hide
Free keywords:
Astrophysics, Instrumentation and Methods for Astrophysics, astro-ph.IM, Physics, Optics, physics.optics
Abstract:
Deep frequency modulation interferometry combines optical minimalism with
multi-fringe readout, precision however is key for applications such as optical
gradiometers for satellite geodesy or as dimensional sensor for ground-based
gravity experiments. We present a single-component interferometer smaller than
a cubic inch. Two of these are compared to each other to demonstrate tilt and
displacement measurements with a precision of less than
$20\,\mathrm{nrad}/\sqrt{\mathrm{Hz}}$ and $1\,\mathrm{pm}/\sqrt{\mathrm{Hz}}$
at frequencies below $1\,\mathrm{Hz}$.
