We present an etch method for fabricating low-loss biconical fiber tapers. Surface tension driven flows of hydrofluoric acid etch the fibers to sub-micron diameters. Varying the immersion depth controls the taper cross-section shape and ellipticity.
© 2011 OSA
(220.4610) Optical design and fabrication : Optical fabrication
(230.2285) Optical devices : Fiber devices and optical amplifiers
(220.4241) Optical design and fabrication : Nanostructure fabrication
E. J. Zhang, J. C. Mikkelsen, and J. Poon, "Cross-Sectional Geometry Control of Low-Loss Biconical Fiber Tapers Using Hydrofluoric Acid Flow Etching," in CLEO:2011 - Laser Applications to Photonic Applications, OSA Technical Digest (CD) (Optical Society of America, 2011), paper CME2.
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