Lumentum Operations LLC

Jds Uniphase Corporation

Amada Holdings Company Ltd.

Other

Nlight, Incorporated

Dahv Kliner

Martin H Muendel

Jeremy Weston

Kai-Chung Hou

Derek A Tucker

Aaron Ludwig Hodges

Loren A Eyres

Lawrence E Myers

Mitchell Ryan Reynolds

Juan Lugo

Some embodiments may include a fiber laser, comprising: a variably wound optical fiber, wherein the variably wound optical fiber includes: a first length arranged in a plurality of first loops with a first separation distance between successive ones of the first loops; and a second length arranged in a plurality of second loops with a second separation distance between successive ones of the second loops; wherein the first separation distance between successive ones of the first loops is greater than the second separation distance between successive ones of the second loops; and packaging to remove heat generated by the optical fiber of the fiber laser during operation of the fiber laser, wherein the variably wound optical fiber is fixably mounted to a surface of a heat conductor of the packaging.

Fiber laser having variably wound optical fiber

A cladding stripper includes a plurality of transversal notches or grooves in the outer surface of an exposed inner cladding of a double clad optical fiber. Position and orientation of the notches can be selected to even out cladding light release along the cladding light stripper, enabling more even temperature distributions due to released cladding light. The notches on the optical fiber can be made with a laser ablation system.

Cladding light stripper and method of manufacturing

An optical delivery waveguide for a material laser processing system includes a small lens at an output end of the delivery waveguide, transforming laser beam divergence inside the waveguide into a spot size after the lens. By varying the input convergence angle and/or launch angle of the laser beam launched into the waveguide, the output spot size can be continuously varied, thus enabling a continuous and real-time laser spot size adjustment on the workpiece, without having to replace the delivery waveguide or a process head. A divergence of the laser beam can also be adjusted dynamically and in concert with the spot size.

Varying beam parameter product of a laser beam

The invention provides fiber-optic light sources such as cladding-pumped master oscillator&#x2014;power amplifier (MOPA) systems which use double-clad optical fibers (DCF). The inner cladding of the first DCF used in the master oscillator section has a circular cross-section in order to enable the formation of low loss optical splices in the integrated MOPA structure. The inner cladding of the second DCF in the output amplifier section has a shaped non-circular cross-section in order to enhance the absorption of the pump light in the doped core of the second DCF.

Master oscillator&#x2014;power amplifier systems

The invention relates to pulsed optical sources formed of a source of seed optical radiation, a pulsed optical amplifier for pulsing the seed optical radiation, and an output optical port for outputting a pulsed optical signal produced by the pulsed optical amplifier. An optically isolating element such as an optical circulator is provided in the optical path between the optical seed source and the pulsed optical amplifier.

Pulsed optical source

The invention relates to a laser system including a nonlinear crystal having a first length portion and a second length portion. The nonlinear crystal disposed to receive input light from the laser for converting the input light into frequency converted light; wherein the nonlinear crystal is configured so that the first length portion of the nonlinear crystal is phase matching for the input light and the frequency converted light, and the second length portion of the nonlinear crystal is phase mismatching for the input light and the frequency converted light. Phase mismatching means may include a temperature controlling board, a clamp, or electrodes.

Frequency conversion of a laser beam using a partially phase-mismatched nonlinear crystal

A cladding mode stripper for stripping cladding modes from an optical fiber is disclosed. The cladding mode stripper includes a reflective base and a block of a transparent material disposed on the reflective base. The block of the transparent material has a groove in its bottom surface for the fiber. The fiber is thermally coupled to the base and optically coupled to the groove in the block, for example using an index matching gel. The cladding mode light is reflected from the reflective base and is absorbed in a cover enclosing the block. An additional thin block of transparent heat-conductive material can be placed between the fiber and the reflective base, to prevent the index matching gel from contacting the reflective surface of the base.

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Mountain View, CA, United States of America

Dahv Kliner