This book is intended to be an introductory text for engineers and physicists who are likely to be involved in the area of optical fiber communications. Its purpose is to provide the student with an explanatory text that can al so be used for "self-study." Thus, key theoretical resul ts have been rather thoroughly derived, and detailed explanations have been given wherever cer- tain steps have been excluded. Some of the derivations are in new form, which the reader will hopefully find stimulating. In addition, some of the ex- perimental and theoretical results are based on the research of the...