基于亚毫米尺度波导研究磁流体的窄带滤波特性

袁文; 桑明煌; 郭琴; 况庆强

doi:10.3788/OPE.20111911.2618

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基于亚毫米尺度波导研究磁流体的窄带滤波特性

微纳技术与精密机械 | 更新时间：2020-08-12

- 基于亚毫米尺度波导研究磁流体的窄带滤波特性
- Research on narrow band filter of magnetic fluid based on optical waveguide with submillimeter scale
- 光学精密工程 2011年19卷第11期页码：2618-2622
- 作者机构：
  
  江西师范大学物理与通信电子学院,江西南昌,330022
- 作者简介：
- 基金信息：
  
  江西省自然科学基金资助项目(No.2009GZW0006)();上海交通大学区域光纤通信网与新型光通信系统国家重点实验室开放项目(No.2008SH05)();江西师范
- DOI：10.3788/OPE.20111911.2618
  中图分类号： TN253
- 收稿日期：2011-05-23，
  
  修回日期：2011-07-08，
  
  网络出版日期：2011-11-25，
  
  纸质出版日期：2011-11-25
- 稿件说明：
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袁文, 桑明煌, 郭琴, 况庆强. 基于亚毫米尺度波导研究磁流体的窄带滤波特性[J]. 光学精密工程, 2011,19(11): 2618-2622

YUAN Wen, SANG Ming-huang, GUO Qin, KUANG Qing-qiang. Research on narrow band filter of magnetic fluid based on optical waveguide with submillimeter scale[J]. Editorial Office of Optics and Precision Engineering, 2011,19(11): 2618-2622
袁文, 桑明煌, 郭琴, 况庆强. 基于亚毫米尺度波导研究磁流体的窄带滤波特性[J]. 光学精密工程, 2011,19(11): 2618-2622 DOI： 10.3788/OPE.20111911.2618.

YUAN Wen, SANG Ming-huang, GUO Qin, KUANG Qing-qiang. Research on narrow band filter of magnetic fluid based on optical waveguide with submillimeter scale[J]. Editorial Office of Optics and Precision Engineering, 2011,19(11): 2618-2622 DOI： 10.3788/OPE.20111911.2618.

摘要

利用一种样品空间层达亚毫米尺度的双面金属波导

将磁流体注入波导样品空间层作为导波层来研究磁流体的窄带滤波特性。首先将波长为1 550 nm的激光入射到波导表面

选择合适的入射光导模共振角

激发波导中的超高阶导模

使磁流体处于光波导的振荡场中;然后

应用超高阶导模的高灵敏度特点

将磁场施加在波导上改变磁流体的折射率

使波导耦合效率发生变化

通过接收波导反射光

得到波导的窄带滤波特性。实验中测试的入射光波长调谐在1 549.440~1 549.585 nm

窄带滤波带宽为0.06 nm。当波长为1 549.516 nm

所加磁场为0~51.9 kA/m时

获得反射光的变化达到11.9 dB。实验结果表明

该方法获得的滤波特性具有带宽窄、灵敏度高的特点。

Abstract

A type of ultrathick double metal cladding optical waveguide with a submillimeter scale was used to investigate the narrow bandwidth filter of magnetic fluid

in which the magnetic fluid were injected into the sample as a guided layer. While the 1 550 nm laser beam was incident on the waveguide with resonance angle

ultrahigh order modes would be excited; the magnetic fluid was in the oscillating field. Then based on ultrahigh order modes

the refractive index of magnetic fluid was changed owing to the strong concentration of the magnetic field. The characteristics of narrow bandwidth filter were obtained by detecting the reflected beam on waveguide. In the experiment

the wavelength of the incidence beam was to be form 1 549.440 nm to 1 549.585 nm

and the bandwidth filter to be 0.06 nm. Obtained results show that the change of reflected beam is 11.9 dB when the magnetic field changed from 0 to 51.9 kA/m in the wavelength of 1 549.516 nm. Experimental results indicate that the optical filter has narrow waveband and higher sensitivity.

关键词

Keywords

references

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