Coupling of wavefront errors and jitter in the LISA interferometer: far-field propagation

The Laser Interferometer Space Antenna (LISA) is a gravitational wave detector, which aims to detect 10−20 strains in the frequency range from 0.1 mHz to 0.1 Hz. It is a constellation of three spacecrafts, an equilateral triangle with side length of m, where interferometry monitors the spacecraft di...

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Bibliographic Details
Published in:Classical and quantum gravity 2018-09, Vol.35 (18), p.185013
Main Authors: Sasso, C P, Mana, G, Mottini, S
Format: Article
Language:English
Subjects:
gravitational waves measurement
Laser Interferometer Space Antenna (LISA)
long baseline optical interferometry
optical far field propagation
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Summary:The Laser Interferometer Space Antenna (LISA) is a gravitational wave detector, which aims to detect 10−20 strains in the frequency range from 0.1 mHz to 0.1 Hz. It is a constellation of three spacecrafts, an equilateral triangle with side length of m, where interferometry monitors the spacecraft distances. Aberrations and jitter of the wavefront sent by a spacecraft to the next combine to cause a measurement noise. The paper investigates analytically this coupling, including beam clipping and far-field propagation, and develops criteria for the assessment of the wavefront quality. It also gives the results of Monte Carlo simulations of the measurement noise for arbitrary wavefront aberrations and jitters.
ISSN:0264-9381
1361-6382
DOI:10.1088/1361-6382/aad7f5