Precision metrology length standard based on femtosecond stabilized laser

R. Šmíd; O. Číp; J. Lazar

doi:10.1117/12.782038

25 April 2008 Precision metrology length standard based on femtosecond stabilized laser

R. Šmíd, O. Číp, J. Lazar

Proceedings Volume 6995, Optical Micro- and Nanometrology in Microsystems Technology II; 69950M (2008) https://doi.org/10.1117/12.782038
Event: SPIE Photonics Europe, 2008, Strasbourg, France

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 f_rep with frequency offset f_ceo. 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 ν_cav as an integer multiple of f_rep. The second is based on selection of narrow part of the spectrum and very wide inter-mode frequency ν_cav. 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.

Citation Download Citation

R. Šmíd, O. Číp, and J. Lazar "Precision metrology length standard based on femtosecond stabilized laser", Proc. SPIE 6995, Optical Micro- and Nanometrology in Microsystems Technology II, 69950M (25 April 2008); https://doi.org/10.1117/12.782038

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