Optical fibers are widely used in fiber optic communications, which permits transmission over longer distances and at higher bandwidths data rates than other forms of communication. Signal distortion on optical fibers attenuation nptel. A basic fiber optic communication system must have at least three components. Pdf fiber optic systems are important telecommunication infrastructure for worldwide broadband networks. Recent years have seen an exponential increase in demand for large bandwidth and high data rate applications. Fiber optics, which is the science of light transmission through very fine glass or plastic fibers, continues to be used in more and more applications due to its inherent advantages over copper conductors.
Macrobending of an optical fiber is the attenuation associated with bending or wrapping the fiber. Fiber optic cables are the medium of choice in telecommunications infrastructure, enabling the transmission of highspeed voice, video, and data traffic in enterprise and service provider networks. Hello everyone, welcome to this course called fiber optic systems and. Fiber optic cable sounds like something out of a scifi film, and from all the talk, itd be easy to think that its just a marketing gimmick to upsell us on our internet packages. Optical fibers are recognized as the superior medium for delivering high bandwidth communications signals over long distances. So, we are all sharing the bandwidth which the optical fiber.
The fractional bandwidth of this transmission can be calculated as. The optical output from a laser diode is not constant at a particular level but has fluctuations in the light. An optical fiber is a thin, flexible, transparent fiber that acts as a waveguide, or light pipe, to transmit light between the two ends of the fiber. Optical fiber, its working principle, design, types, properties and applicability. The design criteria for a fiber optic link design procedure is mainly divided into. So, we call this system as a wavelength division multiplexed system. Nptel provides elearning through online web and video courses various streams. Fiber optic communication systems and techniques prof.
Optical communication provides an ultrahigh bandwidth for communication. The laser is turned on and off quickly by a driving circuit. The loss profile of an optical fiber with respect to frequency or wavelength is a very smooth. An overview of macrobending and microbending of optical. Fiber optics, which is the science of light transmission through very fine glass or plastic fibers, continues to be used in more and more applications due. Light can leak out of a fiber when the fiber is bent. The key attribute that enables this performance is very low attenuation, i. Therefore, we note that uniform amplitude response condition is well satisfied for the optical. This lecture explains about one of the application of optical properties of material, i.
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