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[资源] Introduction to laser technology（Third Edition）

PREFACE

HOW DOES A LASER WORK AND WHAT IS IT
GOOD FOR?
Answering this question is the goal of this textbook. Without delving into the
mathematical details of quantum electronics, we examine how lasers work as
well as how they can be modified for particular applications.
THE BOOK'S APPROACH
You should have some feeling for the overall organization of this textbook be-
fore you begin reading its chapters. The book begins with an introductory
chapter that explains in unsophisticated terms what a laser is and describes the
important applications of lasers worldwide.
Lasers produce light, and it's essential to understand how light works be-
fore you try to understand what a laser is. Chapters 2 through 5 are dedicated
to light and optics, with lasers rarely mentioned. The subjects discussed in
these chapters lead naturally to the laser principles in the following chapters,
and the laser chapters themselves won't make much sense without the optics
concepts presented in Chapters 2 through 5.
The heart of this text is contained in Chapters 6 through 9 because these
are the chapters that explicitly answer the question, How does a laser work?
As you read these chapters, you will find that two fundamental elements must
be present in any laser: some form of optical gain to produce the light, and
some form of feedback to control and amplify the light.
Having covered the fundamentals, the book turns to more sophisticated
topics in Chapters 10 through 19. Chapters 10 to 13 describe how a laser can
be modified for particular applications. Lasers can be pulsed to produce enor-
mously powerful outputs, or their beams can be limited to a very narrow
portion of the optical spectrum. And the color of the light produced by a laser can be altered through nonlinear optics.
Finally, the last six chapters of the book apply the principles developed in
the first 13 chapters to explain the operation and engineering of today's com-mercial lasers. All important lasers—gas lasers, optically-pumped solid-state lasers, and semiconductor lasers—are explicitly covered in these chapters.

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[ Last edited by zhq025 on 2008-1-16 at 11:01 ]

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