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Control of the double pendulum optics suspension system of a 30 m triangular Fabry–Pérot cavity (2000)

Barsuglia, M. ; Bondu, F. ; Heitmann, H. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 71 (2000), S. 2890-2894

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Details

ISSN: 1089-7623

Quelle: AIP Digital Archive

Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik

Notizen: We present a technique for the control of a double pendulum suspension system used to carry the optical elements of a 30 m long Fabry–Pérot cavity, a prototype for the mode cleaner of the VIRGO experiment. The movement of the payload is sensed with a charge coupled device camera, and the feedback forces are applied to the intermediate stage of the suspension via coil–magnet systems. The control strategy is explained and the application of the system for the longitudinal locking of the cavity is demonstrated. © 2000 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1150708

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Digitale Medien

A diode-laser optical frequency standard based on laser-cooled Ca atoms: Sub-kilohertz spectroscopy by optical shelving detection (1999)

Oates, C.W. ; Bondu, F. ; Fox, R.W. ; [weitere]

Springer

The European physical journal 7 (1999), S. 449-460

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ISSN: 1434-6079

Schlagwort(e): PACS. 32.80.Pj Optical cooling of atoms; trapping - 42.55.Px Semiconductor lasers; laser diodes - 42.62.Fi Laser spectroscopy

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract: We report an optical frequency standard at 657 nm based on laser-cooled/trapped Ca atoms. The system consists of a novel, compact magneto-optic trap which uses 50 mW of frequency-doubled diode laser light at 423 nm and can trap 〉107 Ca atoms in 20 ms. High resolution spectroscopy on this atomic sample using the narrow 657 nm intercombination line resolves linewidths (FWHM) as narrow as 400 Hz, the natural linewidth of the transition. The spectroscopic signal-to-noise ratio is enhanced by an order of magnitude with the implementation of a “shelving" detection scheme on the 423 nm transition. Our present apparatus achieves a fractional frequency instability of in 1 s with a potential atom shot-noise-limited performance of and excellent prospects for high accuracy.