第19卷第1期 2011年1月
文章编号
1004-924X(2011)01-0001-09
光学精密工程
Optics and Precision Engineering
Vol, 19No,1
Jan,2011
双芯光纤马赫-曾德尔干涉仪的温度特性
范林勇，江微微，赵瑞峰，裴丽，简水生
（北京交通大学光波技术研究所全光网络与现代通信网教育部重点实验室，北京100044）
摘要：对适用于温度传感的双芯光纤马赫-曾德尔于涉仪进行了研究，并通过将一根单模双芯光纤熔接在两根单模光纤之间，制得了双芯光纤马赫-曾德尔干涉仪型梳状滤波器。用干涉原理分别分析了该器件传输谱的自由空间谱宽与波长、双芯光纤的长度和两纤芯间的有效折射率差的关系，实验检测了它的温度特性。结果显示，随着温度的升高，该器件的传输谱发生红移。在相同温差下，不同波长处的波长漂移值不同，短波长处波长漂移较小，长波长处波长漂移较大。在固定波长处，该器件的传输谱的波长漂移实验数据与温度变化具有较好的二次曲线关系，该器件的温度灵敏度和波长有关，不同波长处灵敏度不同；固定波长处，灵敏度与温度成正比。另外，通过对单模光纤与双芯光纤熔接处的拉锥处理，可以有效降低所制器件的插人损耗。实验制得了插入损耗约为7dB的梳状滤波器，其体积小、制作容易、与光纤系统具有良好的匹配性，可应用于光纤温度传感。
关键词：温度传感；光轩传感；马赫-曾德尔干涉仅；双芯光虾；梳状滤波器
中图分类号：TN253
文献标识码：A
doi;10,3788/OPE,20111901,0001
Temperaturecharacteristicofin-fiberMach-Zehnder
interferometerusingtwin-corefiber
FAN Lin-yong,JIANGWei-wei,ZHAORui-feng,PEI Li,JIAN Shui-sheng(KeyLaboratoryofAllOpticalNetwork&AduancedTelecommunication Netuwork of theMinistry of Education,Instituteof Lightwave Technology,
BeijingJiaotongUniversity,Beijing100044,China)
Abstract: A Mach-Zehnder interferometer using a Twin-core Fiber(TCF) was researched for tempera-ture sensing and a comb-filter based on the in-fiber Mach-Zehnder Interferometer (MZI) was fabrica-ted by splicing a section of single mode TCF between two single mode fibers (SMFs). The Free Spec tral Range(FSR) of the transmission spectrum for the device versa the wavelength, the length of TCF and the effective index difference between the two cores were analyzed and the temperature character-istic of the device was experimentally tested. The tested results indicate that the transmission spectrum of the device has a red shift and a quadratic curve with the temperature increasing. Under the same temperature difference, the wavelength shifts are different at different wavelengths and the wave length shift at short wavelength is smaller than that at longer wavelength. The sensitivity of the de-
收稿日期：2010-02-03；修订日期：2010-05-24.
989008001006
(No.2008AA01Z215)；国家自然科学基金重点资助项目（No.60837002)