Probe beam frequency stabilization in an atomic sensor system
US9500725B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 6, 2013 |
| Grant date | Nov 22, 2016 |
| Priority date | — |
| Expiry date | May 11, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/62
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An atomic sensor system includes a magnetic field generator configured to generate a magnetic field along an axis and a probe laser configured to generate an optical probe beam. Beam optics direct the optical probe beam through a sensor cell comprising an alkali metal vapor such that the optical probe beam has at least a vector component along the axis. The system also includes detection optics comprising a photodetector assembly configured to measure a Faraday rotation associated with the optical probe beam exiting the sensor cell and to generate a feedback signal based on the Faraday rotation associated with the optical probe beam exiting the sensor cell. The system further includes a laser controller configured to modulate a frequency of the optical probe beam about a center frequency and to substantially stabilize the center frequency of the optical probe beam based on the feedback signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.