Northrop Grumman Systems Corporation

Other

Ronald K Meyer

Gerald Pray Griffith

Peter H Mui

Mohan Vaidyanathan

William Pekny

James M Cicchiello

An integrated optical parametric oscillator, having an optical parametric oscillation region to convert a pump source into a signal beam and an idler beam, and a fine-steering region to adjust optical path of the signal beam in order to finely select a required wavelength component of the signal beam. The optical parametric oscillator is contoured with a plurality of exterior planes with specific reflective characteristics to form a resonator of the idler beam while reflecting and diffracting the signal beam with a desired wavelength.

Integrated narrow-line tunable optical parametric oscillator

The present invention relates generally to the field of optical devices and particularly to embodiments of a three-stage PPLN optical parametric oscillator/difference-frequency generator configuration. The present invention allows simultaneous generation of three wavelengths in efficient use of the pump signal. The structure of the first embodiment of the present invention comprises a first PPLN element having first and second grating regions, and a second PPLN element having its own grating period. An input coupler is positioned at the input and exit ends of a resonator cavity and the first PPLN element is positioned between the input coupler and the second PPLN element. A second embodiment of the present invention includes a single PPLN element having three separate grating regions. The single PPLN element is positioned between input and output coupler mirrors. A third embodiment of the present invention includes a single PPLN element having three grating regions. The input and output couplers are affixed directly to the input and exit facets of the PPLN element.

Line periodically poled LiNbO.sub.3 (PPLN) optical parametric oscillator

The present invention relates generally to the field of optical devices and particularly to embodiments of a four-stage PPLN optical parametric oscillator/difference-frequency generator configuration. The present invention allows simultaneously and colinear generation of four wavelengths in efficient use of the pump signal. A first embodiment comprises a singly resonant cavity having an internal monolithic non-linear optical medium disposed in the cavity. The cavity is bounded by an input mirror and an output mirror. The monolithic non-linear optical medium is divided into four regions each having its own grating period. A second embodiment of the present invention comprises a monolithic non-linear optical medium divided into four separate regions. The entrance facet and exit facet of the monolithic non-linear optical medium includes a coating which acts as the cavity mirrors.

Quadruple grating period PPLN optical parametric oscillator difference

Automated bartender wall unit

Apparatus for the automated assembly of flowable materials into a receptacle for delivery to a selected location is disclosed. The apparatus includes a plurality of spaced flowable material dispensing means, a plurality of spaced receptacle storage means and a plurality of spaced receptacle delivery locations. A robot arm is provided to receive, support and transport the receptacles. The apparatus includes a computer adapted to cause the robot arm to select a receptacle at one of the receptacle storage means, transport it to more than one of the flowable material dispensing means in a predetermined sequence and deliver the receptacle with the assembly of flowable materials therein to a predetermined one of the receptacle delivery locations in response to a given computer command signal. Structural details of the robot arm and an embodiment of the apparatus specifically adapted to provide an automated bartender function are described.

Growing community of inventors

Chicago, IL, United States of America

Ronald K Meyer