Normalization method for acquiring interferometer phase shift from frequency division multiplexed fiber optic sensor arrays
US6600586B1 · kind B1 · utility
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4References
4Claims
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Key dates
| Filing date | May 10, 1999 |
| Grant date | Jul 29, 2003 |
| Priority date | — |
| Expiry date | May 10, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/35383
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical phase transient is added to the optical signal input to an interferometer sensor array in addition to a CW phase generated carrier used for acquisition of the interferometer phase shift. Detection of an error signal associated with the transient is used to adjust the modulation depth of the CW phase generated carrier to a null the error signal so that there is a known ratio between the coefficients of the sine and cosine terms in the interferometer output signal to allow for normalization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.