Title:
Ratiometric Nuclear Magnetic Resonance (NMR) Gyroscope System
Document Type and Number:
Japanese Patent JP6363631
Kind Code:
B2
Abstract:
An NMR gyroscope system (10) includes a vapor cell (12) that includes an alkali metal (14), a first gyromagnetic isotope (16), and a second gyromagnetic isotope (18), and a pump laser (22) generates an optical pump beam (OPT PMP ). A magnetic field generator (20) generates a magnetic field (B Z ) that is substantially aligned with a sensitive axis to cause the first and second gyromagnetic isotopes (16, 18) to counter-precess based on the optical pump beam (OPT PMP ) and the alkali metal (14). A probe laser (24) provides an optical probe beam (OPT PRB ) through the vapor cell (12) that exits the vapor cell (12) as a detection beam (OPT DET ), and a detection system (26, 50) monitors the detection beam (OPT DET ) and to determine a rotation (ROT) of the NMR gyroscope system (10) about a sensitive axis based on a modulation of the detection beam (OPT DET ) in response to precession of the first and second gyromagnetic isotopes (16, 18) and based on a predetermined constant ratio of precession of the first and second gyromagnetic isotopes (16, 18).
Inventors:
Robert Sea Griffith
Application Number:
JP2016002435A
Publication Date:
July 25, 2018
Filing Date:
January 08, 2016
Export Citation:
Assignee:
NORTHROP GRUMMAN SYSTEMS CORPORATION
International Classes:
G01C19/60; G01N24/00
Domestic Patent References:
| JP2014504729A |
Attorney, Agent or Firm:
Makoto Onda
Hironobu Onda
Atsushi Honda
Hironobu Onda
Atsushi Honda
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