Radiation pressure and stability of interferometric gravitational-wave detectors

Chickarmane, Vijay ; Dhurandhar, Sanjeev V. ; Barillet, Roland ; Hello, Patrice ; Vinet, Jean-Yves (2000) Radiation pressure and stability of interferometric gravitational-wave detectors Applied Optics, 37 (15). pp. 3236-3245. ISSN 0003-6935

Full text not available from this repository.

Official URL: http://www.opticsinfobase.org/abstract.cfm?URI=ao-...

Related URL: http://dx.doi.org/10.1364/AO.37.003236


The effect of radiation pressure on the stability of Fabry-Perot cavities with hanging mirrors is investigated. Such cavities will form an integral part of the laser interferometric gravitational-wave detectors that are being constructed around the globe. The mirrors are hung by means of a pendulum suspension and are locked by servo controls. We assume a realistic servo-control transfer function that satisfies the standard stability criteria. We find that for positive offsets from the resonance of the cavity the system is stable. However, we show that for negative offsets instabilities can occur, although the servo system has the effect of increasing the instability threshold, compared with the nonservoed case. Conditions for stability are finally given, involving the finesse of the cavity, the input power, the mass of the mirrors, the servo gain, and the phase detuning from perfect resonance. Gravitational-wave detectors with arm cavities having a finesse as low as approximately 200 could exhibit instabilities. Some implications for the locking of these detectors are finally given.

Item Type:Article
Source:Copyright of this article belongs to Optical Society of America.
ID Code:9790
Deposited On:02 Nov 2010 04:04
Last Modified:30 May 2011 08:21

Repository Staff Only: item control page