The Research and Development Intstitute

Montana State University

S2 Corporation

Rufus Cone

Peter B Sellin

Randy W Equall

John L Carlsten

Nicholas M Strickland

Zeb William Barber

Krishna Rupavatharam

Kristian D Merkel

Alex Woidtke

Calvin Harrington

Charles W Thiel

Colton Richard Stiffler

Aaron Traxinger

Yongchen Sun

Guanrring Wang

Techniques for spatial spectral holography include a doped crystal comprising Thulium doped into a host crystal of Yttrium Lutetium Aluminum Garnet wherein a concentration of Thulium atoms is less than 3 atomic percent. Techniques further include an apparatus with a source for optical electromagnetic radiation and a cryocooler configured to maintain an operating temperature in a range from about 3 Kelvin to about 6 Kelvin. The cryocooler includes a first optical window. The apparatus also includes a doped crystal comprising Thulium doped into a host crystal of Yttrium Lutetium Aluminum Garnet disposed inside the cryocooler in a position to be illuminated by incident optical electromagnetic radiation derived from the source. The apparatus also includes a detector configured to detect optical electromagnetic radiation emitted from the doped crystal. Techniques include a method for using at least one of the above doped crystals.

Techniques for spatial spectral holography

Laser frequency stabilizer using transient spectral hole burning

Techniques for stabilizing a laser ( ) at a selectable frequency include splitting an output beam from an electrically adjustable laser into a first beam ( ) and a second beam ( ). The second beam is transmitted through a modulator ( ). Then the second beam is transmitted through a spectral hole burning material ( ) onto a detector ( ). The laser is electronically adjusted in response to a detector output from the detector which senses the changes in the modulated second beam after it passes through the spectral hole burning material.

Programmable frequency reference for laser frequency stabilization, and arbitrary optical clock generator, using persistent spectral hole burning

A method for optimizing the interaction of a resonant material having generalized crystal symmetry with a beam or beams of radiation. The invention includes determining a special direction relative to the axes of crystal symmetry of the material and polarizing the interaction radiation beam along this direction. The polarized radiation beam is propagated through the material perpendicular to this special direction. The method and system are used in any application which involves the coherent interaction of optical radiation beams or fields with resonant ion-doped or molecular crystals of various types. Coherent interaction of optical radiation beams or fields with resonant ion-doped or molecular crystals of various types includes the phenomena of optical coherent transients, spectral hole burning, and spatial-spectral holography (also called time and space domain holography) and provides the basis for optical-electronic devices. Such applications include computer and communications networks.

Coherent interaction of optical radiation beams with optical-electronic materials of generalized crystal symmetry

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Bozeman, MT, United States of America

Rufus Cone