Hybrid fabricating of silica micro/nanofibers

doi:10.1007/s12200-011-0132-2

Front Optoelec Chin

2011, Vol. 4

Issue (3) : 338-342 https://doi.org/10.1007/s12200-011-0132-2

RESEARCH ARTICLE

Hybrid fabricating of silica micro/nanofibers

Ping ZHAO, Zhao WU, Kaisheng CHEN, Xinliang ZHANG(

)

Wuhan National Laboratory for Optoelectronics, College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

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Abstract

We report a hybrid two-step approach for fabricating silica micro/nanofibers with different diameters (the minimum one down to 180 nm). Due to tapering and etching techniques introduced to this approach, the time is reduced from hundreds of minutes to several minutes to manufacture silica nanofibers by etching and the complexity of tapering mechanical system is brought down, because this approach has the ability to control the micro/nanofiber diameter on a nanometer-scale. Uniform nanofibers with losses as low as 0.05 dB/mm at 1.55 μm wavelength are obtained suggesting the advantage of the hybrid approach to build up micro/nanofiber-based devices, especially in locally changing the structure of micro/nanofiber.

Keywords nano-fabrication micro/nanofiber sub-wavelength-diameter fiber nanophotonics

Corresponding Author(s): ZHANG Xinliang,Email:xlzhang@mail.hust.edu.cn

Issue Date: 05 September 2011

Cite this article:

Ping ZHAO,Zhao WU,Kaisheng CHEN, et al. Hybrid fabricating of silica micro/nanofibers[J]. Front Optoelec Chin, 2011, 4(3): 338-342.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-011-0132-2
https://academic.hep.com.cn/foe/EN/Y2011/V4/I3/338

Fig.1 (a) Whole process of hybrid two-step fabrication, single mode fiber (SMF); (b) Step 1 of drawing silica micro fibers. Optical fiber is fixed on two stages. One stage can be horizontally pulled by a motor. The whole equipment is covered by a plexiglas box to avoid air turbulence; (c) Step 2 of etching procedure. The buffer hydrogen fluoride solution is composed of 45 mL 0.36-w.t. hydrofluoric acid, 20 mg ammonium fluoride and 150 mL deionized water

Fig.2 SEM images of silica MNFs fabricated by hybrid approach. (a) Silica MNF with diameter of 180 nm; (b) silica MNF with diameter of 500 nm; (c) silica MNF with diameter of 770 nm; (d) a part of a 20-mm-long silica nanofiber with a diameter of 900 nm

Fig.3 Correlation of silica MNF diameter () and time () in an etching procedure

Fig.4 (a) Setup for measuring losses of silica MNFs. is optical wavelength and arrow stands for transmission direction; (b) an optical microscope picture of a 920-nm-diameter silica nanofiber supported by a bare optical fiber. Nanofiber guides 628 nm light and transmits it to right end

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