Edwards, C S; Gill, P; Taylor, P (2000) Experimental verification of a swept-frequency laser interferometer for distance measurement. NPL Report. CBTLM 4

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Abstract

A swept-frequency Michelson interferometer system has been developed, based on a tunable visible laser diode with a stable Fabry-Perot cavity as a frequency sweep reference. Its performance has been verified by direct comparison with a displacement-measuring laser interferometer for path differences in the range 1 m to 20 m. The best fractional uncertainty of 3.2 x 10-6 is achieved at a distance of 8 m. The limitations of the technique are discussed, along with the scope for further improvements.

Item Type:	Report/Guide (NPL Report)
NPL Report No.:	CBTLM 4
Subjects:	Time and Frequency Time and Frequency > Optical Frequency Standards and Metrology
Last Modified:	02 Feb 2018 13:17
URI:	https://eprintspublications.npl.co.uk/id/eprint/1554