Optische Pumpenstrahlsteuerung in einem Sensorsystem

Details

Veröffentlichungs-Nr.

EP3223030

Aktenzeichen

EP17161708

Anmeldetag

17. März 2017

Veröffentlichung

6. Oktober 2021

Erteilung

6. Oktober 2021

Rechtsraum

EP

IPC

G01R33/26G01C19/62G01R33/032G01R33/00// G01N24/00

Abstract

One example includes a sensor system. A cell system includes a pump laser which generates a pump beam to polarize alkali metal vapor enclosed within a sensor cell (108). A detection system includes a probe laser (128) to generate a probe beam. The detection system can calculate at least one measurable parameter based on characteristics of the probe beam passing through the sensor cell resulting from precession of the polarized alkali metal vapor in response to an applied magnetic field. A pump beam control system (104) pulse-width modulates a frequency of the pump beam to provide a pulse-width modulated (PWM) pump beam, and controls a duty-cycle of the PWM pump beam based on the characteristics of the probe beam passing through the sensor cell in a feedback manner to control polarization uniformity of the alkali metal vapor and to mitigate the effects of AC Stark shift on the at least one measurable parameter.

Anmelder

Firma

Northrop Grumman Systems Corporation

Land

🇺🇸 USA

Fachgebiete