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Proceedings Paper

Tunable laser sources for absolute optical interferometry
Author(s): Umberto Minoni; Enea Gelmini; Franco Docchio; Umberto U. Perini
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Paper Abstract

Absolute interferometry is based on the use of an optical synthetic wavelength generated by two beating lasers. To obtain high-resolution, absolute measurements over a wide range it is necessary to use multiple synthetic wavelengths. A tunable synthetic wavelength generator would be the ideal solution for this purpose. In this paper, two configurations based on the use of two diode lasers and two diode-pumped Nd:YAG lasers are discussed. The paper presents the optical set-up for the generation of the synthetic wavelength, the necessary frequency-locking electronics, and experimental results from two prototypes.

Paper Details

Date Published: 4 January 1995
PDF: 5 pages
Proc. SPIE 2349, Industrial Optical Sensors for Metrology and Inspection, (4 January 1995); doi: 10.1117/12.198677
Show Author Affiliations
Umberto Minoni, Univ. di Brescia (Italy)
Enea Gelmini, Univ. di Brescia (Italy)
Franco Docchio, Univ. di Brescia (Italy)
Umberto U. Perini, CISE SpA (Italy)

Published in SPIE Proceedings Vol. 2349:
Industrial Optical Sensors for Metrology and Inspection
Kevin G. Harding; H. Philip Stahl, Editor(s)

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