University of California

Deanna M Pennington

Stephen Anthony Payne

Jay Walter Dawson

Raymond John Beach

Michael Dale Perry

Alexander D Drobshoff

James M Brase

Charles A Thompson

Wolfgang Hackenberg

Michael W Kartz

Domenico Bonaccini Calia

Luke Taylor

Zhi Ming Liao

An optical fiber amplifier includes a length of silica optical fiber having a core doped with neodymium, a first cladding and a second cladding each with succeeding lower refractive indices, where the first cladding diameter is less than 10 times the diameter of the core. The doping concentration of the neodymium is chosen so that the small signal absorption for 816 nm light traveling within the core is less than 15 dB/m above the other fiber losses. The amplifier is optically pumped with one laser into the fiber core and with another laser into the first cladding.

High power 938 nanometer fiber laser and amplifier

A system for laser machining includes a laser source for propagating a laser beam toward a target location, and a spatial light modulator having individual controllable elements capable of modifying a phase profile of the laser beam to produce a corresponding irradiance pattern on the target location. The system also includes a controller operably connected to the spatial light modulator for controlling the individual controllable elements. By controlling the individual controllable elements, the phase profile of the laser beam may be modified into a desired phase profile so as to produce a corresponding desired irradiance pattern on the target location capable of performing a machining operation on the target location.

Programmable phase plate for tool modification in laser machining applications

Growing community of inventors

Livermore, CA, United States of America

Deanna M Pennington