Title :
Progress towards measuring the standard quantum limit using a monolithic sapphire transducer
Author :
Locke, C.R. ; Tobar, M.E. ; Ivanov, E.N.
Author_Institution :
Dept. of Phys., Western Australia Univ., Nedlands, WA, Australia
Abstract :
The operation of a novel monolithic sapphire transducer (MST) that has low mechanical and electrical losses is presented. The MST senses the motion of internal acoustic resonances through the interaction between electric and acoustic fields. Progress towards measuring the standard quantum limit by implementing a cryogenic MST is described.
Keywords :
Q-factor; acoustic resonance; dielectric resonator oscillators; fluctuations; harmonic oscillators; indeterminancy; measurement theory; quantum noise; sapphire; thermal noise; Al/sub 2/O/sub 3/; cryogenic sapphire transducer; electric-acoustic field interaction; high Q factor; internal acoustic resonance sensing; microwave resonance; monolithic sapphire transducer; noise contributions; quantum fluctuations; standard quantum limit measurement; thermal Nyquist noise; whispering gallery modes; Acoustic measurements; Acoustic noise; Acoustic transducers; Measurement standards; Mechanical variables measurement; Noise measurement; Noise reduction; Oscillators; Phase noise; Q measurement;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2000 Conference on
Conference_Location :
Sydney, NSW, Australia
Print_ISBN :
0-7803-5744-2
DOI :
10.1109/CPEM.2000.850942
