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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 23 — Nov. 5, 2012
  • pp: 25603–25612

Experimental verification of clock noise transfer and components for space based gravitational wave detectors

Dylan Sweeney and Guido Mueller  »View Author Affiliations


Optics Express, Vol. 20, Issue 23, pp. 25603-25612 (2012)
http://dx.doi.org/10.1364/OE.20.025603


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Abstract

The Laser Interferometer Space Antenna (LISA) and other space based gravitational wave detector designs require a laser communication subsystem to, among other things, transfer clock signals between spacecraft (SC) in order to cancel clock noise in post-processing. The original LISA baseline design requires frequency synthesizers to convert each SC clock into a 2 GHz signal, and electro-optic modulators (EOMs) to modulate this 2 GHz clock signal onto the laser light. Both the frequency synthesizers and the EOMs must operate with a phase fidelity of 2 × 10 4 cycles / H z. In this paper we present measurements of the phase fidelity of frequency synthesizers and EOMs. We found that both the frequency synthesizers and the EOMs meet the requirement when tested independently and together. We also performed an electronic test of the clock noise transfer using frequency synthesizers and the University of Florida LISA Interferometry (UFLIS) phasemeter. We found that by applying a time varying fractional delay filter we could suppress the clock noise to a level below our measurement limit, which is currently determined by timing jitter and is less than an order of magnitude above the LISA requirement for phase measurements.

© 2012 OSA

OCIS Codes
(060.2630) Fiber optics and optical communications : Frequency modulation
(060.4510) Fiber optics and optical communications : Optical communications
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(250.0250) Optoelectronics : Optoelectronics
(350.1270) Other areas of optics : Astronomy and astrophysics

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: August 1, 2012
Revised Manuscript: September 10, 2012
Manuscript Accepted: September 10, 2012
Published: October 26, 2012

Citation
Dylan Sweeney and Guido Mueller, "Experimental verification of clock noise transfer and components for space based gravitational wave detectors," Opt. Express 20, 25603-25612 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-23-25603


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References

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