K S. Murthy

Publication Date


Document Type


First Advisor

Pollack, Dale

Degree Name

M.S. (Master of Science)

Legacy Department

Department of Electrical Engineering


Optical wave guides; Integrated optics; Lithium niobate


Optical fiber is rapidly becoming the transmission media of choice for new telecommunication systems. To build a sophisticated optical transmission system, components to manipulate light such as optical switches, modulators and wavelength filters are required. To provide such compact, high-speed, low-drive power for both communication and signal-processing applications is the goal of a field referred to as integrated optical components (IOC's) . For fast and efficient control over light, these devices are made of an electro-optic material, wherein the refractive index of the device can be changed by an applied voltage. Light can be coupled into and out of the devices by attaching a f iber . Lithium Niobate, an IOC, is the most advanced for several reasons. First, high-quality Lithium Niobate substrate are commercially available; are strong, well-polished crystals; and have a very high electro-optic coefficient, which translates to low control voltages. Moreover, they also have a low optical transmission loss, which is especially important for many optical signal-processing applications. To conclude, theoretical studies were done using Lithium Niobate as one of the electro-optical materials in optical waveguides. The generation of optical pulses and detection of transient signals has been dealt with. The nonlinear pulse propagation in optical waveguides and the behavior of semiconductors/dielectric devices due to the nonlinear effects have also been investigated. Researchers at AT&T Bell Labs are currently interested in studying the third-order non-linear effects, and Lithium Tantalate electro-optic substrate material for integrated optical components and devices.


Includes bibliographical references (pages 148-149)


viii, 156 pages




Northern Illinois University

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