The COAST Interferometer

The Palomar Testbed Interferometer

The Palomar Testbed Interferometer (PTI) is a long-baseline infrared interferometer located at Palomar Observatory, California. It was built as a testbed for interferometric techniques applicable to the Keck Interferometer. First fringes were obtained in July 1995. PTI implements a dual-star architecture, tracking two stars simultaneously for phase referencing and narrow-angle astrometry. The t...

The LTP interferometer and phasemeter

1 Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), Callinstrasse 38, D-30167 Hannover, Germany 2 ESTEC, Noordwijk, The Netherlands 3 Astrium GmbH, 88039 Friedrichshafen, Germany 4 Department of Physics and Astronomy, University of Glasgow, Glasgow, UK 5 Rutherford Appleton Laboratories, Chilton, UK 6 University of Birmingham, Birmingham, UK 7 Universität Hannover, Institut...

The NIST Length Scale Interferometer

National Institute of Standards and Technology, Gaithersburg, MD 20899-0001 The National Institute of Standards and Technology (NIST) interferometer for measuring graduated length scales has been in use since 1965. It was developed in response to the redefinition of the meter in 1960 from the prototype platinum-iridium bar to the wavelength of light. The history of the interferometer is recalle...

The quantum-optical Josephson interferometer

The photon-blockade effect, where nonlinearities at the single-photon level alter the quantum statistics of light emitted from a cavity1, has been observed in cavity quantum electrodynamics experiments with atomic2,3 and solid-state systems4–8. Motivated by the success of single-cavity quantum electrodynamics experiments, the focus has recently shifted to the exploration of the rich physics pro...

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