Download An Introduction to Fiber Optics by Ajoy Ghatak PDF

By Ajoy Ghatak

ISBN-10: 0521577853

ISBN-13: 9780521577854

Contemporary advances within the improvement of low-loss optical fibers have revolutionized the sector of telecommunications, and fiber-based networks shape a key a part of overseas communications platforms. This publication introduces the actual rules of optical fibers, and info their use in sensor know-how and sleek optical verbal exchange platforms. The authors commence via taking off the elemental propagation features of unmarried mode and multimode optical fibers. In later chapters they disguise optical assets, optical detectors, and fiber-optic verbal exchange method layout. additionally they deal with a large choice of comparable themes equivalent to doped fiber amplifiers, dispersion reimbursement, fiber sensors, and dimension thoughts for the characterization of optical fibers. during the e-book, actual and engineering features of the topic are interwoven, and lots of labored examples and routines are integrated. it is going to be a fantastic textbook for undergraduate or graduate scholars taking classes in optical fiber communications, photonics, or optoelectronics.

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The stress can be compressive as well as tensile. • Dominant-normal stress in any orientation parallel to the wafer plane. Another important characteristic is the temperature. In order to investigate the temperature dependence of the piezoj unction effect, the temperature and stress should be controlled independently. In order to satisfy these requirements, a test structure was made. The test structure is based on the cantilever technique. 1 Cantilever technique The cantilever technique can be used to apply a well-controlled mechanical stress to the silicon beam, which contains the integrated devices and circuits.

The computer controls the stepper motor. An encoder position interface reads the angular position of the motor, closing the mechanical stress loop control. 6) were included in these calculations. Fig. 12 shows the silicon cantilever bending in detail. The test structure is used to investigate the mechanical-stress dependence of the base-emitter voltage of bipolar transistors. A stable temperature is necessary in order to avoid cross effects of the mechanical stress. The cross effects can be reduced by keeping the temperature of the DUTs constant during the mechanical-stress measurements.

These Hall sensors are relatively simple and can be produced cost-effectively by using 34 Piezo effects in silicon a standard integrated circuit process [30]. The most important parameter of the Hall plates is the current-related sensitivity to the magnetic field. The currentrelated sensitivity [31] is modified when a mechanical stress is applied [32]. The effect is similar to the piezoresistive effect in silicon. Recently, the piezoHall effect has been used as test vehicle of the instability of integrated sensors caused by thermo-mechanical stress in electronic packaging.

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