US 6,650,665 B2Granted

High-power blue and green light laser generation from high-powered diode lasers

OwnerRuey-Jen Hwu, John M. Worlock +2inventors

InventorsRuey-Jen Hwu, John M. Worlock, Mike Willis, Robert Gwynn

Life of this patent

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Abstract

A mode controlling device for capturing a highly divergent, multi-mode laser beam received from a high-power broad area laser source and producing a narrow, single-mode laser beam. In one embodiment, the mode controlling device comprises a diffractive device having a nonplanar profile positioned to receive the multi-mode laser beam. The diffractive device comprises a plurality of grooves for receiving the multi-mode laser beam and diffracting light to a reflective medium, thereby creating feedback for producing a narrow, single-mode laser beam with a non-uniform intensity profile. The reflective medium may be positioned at the surface of the diffractive device; alternatively, the reflective medium may be positioned at a predetermined distance from the diffractive device.

Claims6

Dependent claims

A mode controlling device for capturing a highly divergent, multi-mode laser beam received from a high-power, broad area laser source, wherein the mode controlling device comprises:

a volume holographic transmission grating having a nonplanar profile positioned to receive the multi-mode laser beam, wherein the volume holographic transmission grating comprises a plurality of grooves for receiving the multi-mode laser beam and generating diffracted light;
and
a reflector positioned to receive the diffracted light, wherein the reflector is configured to direct a reflection of the diffracted light back to the volume holographic transmission grating, wherein the volume holographic transmission grating is positioned to receive the reflected light and to generate feedback for controlling the spatial coherence of the highly divergent, multi-mode laser beam, thereby generating an output having a controlled mode.

Dependencies are inferred from the claim text.

Facts

Application: 10/137,894Filed 2 May 2002 · continuation
Priority: 31 Aug 1999
Published: US 2002/0154673 A124 Oct 2002
Granted: 18 Nov 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H01S 5/14
Construction or shape of the optical resonator , e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or…:…
G02F 1/37
Non-linear optics: for second-harmonic generation
G02F 1/372
For second-harmonic generation: means for homogenizing the output beam
H01S 5/141
External cavity lasers: using a wavelength selective device, e.g. a grating or etalon

Family

Application60/151,779Us provisional application · filed 31 Aug 1999
Application60/151,664Us provisional application · filed 31 Aug 1999
Application60/156,982Us provisional application · filed 1 Oct 1999
Application60/157,381Us provisional application · filed 1 Oct 1999
Application09/652,490Parent of this continuation · filed 31 Aug 2000
US 2002/0154673 A1Pre-grant publication · published 24 Oct 2002
US 6,414,973 B1Parent of this continuation
US 6,650,665 B2This patent

From the US filing history. Foreign family members aren’t listed.