Ultraviolet inscription of long period gratings on polymer functionalized optical microfibers

Zhongyang Xu; Yuhang Li; Lijun Wang

doi:10.1117/12.2214851

27 April 2016 Ultraviolet inscription of long period gratings on polymer functionalized optical microfibers

Zhongyang Xu, Yuhang Li, Lijun Wang

Proceedings Volume 9886, Micro-Structured and Specialty Optical Fibres IV; 98860R (2016) https://doi.org/10.1117/12.2214851
Event: SPIE Photonics Europe, 2016, Brussels, Belgium

Abstract

Optical microfibers functionalized with surface microstructures, have attracted great attentions and been widely used in various optical devices. In this work, we demonstrated a technique to fabricate microstructures on polymer coated optical microfibers via ultraviolet inscription. Optical microfibers were firstly functionalized with ultraviolet photosensitivity by surface PMMA jackets. Microstructures were fabricated on optical microfibers via point-by-point ultraviolet inscription since the photo-etching in PMMA jackets. As an illustration, a 2-mm-long microfiber long period grating (MLPG) with a pitch of 80 μm was inscribed. The diameter of optical microfiber is 5.4 μm and a resonant dip of 15dB was observed at 1377 nm. The MLPG showed a high sensitivity of strain and axial force, i.e., -1.93 pm/με and -867 μN/nm. Sealed by a PMMA housing, the temperature sensitivity of MLPG could be enhanced from -12.75 pm/°C to -385.11 pm/°C. This technique demonstrates ultraviolet inscription of MLPGs and also provides an approach to fabricate microstructures on optical microfiber via ultraviolet exposure.

Citation Download Citation

Zhongyang Xu, Yuhang Li, and Lijun Wang "Ultraviolet inscription of long period gratings on polymer functionalized optical microfibers", Proc. SPIE 9886, Micro-Structured and Specialty Optical Fibres IV, 98860R (27 April 2016); https://doi.org/10.1117/12.2214851

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KEYWORDS

Polymethylmethacrylate

Polymers

Temperature metrology

Fabrication

Optical sensing

Single mode fibers

Silica

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