Raytheon Company

Andrew D W McKie

David M Filgas

Daniel P Resler

Brian F Boland

John M Bergeron

Linda A Palmaccio

Carl E Buczala

The concepts, systems and methods described herein are directed towards encrypting optical signals prior to the optical signals being sensed, for example, by a sensor. An optical phased array (OPA) may be disposed between an optical chain and a sensor to encrypt an optical signal being sensed before the signal is received at the sensor. The method includes receiving an optical signal having a plurality of beams organized in a first arrangement at an optical phased array, encrypting the optical signal in the optical phased array by steering or otherwise phase shifting the plurality of beams from the first arrangement to a second arrangement, transmitting the plurality of beams in the second arrangement from the optical phased array to a sensor and sensing the encrypted optical signal having the plurality of beams in the second arrangement at the sensor.

Systems and methods for encrypting optical signals

A system includes a master oscillator configured to generate a low-power optical beam. The system also includes a planar waveguide (PWG) amplifier configured to generate a high-power optical beam using the low-power optical beam. The PWG amplifier has a larger dimension in a slow-axis direction and a smaller dimension in a fast-axis direction. The system further includes at least one adaptive optic (AO) element configured to modify the low-power optical beam along the slow-axis direction and to modify the low-power optical beam along the fast-axis direction. In addition, the system includes a feedback loop configured to control the at least one AO element. The modification in the slow-axis direction can compensate for thermal-based distortions created by the PWG amplifier, and the modification in the fast-axis direction can compensate for optical misalignment associated with the master oscillator and the PWG amplifier.

Dual-axis adaptive optic (AO) system for high-power lasers

A system includes a master oscillator configured to generate a low-power optical beam. The system also includes a planar waveguide (PWG) amplifier configured to amplify the low-power beam into a high-power output optical beam, where the PWG amplifier has a larger dimension in an unguided direction and a smaller dimension in a transverse guided direction. The system further includes an adaptive optic configured to pre-distort the low-power optical beam substantially along a single dimension prior to injection of the low-power optical beam into the PWG amplifier in order to compensate for thermal-based distortions created by the PWG amplifier. The single dimension represents the unguided direction. In addition, the system includes a feedback loop configured to control the adaptive optic.

Planar waveguide (PWG) amplifier-based laser system with adaptive optic wavefront correction in low-power beam path

An assembly having a liquid crystal molecule section, a reflector section, disposed on the liquid crystal molecule section, having a stack of dielectric layers having alternating higher and lower indices of refraction; and an array of electrode sections disposed between a pair of the dielectric layers, one of said pair of dielectric layers having a higher index than the other one of said pair of dielectric layers. The electrodes in the array are interdigitated electrode for producing electric fields parallel to the array. The reflector section is disposed between the liquid crystal molecule section and a thermally conductive substrate.

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Northborough, MA, United States of America

Andrew D W McKie