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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Allen, K.W. Kosolapov, A.F. Kolyadin, A.N. Pryamikov, A.D. Mojaverian, N. Limberopoulos, N.I. Astratov, V.N. |
| Copyright Year | 2013 |
| Description | Author affiliation: Dept. of Phys. & Opt. Sci., Univ. of North Carolina at Charlotte, Charlotte, NC, USA (Allen, K.W.; Astratov, V.N.) || Sensors Directorate, Air Force Res. Lab., Wright-Patterson AFB, OH, USA (Mojaverian, N.; Limberopoulos, N.I.) || Fiber Opt. Res. Center, Moscow, Russia (Kosolapov, A.F.; Kolyadin, A.N.; Pryamikov, A.D.) |
| 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. |
| Starting Page | 1 |
| Ending Page | 4 |
| File Size | 954977 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781479906833 |
| ISSN | 21612064 |
| DOI | 10.1109/ICTON.2013.6602908 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-06-23 |
| Publisher Place | Spain |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Laser beams Measurement by laser beam Photonics Surgery Propagation losses Optical fibers Focusing photonic nanojet laser tissue surgery Er:YAG laser hollow-core fibers microsphere light focusing |
| Content Type | Text |
| Resource Type | Article |
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