DIFFERENCE BETWEEN INTERMODAL AND INTRAMODAL DISPERSION PDF

The types are intramodal and intermodal dispersion. Intramodal, or chromatic, dispersion occurs in all types of fibers. Intermodal, or modal, dispersion occurs only in multimode fibers. Each type of dispersion mechanism leads to pulse spreading. As a pulse spreads, energy is overlapped. This condition is shown in figure

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Login Now. Dispersion is the broadening of actual time-width of the pulse due to material properties and imperfections. As pulse travels down the fiber, dispersion causes pulse spreading.

This limits the distance travelled by the pulse and the bit rate of data on optical fiber. Pulse broadening within a single mode is called as intramodal dispersion or chromatic dispersion. Since this phenomenon is wavelength dependent and group velocity is a function of wavelength, it is also called as group velocity dispersion GVD.

The amount of waveguide dispersion depends on the structure of the fiber and can be varied by altering the parameters such as NA, core radius etc. Dispersion caused by multipath propagation of light energy is referred to as intermodal dispersion. Signal degradation occurs due to different values of group delay for each individual mode at a single frequency.

In digital transmission, we use light pulse to transmit bit 1 and no pulse for bit 0. When the light pulse enters fiber it is breakdown into small pulses carried by individual modes. At the output individual pulses are recombined and since they are overlapped receiver sees a long pulse causing pulse broadening. While explaining dispersion you mentioned there are three distinct types of distortions but only mentioned two??? Find answer to specific questions by searching them here.

It's the best way to discover useful content. Download our mobile app and study on-the-go. You'll get subjects, question papers, their solution, syllabus - All in one app. Login You must be logged in to read the answer. Go ahead and login, it'll take only a minute. Explain intermodal and intramodal dispersion in optical fibers.

How does dispersion affect the transmission B. Follow via messages Follow via email Do not follow. Please log in to add an answer. Continue reading Find answer to specific questions by searching them here. Find more. Engineering in your pocket Download our mobile app and study on-the-go.

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UNIT I Explain the intermodal and intramodal dispersion. What are

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Login Now. Dispersion is the broadening of actual time-width of the pulse due to material properties and imperfections. As pulse travels down the fiber, dispersion causes pulse spreading. This limits the distance travelled by the pulse and the bit rate of data on optical fiber. Pulse broadening within a single mode is called as intramodal dispersion or chromatic dispersion. Since this phenomenon is wavelength dependent and group velocity is a function of wavelength, it is also called as group velocity dispersion GVD. The amount of waveguide dispersion depends on the structure of the fiber and can be varied by altering the parameters such as NA, core radius etc.

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