The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 27, 2001
Filed:
Dec. 12, 1997
Kevin Connors, Palo Alto, CA (US);
Greg Spooner, San Francisco, CA (US);
Ralph Saunders, San Ramon, CA (US);
Coherent, Inc., Santa Clara, CA (US);
Abstract
An Er:YAG laser system has a resonant cavity including an Er:YAG rod pulse-pumped by a pulsed flashlamp. The pump-pulse repetition rate and average power is selected to provide a known essentially constant thermal-lensing power in the Er:YAG rod. Design parameters of the Er:YAG rod and the resonant cavity are selected to compensate for this thermal-lensing power. A shutter in the resonant cavity, when closed or open, respectively prevents or allows a laser output-pulse to be generated in response to a pump-pulse. Laser output-pulse duration is continuously variable and is controlled by controlling the duration of flashlamp-pulses. A sequence of laser output-pulses is controlled by opening and closing the shutter. This arrangement has the advantage that the laser output-pulse repetition rate can be selected to be the flashlamp-pulse repetition rate or some sub-multiple thereof while maintaining thermal-lensing power in the rod essentially constant and compensated for.