Gerald B Mitchell

US Patent:

6366593, Apr 2, 2002

Filed:

Dec 1, 1999

Appl. No.:

09/452767

Inventors:

Derek J. Richard - Pleasanton CA
Mark Byer - Mountain View CA
Gerald Mitchell - Los Altos CA
George Conway - San Mateo CA

Assignee:

Lightwave Electronics Corporation - Mountain View CA

International Classification:

H01S 304

US Classification:

372 36, 372 34

Abstract:

A precision positioning mount for UV-cured adhesives that provides adhesive junctions between modular assembly mounts and structural elements. Contact edges are placed on a first fixating area of an adhesive junction. The contact edges are pronounced edges of faces that slide along a second fixating area during the adjustment process. Thus, the assembly modules and structural elements are precisely referenced before, during and after their positioning and orientating. First and second fixating areas form a cavity that provides a volume for the adhesive. The mounts and structural elements are preferably made of sapphire for increased thermal conductivity. The elements of the assembly mounts are modular and interchangeable and provide various positioning modes.

US Patent:

6395000, May 28, 2002

Filed:

Jun 13, 2000

Appl. No.:

09/592324

Inventors:

Gerald M. Mitchell - Los Altos CA
Edward D. Reed - Sunnyvale CA
Greg J. Spooner - Palo Alto CA
Michael Hmelar - Palo Alto CA

Assignee:

Lumenis Inc. - Santa Clara CA

International Classification:

A61B 1818

US Classification:

606 15, 606 16, 606 13

Abstract:

A medical laser system is disclosed for ablating biological material. The system includes an Erbium:YAG gain medium capable of generating a pulsed output having a wavelength of 2. 9 microns. The laser is optimized to generate a pulsed output having a repetition rate of at least 50 hertz and preferably at least 100 hertz. The output is delivered to the target tissue via an optical fiber. Preferably, a suction source is provided to aspirate the tissue as it is being ablated. The erbium laser system provides accurate ablation with minimal damage to surrounding tissue.

US Patent:

7869016, Jan 11, 2011

Filed:

May 19, 2008

Appl. No.:

12/123152

Inventors:

Gerald M. Mitchell - Los Altos CA, US
Douglas G. Stinson - Fremont CA, US
Michael W. Sasnett - Los Altos CA, US
David S. Jebens - Campbell CA, US
Michael R. Hodel - Fremont CA, US

Assignee:

AMS Research Corporation - Minnetonka MN

International Classification:

G01N 21/00
A61B 1/04
A61B 18/18
B23K 26/04
B23K 26/02

US Classification:

356 731, 600108, 606 11, 606 15, 606 16, 21912183, 21912162

Abstract:

A medical laser system and related methods of monitoring optical fibers to determine if an optical fiber cap on the optical fiber is in imminent danger of failure. The laser system includes a photodetector for converting returned light from the optical fiber cap to an electronic signal for comparison to a trigger threshold value known to be indicative imminent fiber cap failure. The returned light can be the main laser treatment wavelength, an auxiliary wavelength such as an aiming beam or infrared wavelengths generated by a temperature of the optical fiber cap. In the event the electronic signal reaches the trigger threshold value, the laser system can be temporarily shut-off or the power output can be reduced.

US Patent:

7995638, Aug 9, 2011

Filed:

Feb 21, 2008

Appl. No.:

12/034756

Inventors:

Gerald Mitchell - Los Altos CA, US

Assignee:

Laserscope - Minnetonka MN

International Classification:

H01S 3/091

US Classification:

372 71, 372 70, 372 41, 372 40, 372 10, 372 21, 372 93

Abstract:

A laser configuration producing up to 100's of Watts of output is provided, based on a solid-state gain medium, a source of pump energy which is detuned from the maximum absorption wavelength for the gain medium, and optics arranged to deliver the pump energy through an end of the gain medium to propagate along the length of the gain medium. The length of the gain medium and the doping concentration in the gain medium are sufficient the absorption length is on the order of 10's of millimeters, and more than ⅓ of the length, and that 90 percent or more of the pump energy is absorbed within two or fewer passes of the gain medium. A pump energy source that supplies 100 Watts to 1000 Watts or more.

US Patent:

20050058165, Mar 17, 2005

Filed:

Sep 12, 2003

Appl. No.:

10/661435

Inventors:

James Morehead - Oakland CA, US
Mark Arbore - Los Altos CA, US
Gerald Mitchell - Los Altos CA, US

Assignee:

Lightwave Electronics Corporation - Mountain View CA

International Classification:

H01S003/14

US Classification:

372039000, 372070000

Abstract:

The use of -oriented crystals as gain media in lasers and optical amplifiers is disclosed. In a laser, a substantially -oriented crystal, such as YAG can be disposed within an optical cavity as a gain medium. The crystal is orientated such that a plane is substantially perpendicular to a direction of beam propagation within the crystal. A pump source provides pumping energy to a pumped region of the crystal. The use of a substantially -oriented crystal can reduce depolarization loss and thermal lens effects if an absorbed power of the pumping energy is less than or equal to about 1000 watts of pumping radiation and/or a cross-sectional overlap between a beam of radiation propagating through the crystal and the pumped region is greater than about 20% of a cross-sectional area of the pumped region.

US Patent:

20070098024, May 3, 2007

Filed:

Oct 28, 2005

Appl. No.:

11/261010

Inventors:

Gerald Mitchell - Los Altos CA, US

Assignee:

Laserscope - San Jose CA

International Classification:

H01S 3/11

US Classification:

372010000

Abstract:

A laser configuration producing up to 100's of Watts of output is provided, based on a solid-state gain medium, a source of pump energy which is detuned from the maximum absorption wavelength for the gain medium, and optics arranged to deliver the pump energy through an end of the gain medium to propagate along the length of the gain medium. The length of the gain medium and the doping concentration in the gain medium are sufficient the absorption length is on the order of 10's of millimeters, and more than ⅓ of the length, and that 90 percent or more of the pump energy is absorbed within two or fewer passes of the gain medium. A pump energy source that supplies 100 Watts to 1000 Watts or more.

US Patent:

20110196355, Aug 11, 2011

Filed:

Apr 22, 2011

Appl. No.:

13/092847

Inventors:

Gerald Mitchell - Los Altos CA, US
Kenneth J. Arnold - Corralitos CA, US

Assignee:

Precise Light Surgical, Inc. - Sunnyvale CA

International Classification:

A61B 18/20

US Classification:

606 11

Abstract:

A laser can produce pulses of light energy to eject a volume of the tissue, and the energy can be delivered to a treatment site through a waveguide, such as a fiber optic waveguide. The incident laser energy can be absorbed within a volume of the target tissue with a tissue penetration depth and pulse direction such that the propagation of the energy from the tissue volume is inhibited and such that the target tissue within the volume reaches the spinodal threshold of decomposition and ejects the volume, for example without substantial damage to tissue adjacent the ejected volume.

US Patent:

20130035676, Feb 7, 2013

Filed:

Apr 22, 2011

Appl. No.:

13/642497

Inventors:

Gerald Mitchell - Los Altos CA, US
Kenneth J. Arnold - Corralitos CA, US

Assignee:

Precise Light Surgical, Inc. - Sunnyvale CA

International Classification:

A61B 18/20
A61B 18/22

US Classification:

606 10, 606 16

Abstract:

A laser can produce pulses of light energy to eject a volume of the tissue, and the energy can be delivered to a treatment site through a waveguide, such as a fiber optic waveguide. The incident laser energy can be absorbed within a volume of the target tissue with a tissue penetration depth and pulse direction such that the propagation of the energy from the tissue volume is inhibited and such that the target tissue within the volume reaches the spinodal threshold of decomposition and ejects the volume, for example without substantial damage to tissue adjacent the ejected volume.