Thermal tuning of a fiber-optic interferometer for maximum sensitivity

K. J. Bruland, J. L. Garbini, W. M. Dougherty, S. H. Chao, S. E. Jensen, J. A. Sidles

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


We describe a fiber-optic interferometer that employs wavelength changes to achieve maximum sensitivity. Wavelength changes are induced by adjusting the operating temperature of the laser, eliminating the need for an actuator to vary the spacing between the sensing fiber and the object to be monitored. The instrument and techniques described are suitable for cryogenic, high vacuum applications such as magnetic resonance force microscopy, where space is limited and micromanipulation can be challenging. The noise floor of 1.6×10-3 nm/ √Hz is adequate for monitoring subangstrom displacement of force microscope cantilevers.

Original languageEnglish (US)
Pages (from-to)3542-3544
Number of pages3
JournalReview of Scientific Instruments
Issue number9
StatePublished - 1999
Externally publishedYes

ASJC Scopus subject areas

  • Instrumentation


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