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Proceedings Paper

LISA laser noise cancellation test using time-delayed interferometry
Author(s): Andreas C. Kuhnert; Robert Spero; Alexander R. Abramovici; Bonny L. Schumaker; Daniel A. Shaddock
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Paper Abstract

The Laser-Interferometer-Space-Antenna (LISA) is a space-based interferometer with arm lengths of 5*10 9 m. Its design goal is to measure gravitational waves with a strain sensitivity of 10-23 at 10 mHz. Unlike in earth-based interferometers the arm lengths can differ by up to 2% or 108 m. For that reason frequency noise in the λ ~ 1 μm laser will not cancel in the direct interference signal. A laser locked to a ULE reference cavity in a 1°μK/square root Hz environment will have about 10 Hz/square root Hz frequency noise. The LISA sensitivity goal requires for the laser noise of less than 10-5 Hz/square root Hz, about a factor 10-6 below what has been achieved (1). Cancellation of laser frequency noise can be achieved by time-delayed-interferometry (TDI) (2,3). We describe a laboratory test of TDI with an unequal arm interferometer. The intent is to ascertain the performance limitations and proof-of-concept for 6 orders of magnitude frequency noise suppression.

Paper Details

Date Published: 26 February 2003
PDF: 4 pages
Proc. SPIE 4856, Gravitational-Wave Detection, (26 February 2003); doi: 10.1117/12.461501
Show Author Affiliations
Andreas C. Kuhnert, Jet Propulsion Lab. (United States)
Robert Spero, Jet Propulsion Lab. (United States)
Alexander R. Abramovici, Jet Propulsion Lab. (United States)
Bonny L. Schumaker, Jet Propulsion Lab. (United States)
Daniel A. Shaddock, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 4856:
Gravitational-Wave Detection
Peter Saulson; Adrian M. Cruise, Editor(s)

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