DocumentCode :
3098269
Title :
Photonic jets produced by microspheres integrated with hollow-core fibers for ultraprecise laser surgery
Author :
Allen, Kenneth W. ; Kosolapov, A.F. ; Kolyadin, A.N. ; Pryamikov, A.D. ; Mojaverian, Neda ; Limberopoulos, Nicholaos I. ; Astratov, Vasily N.
Author_Institution :
Dept. of Phys. & Opt. Sci., Univ. of North Carolina at Charlotte, Charlotte, NC, USA
fYear :
2013
fDate :
23-27 June 2013
Firstpage :
1
Lastpage :
4
Abstract :
Recently it was proposed to use sharply focused optical beams produced by dielectric microspheres, also termed “photonic nanojets”, in contact laser surgery applications. The proposed designs were based on using multimodal beams and suffered from limited efficiency. In this work we developed single-mode designs of such devices providing higher efficiency and significantly smaller focal spot sizes compared to multimodal systems. The proposed single-mode systems include: i) diode-pumped Er:YAG laser source operating at the wavelength corresponding to the maximal water absorption peak in the tissue (λ = 2.94 μm), ii) low-loss hollow-core microstructured fiber delivery, and iii) high-index (n~1.8) focusing barium-titanate glass microsphere integrated with the fiber. By testing the system in air we demonstrated the focal spot diameters to be less than 4λ. Our numerical modeling shows a principal possibility to achieve diffraction-limited spot sizes on the order of λ/2. Due to the fact that the location of the photonic jet at the sphere surface is not strongly affected by the presence of fluid such systems can find applications in ultraprecise contact intraocular, brain or cellular microsurgeries.
Keywords :
brain; cellular biophysics; jets; laser applications in medicine; numerical analysis; optical fibres; surgery; brain; cellular microsurgery; contact laser surgery; dielectric microsphere; diffraction-limited spot size; diode-pumped laser source; focused optical beams; high-index focusing barium-titanate glass microsphere; hollow-core fibers; low-loss hollow-core microstructured fiber delivery; microspheres; numerical modeling; photonic nanojets; ultraprecise contact intraocular; ultraprecise laser surgery; Focusing; Laser beams; Measurement by laser beam; Optical fibers; Photonics; Propagation losses; Surgery; Er:YAG laser; hollow-core fibers; laser tissue surgery; light focusing; microsphere; photonic nanojet;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Transparent Optical Networks (ICTON), 2013 15th International Conference on
Conference_Location :
Cartagena
ISSN :
2161-2056
Type :
conf
DOI :
10.1109/ICTON.2013.6602908
Filename :
6602908
Link To Document :
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