Title :
Observation of 4.2 equilibrium noise squeezing via a Josephson-parametric amplifier
Author :
Yurke, B. ; Kaminsky, P.G. ; Miller, R.E. ; Whittaker, E.A. ; Smith, A.D. ; Silver, A.H. ; Simon, R.W.
Author_Institution :
AT&T Bell Lab., Murray Hill, NJ, USA
fDate :
3/1/1989 12:00:00 AM
Abstract :
The authors observed the squeezing of 4.2 K thermal noise using a Josephson parametric amplifier operated in the degenerate mode at 19.4 GHz. A 42% reduction in the equilibrium noise was observed. The amplifier has also been operated at 0.1 K with an excess noise of 0.28 K referred to the amplifier´s input port. This is less than the vacuum fluctuation noise of 0.47 K at the amplifier´s input. Recently the amplifier has been operated in a nonchaotic mode with a signal gain in excess of 16 dB
Keywords :
Josephson effect; electron device noise; microwave parametric amplifiers; solid-state microwave circuits; superconducting junction devices; thermal noise; 0.1 to 4.2 K; 16 dB; 19.4 GHz; Josephson-parametric amplifier; SHF; degenerate mode; equilibrium noise squeezing; nonchaotic mode; superconducting junction device; thermal noise; Fluctuations; Frequency; Noise generators; Noise level; Noise reduction; Optical amplifiers; Optical interferometry; Optical noise; Space technology; Spectroscopy;
Journal_Title :
Magnetics, IEEE Transactions on
