Optical Fiber Sensors

11Acousto-Optic Effect and Its Application in Optical Fibers

Alexandre de Almeida Prado Pohl

Contents

11.1 Introduction

11.2 Acoustic Waves in Optical Fibers

11.3 Acousto-Optic Modulators

11.4 Acousto-Optic Interaction in Fibers

11.5 Acousto-Optic Interaction in Fiber Gratings

11.5.1 Interaction of Fiber Bragg Gratings with Flexural Acoustic Modes

11.5.2 Interaction of Fiber Bragg Gratings with Longitudinal Acoustic Modes

11.5.3 Interaction of LPGs with Flexural Acoustic Modes

11.5.4 Switching Time of the Acousto-Optic Effect in Gratings

11.6 Acousto-Optic Interaction in Photonic Crystal Fibers

11.7 Application in Sensors

11.8 Conclusion

Acknowledgments

References

11.1 Introduction

Acoustics is the branch of physics that deals with the interaction ...