Observation of critical coupling in a fiber taper to a silica-microsphere whispering-gallery mode system

被引:782
作者
Cai, M [1 ]
Painter, O [1 ]
Vahala, KJ [1 ]
机构
[1] CALTECH, Dept Appl Phys, Pasadena, CA 91125 USA
关键词
D O I
10.1103/PhysRevLett.85.74
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We present the observation of critical coupling in a high-e fused-silica microsphere whispering-gallery mode resonator coupled to a fiber taper. Extremely efficient and controlled power transfer to high-Q, (10(7)) resonators has been demonstrated. Off-resonance scattering loss was measured to be less than 0.3%. On-resonance extinction in transmitted optical power through the fiber coupler was measured as high as 26 dB at the critical coupling point. This result opens up a range of new applications in fields as diverse as near-field sensing and quantum optics.
引用
收藏
页码:74 / 77
页数:4
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