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Photonic nanojet focusing for hollow-core photonic crystal fiber probes |
Applied Optics, Vol. 51, Issue 36, pp. 8637-8640 (2012)
http://dx.doi.org/10.1364/AO.51.008637
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Abstract
Large-pitch kagome-lattice hollow-core photonic crystal fibers (HC-PCFs) offer appealing optical properties for beam delivery and remote sensing. However, focusing their optical mode on a submicrometer spot can be challenging due to the large mode diameter and low numerical aperture of these fibers. Here, we demonstrate that a 30 μm latex microsphere directly set at the HC-PCF end-face provides an efficient means to focus the fiber mode down to a spot of 540 nm full width at half-maximum thanks to a photonic nanojet effect. The system is used for fluorescence imaging and direct laser writing on a thin absorbing layer. Potential applications include inspection of semiconductor wafers, photolithography, laser surgery, fluorescence sensing, or optical transfection.
© 2012 Optical Society of America
OCIS Codes
(120.4820) Instrumentation, measurement, and metrology : Optical systems
(170.2150) Medical optics and biotechnology : Endoscopic imaging
(180.2520) Microscopy : Fluorescence microscopy
(230.3990) Optical devices : Micro-optical devices
(060.5295) Fiber optics and optical communications : Photonic crystal fibers
ToC Category:
Fiber Optics and Optical Communications
History
Original Manuscript: October 18, 2012
Revised Manuscript: November 15, 2012
Manuscript Accepted: November 17, 2012
Published: December 17, 2012
Virtual Issues
Vol. 8, Iss. 1 Virtual Journal for Biomedical Optics
Citation
Petru Ghenuche, Hervé Rigneault, and Jérôme Wenger, "Photonic nanojet focusing for hollow-core photonic crystal fiber probes," Appl. Opt. 51, 8637-8640 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-51-36-8637
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