Low-Frequency Noise Reduction in SQUID Measurements Using Laser Switching.
Abstract
Reduce SQUID noise in measurements which are intrinsically low frequency or dc. Such low frequency measurements fall below the 1/f knee of the noise energy spectrum and the SQUID performance is degraded substantially below the often quoted white noise levels. We intend to improve the low frequency noise using input circuit modulation at a frequency above the 1/f knee, up-converting the signal in frequency. In our scheme the noise should approach the SQUID white noise floor and the slew rates should approach the original SQUID system slew rate.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1992
- Accession Number
- ADA299595
Entities
People
- Blas Cabrera
Organizations
- Stanford University