title: Collinear interferometer with variable delay for carrier-envelope offset frequency measurement.
abstract: We demonstrate a novel scheme for measuring the carrier-envelope offset frequency in a femtosecond optical frequency comb. Our method is based on a common-path interferometer with a calcite Babinet-Soleil compensator employed to control the delay between the two interfering beams of pulses. The large delay range (up to 8 ps) of our device is sufficient for systems that rely on spectral broadening in microstructured fibers. We show an experimental proof that the stability of a common-path arrangement is superior to that of the standard interferometers.
authors.affiliation: Institute of Experimental Physics, University of Warsaw, ul. Hoza 69, 00-681 Warsaw, Poland. monika@kopernik.edu.pl
authors.forename: Monika
authors.initials: M
authors.lastname: Pawłowska
authors.forename: Filip
authors.initials: F
authors.lastname: Ozimek
authors.forename: Piotr
authors.initials: P
authors.lastname: Fita
authors.forename: Czesław
authors.initials: C
authors.lastname: Radzewicz