Ultrafast transient grating radiation to optical image converter

Stewart, Richard E; Vernon, Stephen P; Steel, Paul T; Lowry, Mark E

Ultrafast transient grating radiation to optical image converter

Patent · Tue Nov 04 04:00:00 EST 2014

OSTI ID:1163194

Stewart, Richard E; Vernon, Stephen P; Steel, Paul T; Lowry, Mark E

A high sensitivity transient grating ultrafast radiation to optical image converter is based on a fixed transmission grating adjacent to a semiconductor substrate. X-rays or optical radiation passing through the fixed transmission grating is thereby modulated and produces a small periodic variation of refractive index or transient grating in the semiconductor through carrier induced refractive index shifts. An optical or infrared probe beam tuned just below the semiconductor band gap is reflected off a high reflectivity mirror on the semiconductor so that it double passes therethrough and interacts with the radiation induced phase grating therein. A small portion of the optical beam is diffracted out of the probe beam by the radiation induced transient grating to become the converted signal that is imaged onto a detector.

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC52-07NA27344

Assignee:: Lawrence Livermore National Security, LLC (Livermore, CA)

Patent Number(s):: 8,879,137

Application Number:: 13/423,498

OSTI ID:: 1163194

Country of Publication:: United States

Language:: English

References (12)

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Nonlinear optical and bistable properties of a wafer-fused vertical-cavity device based on InGaAsP Jeannès, F.; Lugagne-Delpon, E.; Tanguy, C. Optics Communications, Vol. 134, Issue 1-6, p. 607-614 https://doi.org/10.1016/S0030-4018(96)00565-2	journal	January 1997
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