Physics
Scientific paper
Jun 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..523..200b&link_type=abstract
GRAVITATIONAL WAVES: Third Edoardo Amaldi Conference. AIP Conference Proceedings, Volume 523, pp. 200-203 (2000).
Physics
Interferometers, Gravitational Wave Detectors And Experiments
Scientific paper
We present a delay-line polarization Sagnac (1) interferometer that utilizes the increased laser power which will likely be available to future advanced detectors (2) to greatly simplify many laser and interferometer control requirement. We describe how the signal sidebands and the local oscillator are made common path by using a polarizing beamsplitter and controlling the circulating light's polarization state. The common path nature of the interfering beams simplify alignment, reduce the interferometer control effort, and lower the laser amplitude and frequency stability requirements by 6 orders of magnitude over a frontally modulated Michelson interferometer. We present experimental verifications of the robustness of this configuration, which was implemented on a 2m tabletop interferometer .
Beyersdorf Peter T.
Byer Robert L.
Fejer Martin M.
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