Positive Light, Inc.

Coherent, Inc.

William Eugene White

Jeremy Weston

Frank Godwin Patterson

Leigh John Bromley

William Michael Tulloch

Alan Reilly Fry

Sergei V Govorkov

Luis A Spinelli

Murray Keith Reed

Eric Alan Wilson

An efficient, powerful and reliable system for amplifying optical pulses. Seed-pulses are generated by a seed-pulse source and are transmitted to an optical amplifier for amplification. The power for the amplification is provided by a Q-switched, diode-pumped, intracavity-doubled pump laser.

System and method for amplifying an optical pulse and pumping laser therefor

An optical pulse extender includes a delay loop formed by a plurality of mirrors and a graded reflectivity beamsplitter. The mirrors and the beamsplitter are configured and aligned such that a pulse to be broadened makes a predetermined number of round trips in the delay loop and is incident on a different zone of the beamsplitter after each round trip. The different zones of the beamsplitter have different reflection values and different transmission values. These values are selected such that the pulse extender delivers a plurality of temporally and spatially separated replica pulses each thereof having about the same energy. The delivered replica pulses together provide an extended pulse having a longer duration than the input pulse. The replica pulses may be passed through a beam homogenizer to spatially homogenize the temporal characteristics of the extended pulse.

Optical pulse duration extender

Infrared laser light generated by a solid state diode pumped transform-limited Ti:Sapphire laser is converted to UV wavelengths using third and fourth harmonic generation systems. The resulting output is tunable between approximately 187 and 333 nm. The combined solid state Ti:Sapphire laser and harmonic generation system includes feedback mechanisms for improved power and wavelength stability. The system can operate at pulse repetition rates of several thousand Hertz.

Solid state system and method for generating ultraviolet light

System and method for laser micro-machining of crystalline and polycrystalline materials such as silicon that produces smooth surfaces. The invention is applied to integrated circuit applications including probing or modification of circuit components, electrical connections through silicon substrates, establishing ground plains within integrated circuits, and connections between circuits developed on opposing sides of a single substrate. Methods involve the use of femtosecond light pulses of short wavelength and circular polarization. A specific fluence region is used to obtain machined surfaces with smoothness to within one micron.

System and method for laser micro-machining

An efficient, powerful and reliable system for amplifying optical pulses. Seed-pulses are generated by a seed-pulse source and are transmitted to an optical amplifier for amplification. The power for the amplification is provided by a Q-switched, diode-pumped, extracavity frequency-doubled pump laser.

System and method for amplifying an optical pulse using a diode-pumped,

System and method for amplifying an optical pulse and pumping laser

System for amplifying an optical pulse using a diode-pumped, Q-switched,

A dispersive laser pulse stretcher and compressor comprises a stretcher portion and a compressor portion. A first mirror, a second mirror, a third mirror, a first grating, a first lens, and a first vertical retroreflector block comprise the stretcher portion. A fourth mirror, a second grating, a horizontal retroreflector, and a second vertical retroreflector block preferably comprise the compressor portion. The input beams for the stretcher and compressor are preferably parallel beams. The present invention also positions the first grating of the stretcher in a parallel plane with the second grating of the compressor. The present invention also includes a method for simultaneously aligning the input angles of the stretcher and compressor, the method comprises the steps of: removing the first and second diffraction gratings; aligning the input beam for the stretcher portion; aligning the input beam for the compressor portion; mounting the first and second gratings on a mounting block in parallel planes, and rotating the mounting block until the proper input angle for the laser wavelength is reached.

Growing community of inventors

Campbell, CA, United States of America

William Eugene White