ABSTRACT
Interferometers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .395 15.4.2.4 Measurement of Displacements in Passive Optical
Cavities: The Pound-Drever-Hall Method . . . . . . . . . . . . .397 15.4.3 Polarization-Modulated Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . .398 15.4.4 Wavelength-/Frequency-Modulated Sensors . . . . . . . . . . . . . . . . . . .400 15.4.4.1 Fiber Bragg Grating Sensors . . . . . . . . . . . . . . . . . . . . . . . .400 15.4.4.2 Long-Period Fiber Grating Sensors . . . . . . . . . . . . . . . . . . .404 15.4.4.3 Tilted Gratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .405
