Integrated optics magnetic sensor from 2 kHz to 9 GHz

Bao Sun; Fushen Chen; Kaixin Chen

doi:10.1364/AO.50.001570

Integrated optics magnetic sensor from 2 kHz to 9 GHz

Bao Sun, Fushen Chen, and Kaixin Chen

Applied Optics
Vol. 50,
Issue 11,
pp. 1570-1574
(2011)
•https://doi.org/10.1364/AO.50.001570

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Bao Sun, Fushen Chen, and Kaixin Chen, "Integrated optics magnetic sensor from 2 kHz to 9 GHz," Appl. Opt. 50, 1570-1574 (2011)

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Related Topics
Table of Contents Category
- Integrated Optics
Optics & Photonics Topics
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The topics in this list come from the OSA Optics and Photonics Topics applied to this article.
Previously assigned OCIS codes
- Integrated optics devices (130.3120)
- Optical sensing and sensors (280.4788)

About this Article
History
- Original Manuscript: September 21, 2010
- Revised Manuscript: February 8, 2011
- Manuscript Accepted: February 15, 2011
- Published: April 6, 2011

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Abstract

A new type of integrated optical magnetic field sensor is presented in this paper. The proposed sensor consists of a Mach–Zehnder waveguide interferometer and a doubly loaded loop antenna. Such a structure can successfully avoid detection of the undesired electric field signal. The size of the sensor is $35 mm \times 6 mm \times 1 mm$ . The measurements show that the frequency response is from $2 kHz$ to $9 GHz$ , the dynamic range is $98 dB$ , and the minimum detectable magnetic field is $51.8 μA / m$ at $1 GHz$ . Therefore, this sensing system can be used in electromagnetic compatibility measurements.

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Loop width a	$0.5 mm$
Loop aperture side b	$6 mm$
Electrode length L	$5 mm$
Optical bias angle $φ_{0}$	$π / 2$
Refractive index $n_{e}$	2.14
Capacitance of modulator $C_{m}$	$0.5 pF / mm$
Resistance of electrode	$50 Ω$
Optical input power $P_{in}$	$1 mW$
Insertion loss of the sensor α	$5 dB$
Magnetic field intensity H	$0.1 A / m$

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