Resonance condition of a microfiber knot resonator immersed in liquids

被引：40

作者：

Lim, Kok Sing ^{[1
]}

Jasim, Ali A. ^{[2
]}

Damanhuri, Siti S. A. ^{[2
]}

Harun, Sulaiman W. ^{[1
,2
]}

Rahman, B. M. Azizur ^{[3
]}

Ahmad, Harith ^{[1
]}

机构：

[1] Univ Malaya, Photon Res Ctr, Dept Phys, Kuala Lumpur 50603, Malaysia

[2] Univ Malaya, Dept Elect Engn, Kuala Lumpur 50603, Malaysia

[3] City Univ London, Dept Elect Elect & Informat Engn, London EC1V 0HB, England

来源：

APPLIED OPTICS | 2011年 / 50卷 / 30期

关键词：

LOOP RESONATOR;

D O I：

10.1364/AO.50.005912

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Effects of immersing a microfiber knot resonator (MKR) in liquid solutions that have refractive indices close to that of silica are experimentally demonstrated and theoretically analyzed. Significant improvement in resonance extinction ratio within 2 to 10 dB was observed. To achieve a better understanding, a qualitative analysis of the coupling ratio and round-trip attenuation of the MKR is performed by using a curve-fitting method. It was observed that the coupling coefficient at the knot region increased when immersed in liquids. However, depending on the initial state of the coupling and the quantity of the increment in the coupling coefficient when immersed in a liquid, it is possible that the MKR may experience a deficit in the coupling parameter due to the sinusoidal relationship with the coupling coefficient. (C) 2011 Optical Society of America

引用

页码：5912 / 5916

页数：5

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