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The emergence of fiber optics as an important technology for telecommunications has stimulated a growing interest in the study of propagation in optical waveguides. As the author points out in the Preface to this book, many of the previous theoretical treatments of this subject emphasize geometries of special significance for integrated optics, semiconductor lasers, or fiber optics, but do not provide a unified treatment of all of the important guided-wave structures. In this book, Adams presents in eight chapters and a consistent notation a comprehensive analysis of propagation in planar waveguides (five chapters), waveguides with rectangular cross sections (one chapter), and optical fibers (two chapters). The discussion of each geometry begins with a brief description of waveguides with conducting boundaries, and continues with extensive treatments of both step-index and graded-index dielectric waveguides.

To his credit, the author has used a common notation to facilitate comparisons of the various geometries. As an example, consider the familiar I/-parameter, which is usually defined in terms of the waveguide thickness in integrated optics and in terms of the radius of the core region in fiber optics. Adams defines Y for planar waveguides in terms of the layer’s half-thickness, so that it is more in keeping with the fiber optics definition. While this definition of V is at odds with the published literature, it will most likely prove helpful to those using the book to study the subject for the first time.

The author has chosen to limit his treatment to an exposition of the theory of perfect waveguides. This has been carried out from points of view based on both ray optics and Maxwell’s equations, with a good discussion of perturbation theory, the WKB approximation, and variational methods. A brief introduction to semiconductor lasers serves to motivate such topics as gain-induced guiding and multilayer waveguides. Because of the author’s decision to concentrate on perfect waveguides, the text does not explore areas such as far-field radiation, bending losses, mode-coupling in multimode fibers, evanescent coupling, and input-output coupling. Admittedly, the book would have needed expansion beyond its 396 pages to include such material, but a treatmenotf these additional topics within the context of the author’s unified notation would have been a welcome and worthwhile undertaking in the opinion of this reviewer.

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