title: Optical frequency standard using acetylene-filled hollow-core photonic crystal fibers.
abstract: Gas-filled hollow-core photonic crystal fibers are used to stabilize a fiber laser to the 13C2H2 P(16) (ν1+ν3) transition at 1542 nm using saturated absorption. Four hollow-core fibers with different crystal structure are compared in terms of long term lock-point repeatability and fractional frequency instability. The locked fiber laser shows a fractional frequency instability below 4 × 10(-12) for averaging time up to 10(4) s. The lock-point repeatability over more than 1 year is 1.3 × 10(-11), corresponding to a standard deviation of 2.5 kHz. A complete experimental investigation of the light-matter interaction between the spatial modes excited in the fibers and the frequency of the locked laser is presented. A simple theoretical model that explains the interaction is also developed.
authors.forename: Marco
authors.initials: M
authors.lastname: Triches
authors.forename: Mattia
authors.initials: M
authors.lastname: Michieletto
authors.forename: Jan
authors.initials: J
authors.lastname: Hald
authors.forename: Jens K
authors.initials: JK
authors.lastname: Lyngsø
authors.forename: Jesper
authors.initials: J
authors.lastname: Lægsgaard
authors.forename: Ole
authors.initials: O
authors.lastname: Bang