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Proceedings Paper

Red and infrared gas laser beam for therapy
Author(s): Mihail-Lucian Pascu; Marin Ristici; E. Ristici; Madalina-Elena Tivarus
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Paper Abstract

For the low power laser therapy, the experiments show that better results are obtained when the laser beam is an overlapping of two radiations: one in the visible region of the spectrum and the other in IR region. Also, some experiments show that for good results in biostimulation it is important to have a high coherence length of laser beam; this is not the case of the laser diodes The He-Ne laser has the best coherence, being able to generate laser radiations in visible and IR. It has tow strong laser lines: 633 nm and 1.15 micrometers . Although their gains are about the same, the available power of the red radiation is 3-4 times higher because of its larger width, when they oscillate separately. Using special dichroic mirrors for simultaneous reflection of the both liens, the laser beam will consist of the two radiations, each of them having good coherence . A 420 mm active length, 1.8 mm inner diameter He-Ne laser tube and a special designed resonator has been developed. The mirrors reflect both radiations as follows: one reflects 99.9 percent and the other, the output mirror, reflects 98 percent. There is a competition between them because these lines have a common lower level. The output power of the laser beam as 6 mW for 633 nm and 4 mW for 1.15 micrometers , respectively.

Paper Details

Date Published: 28 June 2000
PDF: 8 pages
Proc. SPIE 4166, Laser Florence '99: A Window on the Laser Medicine World, (28 June 2000); doi: 10.1117/12.389467
Show Author Affiliations
Mihail-Lucian Pascu, National Institute for Laser, Plasma and Radiation Physics (Romania)
Marin Ristici, National Institute for Laser, Plasma and Radiation Physics (Romania)
E. Ristici, National Institute for Laser, Plasma and Radiation Physics (Romania)
Madalina-Elena Tivarus, National Institute for Laser, Plasma and Radiation Physics (Romania)


Published in SPIE Proceedings Vol. 4166:
Laser Florence '99: A Window on the Laser Medicine World
Leonardo Longo; Alfons G. Hofstetter; Mihail-Lucian Pascu; Wilhelm R.A. Waidelich, Editor(s)

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