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.

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

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