title: Frequency-resolving spatiotemporal wave-front sensor.
abstract: We report on a high-resolution wave-front sensor that measures the complete spatial profile of any frequency component of a laser field containing multiple frequencies. This probe technique was developed to address the necessity of measuring the spatial overlap of the carrier field with each sideband component of the field exiting the output port of a gravitational-wave interferometer. We present the results of an experimental test of the probe, where we were able to construct the spatial profile of a single radio-frequency sideband at the level of -50 dBc.
authors.affiliation: LIGO Laboratory, Massachusetts Institute of Technology, NW17-161, Cambridge, Massachusetts 02139, USA.
authors.forename: Keisuke
authors.initials: K
authors.lastname: Goda
authors.forename: David
authors.initials: D
authors.lastname: Ottaway
authors.forename: Blair
authors.initials: B
authors.lastname: Connelly
authors.forename: Rana
authors.initials: R
authors.lastname: Adhikari
authors.forename: Nergis
authors.initials: N
authors.lastname: Mavalvala
authors.forename: Andri
authors.initials: A
authors.lastname: Gretarsson