Improved fiber-optic magnetometer based on iron garnet crystals

被引：0
|
作者：
Rochford, KB [1 ]
Espejo, RJ [1 ]
Rose, AH [1 ]
Dyer, SD [1 ]
机构：
[1] Natl Inst Stand & Technol, Boulder, CO 80303 USA
来源：
14TH INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS | 2000年 / 4185卷
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D O I：
暂无
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate a single-lead fiber optic magnetic field sensor system based on ferrimagnetic iron garnet crystals. This system automatically compensates for magnetic domain fluctuations in the transducer. Noise floors of 1.1 nT/Hz(1/2) at 1 kHz are demonstrated without ferrite flux concentrators. Use of a single distal ferrite flux concentrator improves the sensitivity and noise floor by 17 dB with a frequency response of similar to 180 MHz; this represents a 3x improvement in gain-bandwidth product over previous reports. Using a pair of flux concentrators yields a 29 dB improvement and a noise floor of 35 pT/Hz(1/2) at 1 kHz.
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收藏
页码：332 / 335
页数：4
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