High-quality Mach-Zehnder interferometer based on a microcavity in single-multi-single mode fiber structure for refractive index sensing
High-quality Mach-Zehnder interferometer based on a microcavity in single-multi-single mode fiber structure for refractive index sensing
复制标题
基于单多单模光纤结构微腔的高质量马赫-曾德尔干涉仪，用于折射率传感
DOI：
10.1364/ao.56.000847
复制
发表时间：
2017-02-01
期刊：
影响因子：
1.9
通讯作者：
Qu, Shiliang
中科院分区：
文献类型：
--
作者：
Liu, Yi;Wu, Guoqiang;Qu, Shiliang
提出了一种基于单-多单模光纤(SMSF)结构中具有两个对称开口的微腔的光纤马赫-曾德尔干涉仪(MZI)。利用有限差分光束传播法(FD-BPM)对干涉谱进行了模拟，结果表明，即使微腔沿径向偏移3微米，MZI仍能获得高质量的干涉，从而允许较大的加工公差，大大降低了加工难度。在此基础上，利用飞秒激光诱导水击穿的方法，在SMSF中制作了具有两个对称开口的微腔。微腔在水中的插入损耗仅为-8分贝，透射谱中的MZ干涉峰对比度达到30分贝以上。基于微腔结构的微零电流传感器具有高质量的干涉光谱、超高的灵敏度(9756.75 nm/RIU)、高的折射率分辨率(2×10(-5)RIU)、良好的线性度(99.93%)和低温串扰(0.04 nm/℃)，是一种实用的液体折射率传感器。(C)2017年美国光学学会
A fiber inline Mach-Zehnder interferometer (MZI) based on a microcavity with two symmetric openings in single-multi- single mode fiber (SMSF) structure is proposed. By using the finite difference beam propagation method (FD-BPM), the interference spectrum simulation result shows that the MZI can still have high-quality interference even if the microcavity deviates along the radial direction for 3 mu m. Therefore, it allows a larger fabrication tolerance and tremendously decreases the fabrication difficulty. Then a microcavity with two symmetric openings in SMSF was fabricated by using femtosecond laser-induced water breakdown. The insertion loss of the microcavity immerged in water is only -8 dB, and the MZ interference peak contrast in the transmission spectrum reaches more than 30 dB. The MZI based on the microcavity in SMSF can be used as a practical liquid refractive index sensor as its high-quality interference spectrum, ultrahigh sensitivity (9756.75 nm/RIU), high refractive index resolution (2 x 10(-5) RIU), good linearity (99.93%), and low-temperature crosstalk (0.04 nm/degrees C). (C) 2017 Optical Society of America