fragile than copper wires.

What are the Basic Elements of a Fiber Optic Communication System?

For gigabits and beyond data transfer gigabits, fibre optic networking is the optimal option. This method of networking is used for the transfer of audio, video, telemetry and data over long distances, local area networks or computer networks. The fiber optic transmission network uses light wave technologies to relay data over the fiber by transforming electronic signals into light. Some exceptional characteristic features of this type of communication Network such as wide bandwidth, smaller diameter, light weight, longdistance signal transmission, low attenuation, transmission reliability, and so on, make this connectivity a big building block of every telecommunications network. Subsequent material on the fiber optic transmission network outlines its strengths, basic features and other data.

How a Fiber Optic Communication Works?

Unlike copper wirebased communication, where communication relies solely on electrical signals flowing through the cable, fibre optic transmission requires transmitting of signals in the form of light from one location to the other. In fact, the fiber optic transmission network consists of transmitting and receiving equipment, light source and detection systems  such as those in the figure: [image: Working of Fiber optic communication]. Once input data is sent to the transmitter circuitry in the form of electrical signals, it is converted into a light signal with the aid of a light source. This source is Followed, the amplitude, frequency and phases of which must remain constant and free from fluctuations in order to  provide effective transmission. The light beam from the source is transported by a fiber optic cable to the destination. Circuits in which the information is transmitted back to the electrical  signal by the receiver circuit.

Working of Fiber optic communication

The transmitter module diagram of a photo detector and an effective electronic circuit capable of calculating the amplitude, frequency and phase of the optical field. This method of contact uses wavelengths near the infrared band that are only outside the visible spectrum. Both LED and Laser can be used as an application-based source of light.

3 Basic Elements of a Fiber Optic Communication System

There are three main basic elements of fiber optic:

1. Compact Light Source

2. Low loss Optical Fiber

3. Photo Detector

Accessories such as: cables, switches, couplings, multiplexing systems, amplifiers and splices are also main components of this communication network.

Photo Detectors

The purpose of the photo detectors is to transform the light signal back to the electrical signal.  Two types of photo detectors are primarily used for optical receivers in optical communication systems: PN photo diode and avalanche camera diode. Depending on the wavelength of the specification, the material composition of such instruments varies. Such materials include carbon, germanium, coal, etc.

It’s all about the basic elements of the fiber optic communication system. For additional information and some kind of assistance, please write to us as we welcome and appreciate your ideas, reviews, questions and comments. Please share your thoughts, feedback and opinions in the comments section below. Laser diodesBased on the implementations, such as local area networks and Long-haul communication networks, light source specifications differ. Source specifications involve power, speed, spectral line width, noise, robustness, expense, temperature, and so on. Two elements are used as light sources: LEDs and fiber lasers.

Low Loss Optical Fiber

Optical fiber is a cable that is also known as a low loss material cylindrical dielectric waveguide. Optical fiber also addresses factors such as the environment in which it works, tensile strength, longevity and rigidity. The fiber optic cable is made of high quality extruded (si) Or plastic, and it’s flexible. The fiber optic cable has a diameter of between 0.25 and 0.5 mm (slightly thicker than human hair).


Optical fiber processing has been used in many fields of telecommunications, photonics, medicine and electronics. Due to its performance, low loss, no interruption, higher bandwidth and relatively high data-carrying power, it attracted many researchers. While optical fibers have many benefits, there are also some drawbacks associated with optical fiber. Engineering. Some of the drawbacks of optical fibers are that, given the abundant availability of sand-based optical fiber fabrication materials, fibers are more costly than copper cables. The downside is that high-quality manpower is required for optical fiber mounting.


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Optical Fiber Technology, and How Does It Work. (2022, May 15). Retrieved from https://paperap.com/optical-fiber-technology-and-how-does-it-work/

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