title: Pump-probe differencing technique for cavity-enhanced, noise-canceling saturation laser spectroscopy.
abstract: We present an experimental technique that permits mechanical-noise-free, cavity-enhanced frequency measurements of an atomic transition and its hyperfine structure. We employ the 532-nm frequency-doubled output from a Nd:YAG laser and an iodine vapor cell. The cell is placed in a folded ring cavity (FRC) with counterpropagating pump and probe beams. The FRC is locked with the Pound-Drever-Hall technique. Mechanical noise is rejected by differencing the pump and probe signals. In addition, this differenced error signal provides a sensitive measure of differential nonlinearity within the FRC.
authors.affiliation: Centre for Gravitational Physics, Faculty of Science, The Australian National University, Canberra, ACT 0200, Australia. glenn.devine@anu.edu.au
authors.forename: Glenn
authors.initials: G
authors.lastname: de Vine
authors.forename: David E
authors.initials: DE
authors.lastname: McClelland
authors.forename: Malcolm B
authors.initials: MB
authors.lastname: Gray
authors.forename: John D
authors.initials: JD
authors.lastname: Close