Fringe locking subsystem and methods of making and using the same
US8363224B2 · kind B2 · utility
3Cited by
5References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 31, 2010 |
| Grant date | Jan 29, 2013 |
| Priority date | — |
| Expiry date | Aug 3, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/45
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fringe locking subsystem for an optical sensing cavity is provided. The subsystem comprises one or more photo detectors that detect a reference signal and a cavity signal; a first amplifier that generates a calculated differential between the reference signal and the cavity signal; a lock-in amplifier that generates a modulation signal based on the calculated differential; and a controller that adjusts a distance within the cavity based on the modulation signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.