Journal ArticleDOI
Picometer and nanoradian optical heterodyne interferometry for translation and tilt metrology of the LISA gravitational reference sensor
Thilo Schuldt,Martin Gohlke,Martin Gohlke,Dennis Weise,Ulrich Johann,Achim Peters,Claus Braxmaier +6 more
TLDR
In this paper, the authors present a compact heterodyne interferometer utilizing polarizing optics combined with the method of differential wavefront sensing (DWS) serving as a demonstrator for a complete optical readout system of the proof mass translation and attitude aboard the LISA satellites.Abstract:
The Laser Interferometer Space Antenna (LISA) aims at detecting gravitational waves by referencing heterodyne interferometry to free-flying (inertial) proof masses, located at the corners of a triangle with 5 million kilometers arm length. The position of each proof mass with respect to the associated satellite must be measured with 1 pm Hz−1/2-sensitivity in translation measurement and below 10 nrad Hz−1/2-sensitivity in attitude. In this paper, we present a compact heterodyne interferometer utilizing polarizing optics combined with the method of differential wavefront sensing (DWS) serving as a demonstrator for a complete optical readout system of the proof mass translation and attitude aboard the LISA satellites. Our interferometer is based on a highly symmetric design, where reference and measurement beam have similar optical paths and equal polarization and frequency. Intensity stabilization of the laser radiation, phaselock of the laser frequencies at the fiber outputs and a digital phase measurement based on a field programmable gate array (FPGA) are implemented to achieve noise levels below 10 pm Hz−1/2 and 10 nrad Hz−1/2, respectively, for frequencies >10−2 Hz.read more
Citations
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Journal ArticleDOI
Phasemeter core for intersatellite laser heterodyne interferometry: modelling, simulations and experiments
Oliver Gerberding,Benjamin Sheard,Iouri Bykov,Joachim Kullmann,Juan Jose Esteban Delgado,Karsten Danzmann,Gerhard Heinzel +6 more
TL;DR: In this paper, the authors present a precise model of an ADPLL that allows them to design such a readout algorithm and support their analysis by numerical performance measurements and experiments with analogue signals.
Journal ArticleDOI
Ultrastable assembly and integration technology for ground- and space-based optical systems.
Simon Ressel,Martin Gohlke,Dominik Rauen,Thilo Schuldt,Wolfgang Kronast,Ulrich Mescheder,Ulrich Johann,Dennis Weise,Claus Braxmaier +8 more
TL;DR: A novel adhesive bonding technology for setup of quasi-monolithic systems is presented and selected characteristics are compared to the well-established state-of-the-art technique of hydroxide-catalysis bonding to achieve an equivalent passive path length and tilt stability.
Journal ArticleDOI
Fiber-coupled displacement interferometry without periodic nonlinearity
TL;DR: A novel, general Joo-type interferometer that inherently has an optical reference after any fiber delivery that eliminates fiber-induced drift is described and demonstrated no detectable periodic nonlinearity in both free-space and fiber-delivered variants.
Journal ArticleDOI
A dual-heterodyne laser interferometer for simultaneous measurement of linear and angular displacements.
TL;DR: This paper presents a dual-heterodyne laser interferometer for simultaneously measuring linear and angular displacements with resolutions of picometer and nanoradian, respectively, based on cross-correlation analysis and realized by a PXI-bus data acquisition system.
Journal ArticleDOI
Ultrasensitive inverse weak-value tilt meter.
TL;DR: An interferometric technique for measuring ultrasmall tilts using a small misalignment of the interferometer, orthogonal to the plane of the tilt, a bimodal pattern is induced in the beam's transverse power distribution.
References
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Journal ArticleDOI
Automatic alignment of optical interferometers
TL;DR: A system for automatic alignment of optical interferometers relies on using differential phase modulation to permit the detection of the phase difference between two fundamental-mode Gaussian beams at the output of an interferometer.
Journal ArticleDOI
The LTP interferometer and phasemeter
Gerhard Heinzel,V. Wand,Antonio Garcia,Oliver Jennrich,Claus Braxmaier,D. I. Robertson,Kevin Middleton,D. Hoyland,Albrecht Rüdiger,Roland Schilling,Ulrich Johann,Karsten Danzmann +11 more
TL;DR: The LISA Technology Package (LTP) is a technology demonstration mission in preparation for the LISA space-borne gravitational wave detector as mentioned in this paper, which monitors the distance between two test masses with a noise level of 10 pm Hz−1/2 between 3 mHz and 30 mHz.
Journal ArticleDOI
Experimental demonstration of an automatic alignment system for optical interferometers.
TL;DR: An automatic alignment system, based on a differential phase-sensing technique described in a companion paper, has been experimentally demonstrated on the 10-m prototype laser interferometric gravitational wave detector in Glasgow.
Journal ArticleDOI
Linear interpolation of periodic error in a heterodyne laser interferometer at subnanometer levels (dimension measurement)
TL;DR: In this paper, the simple optical nonpolarization heterodyne interferometer is tested experimentally to understand and reduce fringe distortion, achieving an accuracy of 0.1 nm for the 633-nm He-Ne laser interFERometer.
Journal ArticleDOI
LISA Pathfinder drag-free control and system implications
TL;DR: In this paper, the top-level requirement of the LISA Pathfinder mission is the verification of pure relative free fall between two test masses with an accuracy of about 3 × 10−14 m s−2 Hz−1/2 in a measurement bandwidth between 1 mHz and 30 mHz.