An active fiber sensor for mirror vibration metrology in astronomical interferometers

TL;DR

This paper introduces an active fiber sensor capable of precisely measuring mirror vibrations in astronomical interferometers, achieving high-frequency detection with nanometer accuracy to improve telescope array performance.

Contribution

The paper presents a novel active fiber sensor design that effectively measures mirror vibrations up to 100 Hz with sub-10 nanometer precision, enhancing interferometric metrology.

Findings

Meets vibration measurement up to 100 Hz

Achieves better than 10 nm precision

Demonstrates potential for astronomical interferometry

Abstract

We present a fiber sensor based on an active integrated component which could be effectively used to measure the longitudinal vibration modes of telescope mirrors in an interferometric array. We demonstrate the possibility to measure vibrations with frequencies up to $\simeq 100$ Hz with a precision better than 10 nm.