Experimental test of a prototype gravitational radiation detector employing an active cavity laser sensor

Details Experimental test of a prototype gravitational radiation detector employing an active cavity laser sensor Experimental test of a prototype gravitational radiation detector employing an active cavity laser sensor

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jphe...19..182a&link_type=abstract

Journal of Physics E - Scientific Instruments (ISSN 0022-3735), vol. 19, March 1986, p. 182-188.

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Applications

8

Cavity Resonators, Gravitational Wave Antennas, Helium-Neon Lasers, Heterodyning, Laser Applications, Radiation Detectors, Block Diagrams, Calibrating, Demodulators, Frequency Modulation, Mirrors, Thermal Noise

Scientific paper

A prototype gravitational radiation detector which uses two small He-Ne lasers in a heterodyne arrangement for displacement sensing has been built and tested. Operation of the system at the theoretical noise limit determined by spontaneous emission has been achieved. Above 2 kHz, the noise has a flat spectrum and is equivalent to displacements of 3 x 10 to the -15th cm/sq rt Hz. It is shown that small active-cavity systems can be competitive with long-baseline Michelson interferometers when the high-quality mirrors and high-gain amplifying media now available are used.

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