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Nonlinear side effects of fs pulses inside corneal tissue during photodisruption |
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| Authors: | A Heisterkamp T Ripken T Mamom W Drommer H Welling W Ertmer H Lubatschowski |
| Institution: | Laser Zentrum Hannover e.V., Hollerithallee 8, 30419 Hannover, Germany, DE Institut für Pathologie, Tier?rztliche Hochschule Hannover, Bünteweg 17, 30559 Hannover, Germany, DE Institut für Quantenoptik, Universit?t Hannover, Welfengarten 1, 30167 Hannover, Germany, DE |
| Abstract: | In order to evaluate the potential for refractive surgery, fs laser pulses of 150-fs pulse duration were used to process corneal tissue of dead and living animal eyes. By focusing the laser radiation down to spot sizes of several microns, very precise cuts could be achieved inside the treated cornea, accompanied with minimum collateral damage to the tissue by thermal or mechanical effects. During histo-pathological analysis by light and transmission electron microscopy considerable side effects of fs photodisruption were found. Due to the high intensities at the focal region several nonlinear effects occurred. Self-focusing, photodissociation, UV-light production were observed, leading to streak formation inside the cornea. Received: 12 October 2001 / Revised version: 13 February 2002 / Published online: 14 March 2002 |
| Keywords: | PACS: 42 62 Be 42 65Re 87 80 Rb |
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