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Fabry-Perot Displacement Interferometry


High-resolution Fabry-Perot interferometry is being developed and employed for mechanical displacement metrology, linking optical measurements to the atomic time standard using laser frequency combs.


NIST has recently initiated a program to develop a new standard of electrical capacitance. The approach employs a dynamic electrode geometry in conjunction with precision optical metrology. We will use high-resolution Fabry-Perot interferometry to measure the mechanical displacement of an electrode in a "calculable capacitor," and link the optical measurement to an atomic standard of time by means of a femtosecond-laser frequency comb. This work involves a close collaboration between the Physics Laboratory, Electronics and Electrical Engineering Laboratory, and the Manufacturing Engineering Laboratory.

Activities underway and planned:

*Design and build a new Fabry-Perot interferometer system employing narrow-linewidth telecom lasers and a rubidium frequency reference

*Replace the rubidium reference with a femtosecond-laser frequency comb for greater accuracy


Start Date:

October 19, 2010

Lead Organizational Unit:


For Technical Inquiries:

John Lawall, NIST Staff
100 Bureau Drive, M/S 8423
Bldg 217/ A229
Gaithersburg, MD 20899

301-975-3226 Telephone
301-975-5485 Facsimile
Mathieu Durand, Guest Researcher (DIV 697)
Utku Kemiktarak, Guest Researcher
Michael Metcalfe, Guest Researcher