We have developed an optical-cavity system comprising birefringent mirrors for a vibration transducer. To obtain a dispersive-shape signal necessary for reading out the information of mirror vibration, we measure the polarization change of the cavity transmission light caused by the natural birefringence appearing on interferential mirrors; this effect is enhanced by the cavity resonance. Since there are no additional polarization-changing elements inside the cavity, we can achieve the high finesse that is indispensable for a highly sensitive vibration measurement. The principle and an experimental demonstration of the system are reported here.
© 1998 Optical Society of America
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(230.4040) Optical devices : Mirrors
(260.1440) Physical optics : Birefringence
Norikatsu Mio, Takahiro Yuzawa, and Shigenori Moriwaki, "Vibration transducer using an optical cavity comprising birefringent mirrors," Appl. Opt. 37, 166-169 (1998)