High power Q-switched laser for soft tissue ablation

Details High power Q-switched laser for soft tissue ablation High power Q-switched laser for soft tissue ablation

2007-12-25

2007-12-25

Nguyen, Dung (Department: 2828)

Coherent light generators

Particular beam control device

Q-switch

C372S021000, C372S022000

Reexamination Certificate

active

11056671

ABSTRACT:
The present invention discloses a high power Q-switched, intracavity frequency-doubled laser for laser ablation of soft tissue. Operating a high power Q-switched laser in a frequent on-off mode is highly desirable for laser prostatectomy. Giant first pulse may occur when a Q-switched laser is switched from laser-ready mode to pulse-on mode due to sudden depletion of stored energy in the gain medium. Such a giant first pulse may cause power damage of intracavity optics. Besides, temperature shock induced by sudden onset of a high power pulse train may cause optical damage on surface coating of intracavity optics. The present invention contemplates to suppress these giant first pulses and temperature shocks through pre-lasing and ramping profile of laser parameters. Reliable and frequent on-off operation of a diode-pumped, Q-switched, frequency-doubled Nd:YAG laser is demonstrated for output power up to 100 W.

REFERENCES:
patent: 5312396 (1994-05-01), Feld et al.
patent: 5776175 (1998-07-01), Eckhouse et al.
patent: 5805622 (1998-09-01), Brinkmann
patent: 6009110 (1999-12-01), Wiechmann et al.
patent: 6038241 (2000-03-01), von Elm et al.
patent: 6554824 (2003-04-01), Davenport et al.
patent: 6986764 (2006-01-01), Davenport et al.
Malek et al., “High-Power (KTP/532) Laser Vaporization Porstatectomy: 24 Hours Later”, Urology 51: 254-256, 1998, Elsevier Science Inc.
R.S. Kuntzman et al. “High-Power Potassium Titanyl Phosphate Laser Vaporization Prostatectomy”, Mayo Clin Proc. 73:798-801, 1998.
R.S. Malek et al, “High Power Potassium-Titanyl-Phosphate Laser Vaporization Prostatectomy”, J. of Urology, vol. 163, 1730-1733, 2000.
M. A. Hai et al, “Photoselective Vaporization of the Prostate”, J. of Endorology, vol. 17, (2), 2003.
Walter Koechner “Solid-State Laser Engineering” 5th Edition, Springer-Verlag Berlin Heidelerg New York, 1999.
Anthony E. Siegman “Lasers”, University Science Books, Mill Valley, California, 1986.
“Photoselective Vaporization of the Prostate”,Supplement to Urology Times, vol. 30, Supplement 1, May 2002, 20 pages.
Randall S. Kuntzman et al., “High-Power (60-Watt) Potassium-Titanyl-Phosphate Laser Vaporization Prostatectomy in Living Canines and in Human and Canine Cadavers”,Urology, vol. 49, No. 5, 1997, Elsevier Science Inc., pp. 703-708.
Alfred Vogel et al., “Mechanisms of Pulsed Laser Ablation of biological Tissues”,Chem. Rev., vol. 103, Published on Web Feb. 12, 2003, pp. 577-644.

Affiliated with

Also associated with

Rating

High power Q-switched laser for soft tissue ablation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High power Q-switched laser for soft tissue ablation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High power Q-switched laser for soft tissue ablation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3847436