MAGNETOOPTIC MAGNETIC-FIELD SENSORS BASED ON UNIAXIAL IRON-GARNET FILMS IN OPTICAL WAVE-GUIDE GEOMETRY

被引：13

作者：

DEETER, MN ^{[1
]}

DAY, GW ^{[1
]}

WOLFE, R ^{[1
]}

FRATELLO, VJ ^{[1
]}

机构：

[1] AT&T BELL LABS,MURRAY HILL,NJ 07974

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1993年 / 29卷 / 06期

关键词：

D O I：

10.1109/20.280828

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Iron garnet films which exhibit perpendicular uniaxial magnetic anisotropy are promising materials for magneto-optic magnetic field sensing. In an optical waveguide geometry, these materials exhibit large values of saturation Faraday rotation which in turn produce high sensitivity. The domain structure of these films favors magnetization rotation as the primary magnetization process. This process is significantly faster than domain wall motion, which is the primary magnetization process in bulk iron garnet crystals. We present data which confirm the high sensitivity and wideband frequency response of these materials. One film exhibits a virtually flat frequency response from de to at least 1 GHz. Potential problems with waveguide sensors, such as birefringence and optical coupling efficiency, appear to be soluble.

引用

页码：3402 / 3404

页数：3

共 6 条

[1]

Day G. W., 1988, PROC SPIE, V985, P138

[2] INTEGRATION OF A FARADAY ROTATOR AND A MODE SELECTOR FOR A MAGNETIC-FIELD SENSOR [J].