Imaging Systems

Download FTTX Concepts and Applications (Wiley Series in by Gerd Keiser PDF

By Gerd Keiser

ISBN-10: 0471704202

ISBN-13: 9780471704201

This ebook offers primary passive optical community (PON) strategies, supplying you with the instruments had to comprehend, layout, and construct those new entry networks. The logical series of subject matters starts with the underlying rules and elements of optical fiber conversation applied sciences utilized in entry networks. subsequent, the booklet progresses from descriptions of PON and fiber-to-the-X (FTTX) possible choices to their program to fiber-to-the-premises (FTTP) networks and, finally, to crucial size and trying out tactics for community deploy and maintenance.An Instructor's guide offering designated ideas to all of the difficulties within the booklet is obtainable from the Wiley editorial division.

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Additional info for FTTX Concepts and Applications (Wiley Series in Telecommunications and Signal Processing)

Sample text

Beyond the SBS threshold the percentage increase in signal depletion continues to grow until the SBS limit is reached. 19. Effect of SBS on signal power in an optical fiber. additional optical power launched into the fiber after this point merely is scattered backward along the fiber due to the SBS effect. 652 single-mode fiber has an SBS limit of 17 dBm. As an example of efforts to mitigate this limit, Corning Inc. 652-compatible fiber with a 3-dB-higher SBS threshold. This fiber enables an analog video signal with twice as much power (an additional 3 dB) to be launched into the fiber.

Upon entering a dielectric or nonconducting medium a lightwave slows down and now travels at a speed s, which is characteristic of the material and is less than c. 45 for silica glass. Note that if we have two different materials, the one with the larger value of n is said to be optically denser than the material with the lower value of n. For example, glass is optically denser than air. , a computer, telephone, or video device) at one location to corresponding equipment at another location with a high degree of reliability and accuracy.

5 μm) support many propagating rays or modes and are known as multimode fibers. The electromagnetic field patterns and the corresponding optical power distributions of the modes in an optical fiber are rather complex, and various simplified models have been developed to approximate them. However, one important characteristic of these modes is that their power distributions are not confined completely to the core, but instead, extend partially into the cladding. The fields vary harmonically within the core guiding region of index n1 and decay exponentially outside this region (in the cladding).

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