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Experimental Demonstration of Squeezing in a PR Interferometer

Student Kirk McKenzie, under the supervision of Dr. Daniel Shaddock and Prof. David McClelland at ACIGA Gravitational Wave Research Facility, showcases squeezing in a PR interferometer. Squeezing has seen a recent revival in interest in the GW community, especially with LIGO II expected to be radiation pressure noise limited. This demonstration explores the applicability of squeezing in GW detectors, highlighting the potential for advanced signal extraction methods at 1064nm.

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Experimental Demonstration of Squeezing in a PR Interferometer

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  1. Experimental demonstration of squeezing in a PR Interferometer • Student: • Kirk McKenzie • Supervisors: • Dr Daniel Shaddock • Prof David McClelland • Department: • ACIGA Gravitational Wave Research Facility • Department of Physics • Australian National Uni LSC 2002 LIGO-G020150-00-Z

  2. Squeezing and GW detectors • Early theoretical work by Braginsky and Caves ~ 1980 • A few demonstrations on simple interferometers eg Mach Zehnder [1] and polarimeter [2] ~1987 • In the last few years there has been a revival of interest in squeezing in the GW community as LIGO II is expected to be radiation pressure noise limited (at low frequencies). [1] M. Xiao, L.-A. Wu and H.J. Kimble, Phys. Rev Lett. 59 (1987) [2] P. Grangier, R.E. Slusher, B. Yurke and A. LaPorta, Phys. Rev. Lett. 59 (1987) LSC 2002 LIGO-G020150-00-Z

  3. LSC 2002 LIGO-G020150-00-Z

  4. (2.9) (4.8) (0.35) (0.51) LSC 2002 LIGO-G020150-00-Z

  5. Squeezing Applicability • Realistic (sub)configuration • Advanced LIGO signal extraction method (offset locking) • All at 1064nm • Low frequency squeezing should not be a problem with GW detector • Interferometer and squeezing LOCKED • Results limited by losses in our isolator~15% • But isolator loss less than 0.5% achievable! LSC 2002 LIGO-G020150-00-Z

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