| 基于光纤光栅的温度不敏感光学麦克风 |
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| 引用本文： | 刘群.基于光纤光栅的温度不敏感光学麦克风[J].光电子．激光,2010(3):415-419. |
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| 作者姓名： | 刘群 |
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| 作者单位： | 天津大学精密仪器与光电子工程学院; |
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| 基金项目： | 国家自然科学基金面上资助项目(60578054); 天津市重点基金资助项目(08JCZDJC19300) |
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| 摘 要： | 研制了一种基于光纤光栅的温度不敏感型光学麦克风。该麦克风由振膜传感声波信号,由一对匹配光栅来实现波长调制解调的功能,同时匹配光栅还可作为温度补偿的装置。从理论上解释了匹配光栅温度补偿的原理。实验证明,这种光学麦克风不仅能够获得稳定的传声效果,而且表现出较宽的频率响应范围(400~2 100Hz)和平坦程度,并且静态输出光功率随外界温度变化仅为0.0233 dBm/℃,表现出对温度的不敏感性。
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| 关 键 词： | 光纤麦克风 光纤布拉格光栅(FBG) 温度补偿 波长移动 匹配FBG |
A FBG-based temperature insensitive optical microphone |
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| LIU Qun.A FBG-based temperature insensitive optical microphone[J].Journal of Optoelectronics·laser,2010(3):415-419. |
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| Authors: | LIU Qun |
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| Affiliation: | LIU Qun,LI En-bang,ZHENG Dan-ying,TANG Chun-xiao(College of Precision Instrument , Optoelectronics Engineering,Tianjin University,Tianjin 300072,China) |
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| Abstract: | A FBG-based fiber optical microphone which is insensitive with temperature and has a broad frequency band(400-2 100 Hz) is described.The fiber optical microphone is composed of a Broad Band Source(BBS),a pair of matched fiber Breagg Gratings(FBG) and a polyester diaphragm which can vibrate with acoustic waves.The pair of matched FBGs is employed for both wavelength demodulation and temperature compensation.The features make the fiber optical microphone achieve a stable operation,and make the optical microph... |
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| Keywords: | optical fiber microphone fiber Bragg grating temperature insensitivity wavelength drift matched FBGs |
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