Optoacoustic Spectroscopy and Detection

Optoacoustic Spectroscopy and Detection discusses the fundamental principles and practice of optoacoustic spectroscopy. This book serves as a basis for evaluation of the feasibility of using such techniques in specific instances.
Organized into eight chapters, this book starts with an overview of the detection and identification of gas contaminants, which is necessary to understand the physical description of the generation and measurement of the optoacoustic signal. This text then provides an understanding of the optoacoustic effect on a molecular scale and describes the energy transfer processes and estimates of the lifetimes of vibrationally excited states. Other chapters consider the options available to the researcher in the selection of optoacoustic system design. This book discusses as well the capabilities and limitations of various optoacoustic system designs. The final chapter deals with the technique used for exploring the absorption spectra of substances, including powders, gels, adsorbed films, and organic tissues.
This book is a valuable resource for researchers and graduate students engaged in the study of optoacoustic spectroscopy.

Contenu

List of Contributors

Preface

1The Physics of Signal Generation and Detection

I. Introduction

II. Absorption of Light

III. Excitation of Sound

IV. Signal Detection

V. Optimum Design of an Optoacoustic System

VI. Numerical Example

References

2 Energy Transfer Mechanisms

I. Introduction

II. Rate Equation Description

III. Energy Transfer Processes

IV. Conclusion

References

3 Design of Optoacoustic Systems

I. Introduction

II. Sample Chamber Design

III. Wavelength and Amplitude Modulation of the Excitation Source

IV. Comparison with Other Analytic Techniques

References

4 Tunable Radiation Sources in the Ultraviolet and Visible Spectral Regions ( 0.1-1.0 µm)

I. Introduction

II. Incoherent Sources of Continuum Radiation

III. Laser Sources

IV. Indirect Laser Sources

V. Summary

References

5 Tunable Infrared Laser Sources for Optoacoustic Spectroscopy

I. Introduction

II. Optical Mixers and Parametric Oscillators

III. Semiconductor Diode Lasers

IV. Raman Lasers

V. High-Pressure Gas Lasers

References

6 Infrared Optoacoustic Spectroscopy and Detection

I. Introduction

II. Vapor Detection-Identification and Quantitative Measurement

III. Applications to Vapor Detection

IV. Application of Optoacoustic Techniques to the Measurement of Molecular Relaxation Rates

V. Conclusion

References

7 Photoacoustic Spectroscopy of Gases in the Visible and Ultraviolet Spectral Regions

I. Introduction

II. Phase Angle and Amplitude

III. Experimental Technique

IV. Illustrative Spectra

References

8 Solid State Photoacoustic Spectroscopy

I. Introduction

II. Theory of the Photoacoustic Effect in Solids

III. Experimental Methodology

IV. Photoacoustic Spectroscopy in Physics and Chemistry

V. Photoacoustic Spectroscopy in Biology and Medicine

VI. Future Trends

References

Index