"The ambitious Einstein Telescope (ET) project aims to prove an up-close examination of gravitational waves originating from sources near the birth of the Universe. This study's objective is to investigate parameter specifications for the interferometer's mirrors, including the level of surface distortion necessary for the detector to operate at the required sensitivity.
To achieve this, we...
The Einstein Telescope uses laser light to precisely monitor the distance between two freely hanging mirrors placed several kilometres apart, to search for traces of gravitational waves that are passing by. The mirrors are made from large silicon crystals and require a specific laser colour for best sensitivity. This research shows how combining this laser light with another laser colour can...
In this poster we present optics prototyping procedures, including sillicon optics, that are relevant to production, metrology and assembly of components for ET Pf and future full scale GW interferometers. We present several case studies and illustrate benefits of our procedures and integrated in-house production process.
In this poster I will present semi-analytic code designed to simulate modal propagation and coupling of Hermite-Gauss laser modes in and out of the Input and Output mode cleaner cavities that will be used on R&D and 3G detectors. Outputs from the code are graphical plots that serve as heuristic tools for narrowing down choices of cavity parameters (RoC, L, Finesse, internal angles etc.). The...
Highly-reflective coated mirrors are the heart of interferometric gravitational-wave detectors, such as LIGO, Virgo and the planned Einstein Telescope. However, thermal noise of the coatings is one of the limiting noise sources of the detectors, preventing us from seeing weaker, more distant or new astrophysical objects. Besides reduced thermal noise, there are also a number of strict...
New challenges in gravitational-wave astrophysics impose increasing sensitivity of current interferometric detectors operating at room temperature as Advanced LIGO and Advanced Virgo. Limits at their most sensitive frequency region arise from the Brownian thermal noise of the highly-reflective coatings on the interferometer mirrors. Such coatings are composed of alternating layers of low- and...
In gravitational detectors, the presence of numerous subsystems, each governed by distinct control loops with numerous parameters, presents a complex optimization challenge. This poster addresses the optimization problem by employing H-infinity (H-inf) and H-2 control techniques to enhance the performance of these subsystems. Our goal is to optimize a cost function that reflects an overall...
Interferometric gravitational-wave detectors have opened a new window into the Universe, creating new opportunities in the branch of astrophysics. While current detectors allow for successful detections, there is a need to increase their sensitivity by trying to enlarge their frequency band to observe additional types of gravitational waves sources. Future cryogenic detectors such as the...
The forthcoming era of gravitational wave detectors, exemplified by the Einstein Telescope, demands unprecedented levels of sensitivity. Central to this
progress is the deployment of cryogenic low-frequency interferometers, hinging
on silicon as the mirror substrate material. A critical hurdle lies in mitigating
coating thermal noise, a main limiting factor to detector precision. This...
The discovery of gravitational waves paved the way for a new way of seeing the Universe, but above all, it paved the way for the development of new technologies.
Since the first gravitational-wave detection much progress has been made and the technology that allowed us to explore this new field has been renewed.
The cornerstone of this research remains the Michelson interferometer, whose...
A gravitational wave detector can measure small periodic distortions in spacetime known as gravitational waves. Improvement in the sensitivity of these detectors can help gain new insight into physics. These instruments require mirror coatings made of low and high refractive index layers with very low coating thermal noise. Future detectors, such as the Einstein Telescope, will operate at...
