Interferometric high fidelity optical phase demodulation

Interferometric high fidelity optical phase demodulation

An illustrative interferometric system with high-fidelity optical phase demodulation includes a receiver having a fiberoptic coupler that produces optical mterferometry signals having mutual phase separations of 120° and balanced photo- detectors that each produce an electrical difference signal bas...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: BARFOOT, DAVID A
Format: Patent
Sprache:eng
Schlagworte:
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
PHYSICS
TESTING
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Beschreibung
Zusammenfassung:An illustrative interferometric system with high-fidelity optical phase demodulation includes a receiver having a fiberoptic coupler that produces optical mterferometry signals having mutual phase separations of 120° and balanced photo- detectors that each produce an electrical difference signal based on a respective pair of said optical mterferometry signals. The system further includes circuitry that converts the electrical difference signals into measurements of an interferometric phase.