Laser medical device

Details Laser medical device Laser medical device

1994-09-27

1999-06-08

Flanagan, Beverly M.

Surgery

Instruments

Light application

A61N 502, H03F 700

Patent

active

059101407

ABSTRACT:
The laser medical device includes a Nd:YAlO.sub.3 laser crystal; a pumping system which illuminates the laser crystal with light irradiated from a pumping light source and achieves population inversion of Nd.sup.3+ ion in the laser crystal; and a resonant cavity for resonating light emitted from the Nd.sup.3+ ion to output a laser light having a predetermined wavelength, wherein the wavelength of the laser light falls within the transparent range of quartz optical fibers. The laser medical device may also include a quartz optical fiber for transmitting the laser light; an optical fiber injector for focusing the laser light output by the resonant cavity on one end of the optical fiber; and an optical fiber pen which is coupled to another end of the optical fiber for aiming the laser light transmitted through the optical fiber at a desired location of a subject. These devices use Nd:YAlO.sub.3 crystal as an active laser material and output laser light having a wavelength, such as 1341.4 nm and 1079.5 nm, within the transparent range of the quartz optical fiber. In such a band, Nd:YAlO.sub.3 laser crystal has good performance characteristics for becoming a high power CW laser or a large energy pulsed laser. Therefore, Nd:YAlO.sub.3 crystal can be used to develop laser medical devices having good clinical effects that are convenient for therapy such as for endoscopic operations.

REFERENCES:
patent: 4165469 (1979-08-01), Ammann
patent: 5036520 (1991-07-01), Bowman et al.
patent: 5150704 (1992-09-01), Tatebayashi et al.
patent: 5181214 (1993-01-01), Berger et al.
patent: 5312396 (1994-05-01), Feld et al.
patent: 5336217 (1994-08-01), Bugs et al.
"YA10.sub.3 Doping TR.sup.3+ Ions as Medium of Laser" by H.S. Bagdasarov et al, Letters of JETP, vol. 9, P501-502, Mar. 5, 1969.
M. J. Weber et al, Czochraski growth and properties of YA10, laser crystals, Appl. Phys. Lett., vol. 15, p342(1969).
X. C. Bagdacarov et al, "YA10.sub.3 doping TR.sup.3+ ions as active medium of laser", Pis'ma, ZH. Ehksp. Tear. Fiz., vol. 9, No. 9, p501(1969).
G. A. Mass et al, "High average power operation and nonlinear optical generation with the Nd:YA10.sub.3 laser", Appl. Phys. Lett., vol. 18, No. 2, p576(1971).
A. A. Kaminskii et al, "Anisotropy of spectroscopic characteristics in the biaxial YA10.sub.3 -Nd.sup.3+ laser crystals", Phys. Stat. Sol. (a)51, p509(1979).
H. Y. Shen, Thermal effects in orthorhombic YAP crystals, Acta Physica Sinica, vol. 30, No. 8, p1085(1981).
H. Y. Shen et al, "Influence of thermal effects on high power CW laser output of b-axis Nd:YAP", Chinese Physics, vol. 3, No. 1, p45(1983).
H. Y. Shen et al, "A high power 1079.5nm Nd:YA10.sub.3 CW laser", Chinese Journal of Lasers, vol. 19, No. 1, p19(1992).
H. Y. Shen et al, "Measurement of the stimulated emission cross section for .sup.4 F.sub.3/2 -.sup.4 I.sub.13/2 transition of Nd.sup.3+ ion in YA10.sub.3 crystal", IEEEJ Quantum Electron, vol. 25, No. 2, p144(1989).
Y. P. Zhou et al, "A method for calculating optomechanical coefficient of laser materials", Chinese Journal of Lasers, Special Issue on Laser Devices, vol. 17, p138(1990).
H. Y. Shen et al, "Laser action of Nd:YA10.sub.3 at 1300nm", Journal of Applied Physics, vol. 70, No. 6, p3373(1991).
H. Y. Shen et al, "Large Energy 1341.4nm Nd:YA10.sub.3 pulse laser", Opt. and Laser Technology, vol. 23, No. 6, p366(1991).

Affiliated with

Also associated with

Rating

Laser medical device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Laser medical device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser medical device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1681220