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Proceedings Paper

Precision metrology length standard based on femtosecond stabilized laser
Author(s): R. Šmíd; O. Číp; J. Lazar
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Paper Abstract

We present in recent work release of very precise length standard based on laser frequency comb. Each frequency comb produces a frequency spectrum with equidistant modes frep with frequency offset fceo. Stabilized frequency comb produce a very precise frequency rule. Fabry-Perot cavity is frequently used as interferometer using a scanning mirror position. Depending on mirror coatings and reflectivity of mirrors one could obtain a spectrum of any laser adjusted to the Fabry-Perot cavity. Two methods of length stabilization using the Fabry-Perot cavity are presented and compared. One method uses the cavity of mirror distance defined by νcav as an integer multiple of frep. The second is based on selection of narrow part of the spectrum and very wide inter-mode frequency νcav. Two continuous working He-Ne stabilized lasers for coarse Fabry-Perot mirror spacing length adjustment were separated by different optical polarization and one stabilized frequency comb separated from both lasers operated at different central wavelength.

Paper Details

Date Published: 25 April 2008
PDF: 8 pages
Proc. SPIE 6995, Optical Micro- and Nanometrology in Microsystems Technology II, 69950M (25 April 2008); doi: 10.1117/12.782038
Show Author Affiliations
R. Šmíd, Institute of Scientific Instruments (Czech Republic)
O. Číp, Institute of Scientific Instruments (Czech Republic)
J. Lazar, Institute of Scientific Instruments (Czech Republic)

Published in SPIE Proceedings Vol. 6995:
Optical Micro- and Nanometrology in Microsystems Technology II
Christophe Gorecki; Anand Krishna Asundi; Wolfgang Osten, Editor(s)

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