Showing papers by "Jong H. Chow published in 2004"
TL;DR: An experimental technique to observe and accurately measure the Gouy phase evolution of Hermite-Gaussian modes is presented and the technique and its implications are discussed.
Abstract: This research was supported by the Australian Research
Council as part of the Australian Consortium
for Interferometric Gravitational Astronomy.
19 citations
TL;DR: In this paper, both the output spot size and orthogonality condition are invariant to the distance from the cavity beam waist, and the tilt-locking technique is used to verify the Guoy phase invariance.
Abstract: We present both the theory and an experimental method to accurately set up a Guoy phase telescope, where both the output spot size and orthogonality condition are invariant to distance from the cavity beam waist. We demonstrate that Gaussian spot size measurements can be used as a diagnostic to determine the desired locations of split area photodetectors. The Guoy phase invariance is verified using the tilt-locking technique.
6 citations
TL;DR: In this article, a phase sensitive technique for remote interrogation of passive Bragg grating Fabry-Perot resonators is presented. Butler et al. showed that when the laser is locked, this method detects differential phase shifts in the optical carrier relative to its sidebands, due to minute fiber optical path displacements.
Abstract: We discuss a phase-sensitive technique for remote interrogation of passive Bragg grating Fabry-Perot resonators. It is based on Pound-Drever-Hall laser frequency locking, using radio-frequency phase modulation sidebands to derive an error signal from the complex optical response, near resonance, of a Fabry-Perot interferometer. We examine how modulation frequency and resonance bandwidth affect this error signal. Experimental results are presented that demonstrate when the laser is locked, this method detects differential phase shifts in the optical carrier relative to its sidebands, due to minute fiber optical path displacements.
5 citations
TL;DR: The Australian Consortium for Gravitational Astronomy has built a High Optical Power Test Facility north of Perth, Western Australia as mentioned in this paper, where current experiments in collaboration with LIGO are testing thermal lensing compensation, and suspension control on an 80m baseline suspended optical cavity.
Abstract: The Australian Consortium for Gravitational Astronomy has built a High Optical Power Test Facility north of Perth, Western Australia. Current experiments in collaboration with LIGO are testing thermal lensing compensation, and suspension control on an 80m baseline suspended optical cavity. Future experiments will test radiation pressure instabilities and optical spring in a high power optical cavity with ~200kW circulating power. Once issues of operation and control have been resolved, the facility will go on to assess the noise performance of the high optical power technology through operation of an advanced interferometer with sapphire tests masses, and high performance suspension and isolation systems. The facility combines research and development undertaken by all consortium members, which latest results are presented.
2 citations