Advanced Optical Modulation Formats in High-speed Lightwave System by Sen Zhang Submitted to the Department of Electrical Engineering and Computer Science and the Faculty of the Graduate School of the University of Kansas in partial fulfillment of the requirements for the degree of Master of Science _________________________________ Professor in Charge _________________________________ _________________________________ Committee Members ________________________ Date thesis accepted
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light bulbs and LEDs. 3. Laser-(light amplification by stimulated emission of radiation) used to provide the high-powered‚ tightly controlled light wavelengths necessary for high-speed‚ long-distance optical fiber transmission. 4. Output Pattern-is the energy couples into the core of the optical fiber. 5. Output Power- allows transmission distances. 6. Modulation Speed- is something that can limit the performance of a fiber-optic communication system. 7. Core Diameter Mismatch- will cause confusion
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chemicals that make up the fiber must be deposited with precise control and symmetry to maintain consistent core/clad concentricity performance throughout the entire length of fiber. Fiber curl is the inherent curvature along a specific length of optical fiber that is exhibited
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A splice is a permanent connection of two optical fibers. Once the two optical fibers are joined with a splice‚ they cannot be taken apart and put back together as they can if you join them using connectors. A splice is typically employed for one of three reasons: to repair a damaged cable‚ to extend the length of a cable‚ or to join two different cable types. (Andrew Olivier‚ 2011‚ p. 617) There are some things that can affect splicing performance. There is Cladding Diameter which occurs when the
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mode optical fibers. This affects due to the length of the light that is emitted through wave lengths. The best way for one to avoid these affects is to make sure that the ratings match and the splicing is perfect along with the end faces meeting together. Next thing to discuss are the 3 factors for intrinsic performance. These factors are Numerical Aperture Mismatch‚ Core Diameter Mismatch‚ and Mode field Diameter Mismatch. A Numerical Aperture Mismatch can occur when the NA of one optical fiber
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of Fiber Optics An optical fiber is a thin and flexible fiber that carries the light between the two ends of the fiber. Optical fibers are widely used in Fiber Optic Communications‚ which is the transmission over longer distances at higher bandwidths than other communications. A fiber optic communication system consists of three components: an optical transmitter‚ a fiber optic cable‚ and an optical receiver. The optical transmitter converts electrical signal to optical signal; the fiber cable
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medium to a fast medium; such that a light ray will ___. a. bend towards the normal b. bend away from the normal c. equal the critical angle d. total internal reflection will occur 6. What is the wavelength an erbium-doped optical-fiber amplifier (EDFA) typically operates? a. 1490 nm b. 1550 nm c. 1310 nm d. 1625 nm 7. How many miles does 1 kilometer equal? a. 0.62 b. 6.2 c. 0.062 d. 62 8. What is the capacity supported
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satellite communication‚ modulation is necessary to transfer the information between satellite and the earth. Free-space optical (FSO) communications is a concept that has been around for many years. Today ’s market for space-based optical communications is primarily intersatellite links (ISLs). The usual parameters that system designers want to optimize drive the desire to utilize optical communications onboard a satellite: size‚ weight and power and of course‚ cost. FSO system uses a laser beam as a
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This is a false‚ in that the electronics have the same life as any of the other electronic components used in a network. The need for sharing components or modules is the same for fiber optics as for any other critical factory-level electronics. Optical fiber is used as glass or plastic‚ to contain and guide light wave. The fiber cable does not transmit electrical current‚ so it cannot cause ground loops. Therefore ground differentials caused by lightning-induced transients do not affect the communication
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MODERN TRENDS IN OPTICAL COMMUNICATION (FIBER OPTIC COMMUNICATION) CONTENTS ❖ Introduction ❖ Advantages of Fiber Optics ❖ Optical Transmitters ❖ The Optical Fiber ❖ Launching the Light ❖ Losses in Optical Fiber ❖ Optical Fiber Bandwidth ❖ Fiber Optic Cable Construction ❖ Other Types of Fibers ❖ Optical Receivers Introduction Our current "age of technology" is the result of many brilliant inventions and discoveries‚ but
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