Abstract
Techniques for coating hollow glass fibers with layers of silver and cyclic olefin polymer have been developed for low-loss delivery of infrared laser light as well as a visible pilot beam. They have yielded losses of only 0.2 dB/m for Er:YAG and CO2 laser light and only 0.7 dB/m for red LD laser light. Debris is kept from entering the hollow output end of a fiber by hermitically sealing it with a quartz cap, and various focusing effects in both air and water have been obtained by controlling distal-end geometry of the caps during fabrication. Controlled focus patterns of Er:YAG laser light with an output energy of more than 400 mJ and a 10-Hz repetition rate have been delivered in saline through the fibers with sealing caps. Calculi were fragmented in vitro by using a hollow fiber with a sealing cap. It has been shown that Er:YAG laser combined with an effective delivery system could be used for minimally invasive calculi fragmentation.
| Original language | English |
|---|---|
| Pages (from-to) | 298-306 |
| Number of pages | 9 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 5449 |
| DOIs | |
| State | Published - 2004 |
| Event | Laser and Laser Information Technologies - Smolyan, Bulgaria Duration: 2003/09/27 → 2003/10/01 |
Keywords
- Calculus fragmentation
- Cyclic olefin polymer
- End-sealing
- Hollow fiber
- Infrared lasers
- Pilot beams
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering