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:
Jun. 28, 2011
Filed:
Feb. 23, 2005
Michael Mason, Redhill, GB;
Duncan Parsons-karavassilis, London, GB;
Nicolas Hay, East Grinstead, GB;
Matthew Kelly, London, GB;
Andrew Comley, Newbury, GB;
Burly Cumberland, London, GB;
Michael Poulter, Waterlooville, GB;
Michael Mason, Redhill, GB;
Duncan Parsons-Karavassilis, London, GB;
Nicolas Hay, East Grinstead, GB;
Matthew Kelly, London, GB;
Andrew Comley, Newbury, GB;
Burly Cumberland, London, GB;
Michael Poulter, Waterlooville, GB;
Powerlase Ltd., , GB;
Abstract
In a first embodiment, the invention makes use of a Neodymium doped YAG (Nd:YAG) gain medium placed in an optical resonant cavity formed by two mirrors. Power extraction is maximized for a specific laser cavity. In particular the concave curvature on the rod ends contributes a negative lensing component to modify the strength of the thermal lens. In a second embodiment the present invention uses an amplifier rod medium with curved ends to act as lensing elements to collect emission from the laser gain medium and/or oscillator described in the first embodiment of the invention. The combination of thermal lens and curved rod ends produces a lensing effect which allows light to be directly coupled from a laser. In addition, variation of the input pump power allows for control of the thermal lens formed within the amplifier rod.