Coherent, Inc.

Lots Technology, Inc.

Qi-Ze Shu

Andrea Caprara

Juan L Chilla

William S Oakley

Mahdad Manavi

Charles King

Christopher Ihli

A fiber-laser includes a gain-fiber in a laser-resonator. A polarizer is located in the laser-resonator at an end thereof, causing the output of the fiber-laser to be linearly polarized. A wavelength-selective element is also included in the laser-resonator for selecting an output wavelength of the fiber-laser from within a gain-bandwidth of the gain-fiber.

Polarized fiber-laser

A two-chip OPS laser includes first and second OPS-chips each emitting the same fundamental wavelength in first and second resonators. The first and second resonators are interferometrically combined on a common path terminated by a common end-mirror. The interferometric combination provides for automatic wavelength-locking of the laser, which can eliminate the need for a separate wavelength selective device in the laser.

Multi-chip OPS-laser

An OPS-chip is soldered mirror-structure-side down on an upper surface of diamond-heat spreader. A metal frame is also soldered to the upper surface of the heat-spreader. The lower surface of the diamond heat-spreader is either soldered to, or clamped against, a surface of a heat-sink. The dimensions of the frame and the heat spreader are selected such that at a solidification temperature of the solder at the center of the upper surface of the heat-spreader has an effective CTE comparable with that of the OPS-chip. The lower surface of the heat-spreader can be soldered to the heat sink surface or clamped against the heat-sink surface by the frame.

Cooling apparatus for optically pumped semiconductor laser

An optically pumped semiconductor-laser (OPS-laser) resonator includes an arrangement for delivering optical pump radiation on an OPS-chip to cause fundamental radiation to circulate in the resonator. The resonator includes second and third-harmonic generating crystals and is arranged deliver third-harmonic radiation. The resonator also includes a stop positioned and configured to stabilize the laser output. The pump radiation arrangement delivers the pump radiation at an angle to the resonator axis and includes wedged GRIN lens arranged such that the pump radiation forms a circular spot on the OPS chip. The third harmonic generating crystal acts as a polarizer for the fundamental radiation and angularly separates fundamental and third harmonic beams.

External-cavity optically-pumped semiconductor-laser with a resonator stop

Micro fabricated arrays of optical modulators of both a surface electrode and machined mesa nature where the small structure size and low capacitance electrical connections permit each modulator element to be individually electrically addressed thus providing modulator optical rise and fall response times in the low and sub nanosecond range. Both sparsely spaced and closely packed arrays are achieved.

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Cupertino, CA, United States of America

Qi-Ze Shu