date: 2020-12-30T00:30:32Z
pdf:unmappedUnicodeCharsPerPage: 18
pdf:PDFVersion: 1.7
pdf:docinfo:title: Applying Differential Wave-Front Sensing and Differential Power Sensing for Simultaneous Precise and Wide-Range Test-Mass Rotation Measurements
xmp:CreatorTool: LaTeX with hyperref package
Keywords: differential wave-front sensing; differential power sensing; deep frequency modulation interferometry; test-mass readout; torsion balance
access_permission:modify_annotations: true
access_permission:can_print_degraded: true
subject: We propose to combine differential wave-front sensing (DWS) and differential power sensing (DPS) in a Mach-Zehnder type interferometer for measuring the rotational dynamics of a test-mass. Using the DWS method, a high sensitive measurement of 6 nrad Hz-1/2 in sub-Hz frequencies can be provided around the test-mass nominal position (0.11 mrad), whereas the measurement of a wide rotation range (5 mrad) is realized by the DPS method. The interferometer can be combined with deep frequency modulation (DFM) interferometry for measurement of the test-mass translational dynamics. The setup and the resulting interferometric signals are verified by simulations. An optimization algorithm is applied to find suitable positions of the lenses and the waist size of the input laser in order to determine the best trade of between the slope of DWS, dynamic range of DPS, and the interferometric contrast. Our simulation further allows to investigate the layout for robustness and design tolerances. We compare our device with a recent experimental realization of a DFM interferometer and find that a practical implementation of the interferometer proposed here has the potential to provide translational and rotational test-mass tracking with state-of-the-art sensitivity. The simple and compact design, and especially the capability of sensing the test-mass rotation in a wide range and simultaneously providing a high-precision measurement close to the test-mass nominal position makes the design especially suitable for example for employment in torsion pendulum setups. 
dc:creator: Neda Meshksar, Moritz Mehmet, Katharina-Sophie Isleif and Gerhard Heinzel
dcterms:created: 2020-12-30T00:25:47Z
Last-Modified: 2020-12-30T00:30:32Z
dcterms:modified: 2020-12-30T00:30:32Z
dc:format: application/pdf; version=1.7
title: Applying Differential Wave-Front Sensing and Differential Power Sensing for Simultaneous Precise and Wide-Range Test-Mass Rotation Measurements
Last-Save-Date: 2020-12-30T00:30:32Z
pdf:docinfo:creator_tool: LaTeX with hyperref package
access_permission:fill_in_form: true
pdf:docinfo:keywords: differential wave-front sensing; differential power sensing; deep frequency modulation interferometry; test-mass readout; torsion balance
pdf:docinfo:modified: 2020-12-30T00:30:32Z
meta:save-date: 2020-12-30T00:30:32Z
pdf:encrypted: false
dc:title: Applying Differential Wave-Front Sensing and Differential Power Sensing for Simultaneous Precise and Wide-Range Test-Mass Rotation Measurements
modified: 2020-12-30T00:30:32Z
cp:subject: We propose to combine differential wave-front sensing (DWS) and differential power sensing (DPS) in a Mach-Zehnder type interferometer for measuring the rotational dynamics of a test-mass. Using the DWS method, a high sensitive measurement of 6 nrad Hz-1/2 in sub-Hz frequencies can be provided around the test-mass nominal position (0.11 mrad), whereas the measurement of a wide rotation range (5 mrad) is realized by the DPS method. The interferometer can be combined with deep frequency modulation (DFM) interferometry for measurement of the test-mass translational dynamics. The setup and the resulting interferometric signals are verified by simulations. An optimization algorithm is applied to find suitable positions of the lenses and the waist size of the input laser in order to determine the best trade of between the slope of DWS, dynamic range of DPS, and the interferometric contrast. Our simulation further allows to investigate the layout for robustness and design tolerances. We compare our device with a recent experimental realization of a DFM interferometer and find that a practical implementation of the interferometer proposed here has the potential to provide translational and rotational test-mass tracking with state-of-the-art sensitivity. The simple and compact design, and especially the capability of sensing the test-mass rotation in a wide range and simultaneously providing a high-precision measurement close to the test-mass nominal position makes the design especially suitable for example for employment in torsion pendulum setups. 
pdf:docinfo:subject: We propose to combine differential wave-front sensing (DWS) and differential power sensing (DPS) in a Mach-Zehnder type interferometer for measuring the rotational dynamics of a test-mass. Using the DWS method, a high sensitive measurement of 6 nrad Hz-1/2 in sub-Hz frequencies can be provided around the test-mass nominal position (0.11 mrad), whereas the measurement of a wide rotation range (5 mrad) is realized by the DPS method. The interferometer can be combined with deep frequency modulation (DFM) interferometry for measurement of the test-mass translational dynamics. The setup and the resulting interferometric signals are verified by simulations. An optimization algorithm is applied to find suitable positions of the lenses and the waist size of the input laser in order to determine the best trade of between the slope of DWS, dynamic range of DPS, and the interferometric contrast. Our simulation further allows to investigate the layout for robustness and design tolerances. We compare our device with a recent experimental realization of a DFM interferometer and find that a practical implementation of the interferometer proposed here has the potential to provide translational and rotational test-mass tracking with state-of-the-art sensitivity. The simple and compact design, and especially the capability of sensing the test-mass rotation in a wide range and simultaneously providing a high-precision measurement close to the test-mass nominal position makes the design especially suitable for example for employment in torsion pendulum setups. 
Content-Type: application/pdf
pdf:docinfo:creator: Neda Meshksar, Moritz Mehmet, Katharina-Sophie Isleif and Gerhard Heinzel
X-Parsed-By: org.apache.tika.parser.DefaultParser
creator: Neda Meshksar, Moritz Mehmet, Katharina-Sophie Isleif and Gerhard Heinzel
meta:author: Neda Meshksar, Moritz Mehmet, Katharina-Sophie Isleif and Gerhard Heinzel
dc:subject: differential wave-front sensing; differential power sensing; deep frequency modulation interferometry; test-mass readout; torsion balance
meta:creation-date: 2020-12-30T00:25:47Z
created: 2020-12-30T00:25:47Z
access_permission:extract_for_accessibility: true
access_permission:assemble_document: true
xmpTPg:NPages: 11
Creation-Date: 2020-12-30T00:25:47Z
pdf:charsPerPage: 3820
access_permission:extract_content: true
access_permission:can_print: true
meta:keyword: differential wave-front sensing; differential power sensing; deep frequency modulation interferometry; test-mass readout; torsion balance
Author: Neda Meshksar, Moritz Mehmet, Katharina-Sophie Isleif and Gerhard Heinzel
producer: pdfTeX-1.40.18
access_permission:can_modify: true
pdf:docinfo:producer: pdfTeX-1.40.18
pdf:docinfo:created: 2020-12-30T00:25:47Z