Elizabeth L Foley

US Patent:

20170160352, Jun 8, 2017

Filed:

Feb 20, 2017

Appl. No.:

15/437341

Inventors:

- Princeton NJ, US
Elizabeth Lee Foley - Princeton NJ, US

International Classification:

G01R 33/26

Abstract:

A compact, high-sensitivity magnetometer, including: an optical interface to accept a linearly polarized first light; a pump light source to produce a circularly polarized pump light; a vapor cell having a sealed vessel containing an alkali-metal gas, a first input port to receive the first light, a second input port to accept the pump light from a direction perpendicular to the first light, and an output port to produce a second light; an electromagnetic source to apply a modulated electromagnetic field to the vapor cell at a direction perpendicular to the first light and the pump light, without using a modulator external to the vapor cell; a second linear polarizer, polarized perpendicular to the first light, the second polarizer to receive the second light and to produce a third light; and a photodetector to receive the third light, to produce an intensity measurement of the third light.

US Patent:

20140247045, Sep 4, 2014

Filed:

Oct 15, 2013

Appl. No.:

14/054746

Inventors:

Thomas Whitmore Kornack - Princeton NJ, US
Elizabeth Lee Foley - Princeton NJ, US

Assignee:

TWINLEAF LLC - Princeton NJ

International Classification:

G01R 33/26

US Classification:

324304

Abstract:

A compact, high-sensitivity magnetometer, including: an optical interface to accept a linearly polarized first light; a pump light source to produce a circularly polarized pump light; a vapor cell comprising a sealed vessel containing an alkali-metal gas, a first input port to receive the first light, a second input port to accept the pump light from a direction perpendicular to the first light, and an output port configured to produce a second light; an electromagnetic source configured to apply an electromagnetic field to the vapor cell at a direction perpendicular to the first light and the pump light; a second linear polarizer, having an axis of polarization perpendicular to the first light, the second polarizer configured to receive the second light and to produce a third light; and a photodetector configured to receive the third light, to produce an intensity measurement of the third light.