U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

A Low-Power, High-Sensitivity Micromachined Optical Magnetometer

Published

Author(s)

Rahul R. Mhaskar, Svenja A. Knappe, John E. Kitching

Abstract

We demonstrate a fiber-optically coupled optical magnetometer based on a microfabricated 87Rb vapor cell in a micromachined silicon sensor head. The cell is optically heated with light at 1.5 mm brought to the cell through an optical fiber and absorbed by colored filters attached to the cell windows. A second fiber-optically coupled probe beam optically pumps and interrogates the atoms. A sensitivity below 20 fΤ/√Hz is achieved in the frequency band from 15 Hz to 100 Hz. Such a sensor might find application in measurements of magnetic fields from biological sources such as the human heart and brain.
Citation
Applied Physics Letters
Volume
101
Pub Type
Journals

Download Paper

https://doi.org/10.1063/1.4770361

Keywords

Atomic spectroscopy, Biomagnetic measurements, Magnetic resonances, Micro-electro-mechanical systems (MEMS), Optical magnetometers
Physics

Citation

Mhaskar, R. , Knappe, S. and Kitching, J. (2012), A Low-Power, High-Sensitivity Micromachined Optical Magnetometer, Applied Physics Letters, [online], https://doi.org/10.1063/1.4770361 (Accessed April 19, 2024)

Created December 11, 2012, Updated November 10, 2018