NIST has developed a compact atomic magnetometer and gyroscope that combines high sensitivity, simple fabrication, and small size. The device uses a diverging beam of light passing through an alkali atom vapor cell, allowing simultaneous measurement of rotation, rotation angle, and acceleration with a single source of atoms.
The key technical points are:
– Uses a single semiconductor laser and micromachined alkali vapor cell
– Measures both longitudinal and transverse spin polarizations
– Differential measurements with quadrant photodetector suppress noise
– Atomic magnetometer is a scalar sensor, important for moving platforms
The invention addresses the need for more sensitive, faster measurements and smaller designs for field use. It has significant potential for defense, aerospace, and autonomous vehicle applications.
Source: https://www.nist.gov/patents/compact-atomic-magnetometer-and-gyroscope
Keywords: atoms, magnetometer, gyroscope, sensitivity, quantum
