| 157 nm准分子激光制作的光纤珐-珀干涉折射率传感器 |
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| 引用本文： | 张健,饶云江,冉曾令,徐兵. 157 nm准分子激光制作的光纤珐-珀干涉折射率传感器[J]. 光学与光电技术, 2009, 7(4): 19-22 |
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| 作者姓名： | 张健 饶云江 冉曾令 徐兵 |
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| 作者单位： | 电子科技大学宽带光纤传输和通信网技术教育部重点实验室,四川,成都,610054;电子科技大学宽带光纤传输和通信网技术教育部重点实验室,四川,成都,610054;重庆大学光电技术与系统教育部重点实验室,重庆,400044 |
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| 基金项目： | 国家自然科学重点基金 |
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| 摘 要： | 利用157nm激光微加工技术在单模光纤的端面加工一个微槽,用一段光纤将其密封形成一个空气珐-珀腔,这段密封用光纤与两侧的空气界面形成第二个珐-珀腔,传感器干涉条纹由两个珐-珀腔共同作用而成。计算表明,当两珐-珀腔长度接近时,传感器反射光谱的波谷位置会随着外界折射率变化而发生漂移。这种双干涉腔结构提供了一种新的折射率测量方案。实验表明当外界折射率在1．3333～1．4712内变化时,响应为非线性,平均灵敏度为28．21nm／RIU,系统折射率分辨率为3．54×10^-5,与理论计算吻合。
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| 关 键 词： | 光纤光学 光纤珐-珀腔 激光微加工 折射率测量 |
Fiber Fabry-P(e)rot Interferometric Refractive Index Sensor Fabricated by 157 nm Excimer Laser |
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| ZHANG Jian,RAO Yun-jiang,RAN Zeng-ling,XU Bing. Fiber Fabry-P(e)rot Interferometric Refractive Index Sensor Fabricated by 157 nm Excimer Laser[J]. optics&optoelectronic technology, 2009, 7(4): 19-22 |
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| Authors: | ZHANG Jian RAO Yun-jiang RAN Zeng-ling XU Bing |
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| Affiliation: | 1 Key Lab of Broadband Optical Fiber Transmission ＆Communication Networks, University of Electronics Science ＆ Technology of China, Chengdu 610054, China; 2 Key Lab of Opto-Electronic Technology ＆Systems, Chongqing University, Chongqing 400044, China ) |
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| Abstract: | A micro trough is fabricated on the end of a single mode fiber by 157nm laser micro-machining. A section of fiber is applied to seal the trough and a Fabry-Perot （F-P） cavity is generated. The two interfaces between the sealed fiber and the air form the second F-P. Calculation shows that the valley of the reflection spectrum changes with the variation of surrounding refractive index （RI） when the length of the two F-Ps is approximate. This dual interferometer cavities provide a new solution {or RI measurement. Experimental results show an average sensitivity of 28.21 nm/RIU and RI resolution of 3.54× 10 ^-5 tested in the range of 1. 333 3-1. 471 2, agreeing with the theoretical analysis. |
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| Keywords: | fiber optics fiber Fabry Perot laser micro-machining refractive index measurement |
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