Low speckle noise monolithic microchip RGB lasers

Details Low speckle noise monolithic microchip RGB lasers Low speckle noise monolithic microchip RGB lasers

2006-06-15

2008-11-25

Harvey, Minsun (Department: 2828)

Coherent light generators

Particular beam control device

Nonlinear device

C372S021000

Reexamination Certificate

active

07457330

ABSTRACT:
A method for reducing speckle noise of a monolithic microchip laser with intracavity beam combining and sum frequency mixing is based on time averaging of uncorrelated speckle patterns generated from a large number of independent longitudinal modes and comprises schemes including selection of gain media and nonlinear optical materials to support broadband sum frequency mixing; adoption of gain-conjugated and/or chirped mirrors for flat-top spectra and/or mode phase diversification; multimode laser operation introduced by RF modulation; and multiplication of source modes in frequency mixing process featured with degeneration free and narrowed/uneven intervals. A device and an apparatus for generating low speckle noise red, green, blue lasers adaptable for color display systems are developed based on the inventive method.

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