微纳光纤光栅由于其非常强的倏逝场，在生化传感、可调谐光子器件等领域有着巨大的应用潜力。但是，基于普通单模光纤拉制的微纳光纤光栅写入效率低、光栅强度弱，极大地制约了其应用和发展。针对这一问题，本课题组首次提出利用多模光纤拉制微纳光纤并在其上刻写光纤光栅，有效地提高了光栅耦合系数，1分钟的曝光时间即可获得反射率近15dB的mFBG。在此基础上，进一步实现了温度补偿的折射率传感器、免标记DNA传感器、以及基于声致折射率变化的超声波传感器。
高效率微纳光纤光栅增长过程
光栅耦合系数增强机制
温度补偿折射率传感
相关论文：
1. Bai-Ou Guan*, Jie Li, Long Jin, Yang Ran.
'Fiber Bragg gratings in optical microfibers,'
Optical Fiber Technology，vol. 19, no.6, pp.793-801, 2013. (Invited paper)
2. Yang Ran, Long Jin, Yan-Nan Tan, Li-Peng Sun, Jie Li, Bai-Ou Guan*,
IEEE Photonics Journal, vol. 4, no. 1, pp. 181-186, 2012.
3. Yang Ran, Long Jin, Li-Peng Sun, Jie Li, and Bai-Ou Guan*,
'Bragg gratings in rectangular microfiber for temperature independent refractive index sensing,'
Optics Letters, vol. 37, no. 13, pp. 2649-2651, 2012.
4. Yang Ran, Long Jin, Li-Peng Sun, Jie Li, Bai-Ou Guan*,
'Temperature compensated refractive index sensing using a single Bragg grating in an abrupt fiber taper,'
IEEE Photonics Journal, vol. 5, no. 2, p. 7100208, 2013.
5. Yang Ran, Yan-Nan Tan, Li-Peng Sun, Shuai Gao, Jie Li, Long Jin, Bai-Ou Guan*,
'193nm excimer laser inscribed bragg gratings in microfibers for refractive index sensing,'
Optics Express, vol. 19, no. 19, pp. 18577-18583,2011.
6. Jie, Li ; Xiang, Shen ; Li-Peng, Sun, Bai-Ou Guan*,
'Characteristics of microfiber Fabry-Perot resonators fabricated by UV exposure,'
Optics Express, vol. 21, no.10, pp. 12111-12121, May 20. 2013.
7. Xiuxin Wang,Long Jin,Jie Li,Yang Ran,Bai-Ou Guan,
“Microfiber interferometric acoustic transducers,”
Optics Express, vol. 22, no.7, pp. 8126-8135, 2014.
