A probe includes first and second single-mode optical fibers with a semi-reflecting mirror between them. The second optical fiber is tapered by heating and pulling. The semi-reflecting mirror, the tapered portion, and the sample form a Fabry-Perot cavity. The probe can be used in a system having a differential interferometer which provides the appropriate path difference with a mirror on a piezoelectric transducer.
U.S. Patent and Trademark Office DescriptionPTO
Inventor(s) Christopher Davis
, Walaid Atia, Saeed Pilevar