We review the research on specialty fiber couplers with emphasis placed on the characteristics that make them attractive for biomedical imaging, optical communications, and sensing applications. The fabrication of fiber couplers has been carried out with, in addition to conventional single mode fiber, various specialty fibers such as photonic crystal fiber, double clad fiber, and hole-assisted fiber with a Ge-doped core. For the fiber coupler fabrication, the side polishing and the fused biconical tapered methods have been developed. These specialty fiber couplers have been applied to optical coherence tomography, fluorescence spectroscopy, fiber sensors, and optical communication systems. This review aims to provide a detailed statement on the recent progress and novel applications of specialty fiber couplers.
© 2010 Optical Society of Korea
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.2350) Fiber optics and optical communications : Fiber optics imaging
(110.4500) Imaging systems : Optical coherence tomography
Original Manuscript: October 15, 2010
Revised Manuscript: November 19, 2010
Manuscript Accepted: November 19, 2010
Published: December 25, 2010
Byeong-Ha Lee, Joo-Beom Eom, Kwan-Seob Park, Seong-Jun Park, and Myeong-Jin Ju, "Specialty Fiber Coupler: Fabrications and Applications," J. Opt. Soc. Korea 14, 326-332 (2010)
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