Tapered Optical Fiber Couplers Fabricated by Droplet-based Chemical Etching

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This paper presents a fabrication method for 2 x 2 twisted fiber-optic directional couplers based on biconical low-loss tapered optical fibers using a two-step wet-etching technique with hydrofluoric acid-based droplets and surface tension-driven flows. The droplet-based wet etching of optical fibers allows us simple and cost-effective fabrication of tapered fibers and multiports directional couplers. The simulation results agree well with the experimental observations on the propagation losses, which can be monitored in real-time by measuring the transmitted optical powers during the chemical etching process. The fabricated 2 x 2 fiber-optic directional coupler shows wavelength-insensitive operation within the telecommunication C-band with an excess insertion loss of less than 0.5 dB.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2017-10
Language
English
Article Type
Article
Keywords

HYDROFLUORIC-ACID; MICROFIBER COUPLER; REFRACTIVE-INDEX; WAVELENGTH; SENSOR; WATER

Citation

IEEE PHOTONICS JOURNAL, v.9, no.5

ISSN
1943-0655
DOI
10.1109/JPHOT.2017.2738661
URI
http://hdl.handle.net/10203/226279
Appears in Collection
EE-Journal Papers(저널논문)
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