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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 23 — Dec. 1, 2013
  • pp: 4935–4938

Focusing and imaging with increased numerical apertures through multimode fibers with micro-fabricated optics

S. Bianchi, V. P. Rajamanickam, L. Ferrara, E. Di Fabrizio, C. Liberale, and R. Di Leonardo  »View Author Affiliations


Optics Letters, Vol. 38, Issue 23, pp. 4935-4938 (2013)
http://dx.doi.org/10.1364/OL.38.004935


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Abstract

The use of individual multimode optical fibers in endoscopy applications has the potential to provide highly miniaturized and noninvasive probes for microscopy and optical micromanipulation. A few different strategies have been proposed recently, but they all suffer from intrinsically low resolution related to the low numerical aperture of multimode fibers. Here, we show that two-photon polymerization allows for direct fabrication of micro-optics components on the fiber end, resulting in an increase of the numerical aperture to a value that is close to 1. Coupling light into the fiber through a spatial light modulator, we were able to optically scan a submicrometer spot (300 nm FWHM) over an extended region, facing the opposite fiber end. Fluorescence imaging with improved resolution is also demonstrated.

© 2013 Optical Society of America

OCIS Codes
(110.2350) Imaging systems : Fiber optics imaging
(220.4000) Optical design and fabrication : Microstructure fabrication
(350.3950) Other areas of optics : Micro-optics
(090.1995) Holography : Digital holography

ToC Category:
Holography

History
Original Manuscript: July 18, 2013
Revised Manuscript: September 25, 2013
Manuscript Accepted: October 10, 2013
Published: November 18, 2013

Citation
S. Bianchi, V. P. Rajamanickam, L. Ferrara, E. Di Fabrizio, C. Liberale, and R. Di Leonardo, "Focusing and imaging with increased numerical apertures through multimode fibers with micro-fabricated optics," Opt. Lett. 38, 4935-4938 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-23-4935


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