Dr Johannes Eichholz

Eichholz, Johannes profile
Position Postdoctoral Fellow
Department Centre for Gravitational Astrophysics
Research group Centre for Gravitational Astrophysics
Office phone (02) 612 54079
Email
Office Physics New 3 43

High-bandwidth stabilisation of a 2µm-band laser

Gravitational wave detectors have reached the thermodynamic limit of optical coating performance and require novel coating materials and coating noise suppression techniques for further sensitivity improvements. This project is to design a high-bandwidth feedback control system to stabilise the intensity and frequency of a 2µm-band laser for investigations of thermal noise in experimental mirror coatings.

Dr Johannes Eichholz, A/Prof Bram Slagmolen, Distinguished Prof David McClelland

Measurement of optical and mechanical losses of mirror coatings

Gravitational wave detectors have reached the thermodynamic limit of optical coatings. Further sensitivity improvements require new coating materials and noise mitigation techniques. This project is about designing an experiment to measure the exponential decay of mechanical oscillator modes for determining key properties of optical coatings.

Dr Johannes Eichholz, A/Prof Bram Slagmolen, Distinguished Prof David McClelland

Low-noise offset-phase locking and heterodyne interferometry with 2µm-band lasers

Gravitational wave detectors have reached the thermodynamic limit of optical coating performance and require novel coating materials and noise mitigation techniques for further sensitivity improvements. This project is to implement a phase tracking system for the optical beat between two 2µm-band lasers for coating thermal noise measurements.

Dr Johannes Eichholz, A/Prof Bram Slagmolen, Distinguished Prof David McClelland

Spatial laser mode analysis for thermal noise measurements in optical cavities

Gravitational wave detectors have reached the thermodynamic limit of optical coatings. Further sensitivity improvements require new coating materials and noise mitigation techniques. This project models the behaviour of higher order spatial laser modes in optical resonators for measuring coating thermal noise directly.

Dr Johannes Eichholz, A/Prof Bram Slagmolen, Distinguished Prof David McClelland