Leland Stanford Junior University

Other

Lawrence E Myers

Robert L Byer

Martin M Fejer

Gregory David Miller

Martin H Muendel

Dahv Kliner

Derek A Tucker

Robert C Eckardt

The invention relates to a laser system including a nonlinear crystal having a first length portion and a second length portion. The nonlinear crystal disposed to receive input light from the laser for converting the input light into frequency converted light; wherein the nonlinear crystal is configured so that the first length portion of the nonlinear crystal is phase matching for the input light and the frequency converted light, and the second length portion of the nonlinear crystal is phase mismatching for the input light and the frequency converted light. Phase mismatching means may include a temperature controlling board, a clamp, or electrodes.

Frequency conversion of a laser beam using a partially phase-mismatched nonlinear crystal

A method of patterning domains within a body of a ferroelectric material includes the application of an electric field thereto via spaced conductors. Prior to applying the electric field to the material effects on the patterning of the existence of fringe electric field components which will be created in said body by said application of an electric field, surface treatments, and relative geometries of the body and the conductors are examined. The steps of this examination include:

Electric field domain patterning

A method of domain patterning a body of ferroelectric material in which the effects of the materials which interface with the body are selected to provide selected characteristics to the domain pattern.

Devices for increasing the power handling capability through increased aperture size of patterned poled nonlinear optical material are disclosed. One embodiment employs a prism bonded to the top surface of a plate (a surface parallel to the plate) of poled material. The faces of the prism provide entrance and exit windows for light. Light enters the prism, enters the first surface of the plate at a small angle, reflects from the bottom surface of the plate and then exits the device through the prism exit window. The plate exerts a nonlinear effect on the light. Higher power handling is achieved because, compared to prior art techniques, the light is spread over a larger area in the poled plate. A second embodiment provides for the same advantages by bonding several plates to form a single unit. The plates are stacked, aligned, and bonded together. The result is a single unit with a larger aperture and therefore higher optical power handling capability than is possible with a single plate. Also, a stack of patterned plates provides the ability to construct nonlinear optical devices with three-dimensional poled patterns.

Patterned poled structure devices having increased aperture size,

A method of domain patterning a body of ferroelectric material is disclosed. This method includes patterning the surface of the material with conducting strips for applying an electric field of desired configuration to said body and covering the conductive strips and surface of the body with insulating material to control the fringe electric field components in the body of ferromagnetic material.

A method of domain patterning a body of ferroelectric material. The method includes the steps of adhering spaced conducting strips to a surface of said body; covering portions of said surface of said body between said strips with material which is insulative relative to electric current produced when an electric field configuration is created in said body and which controls the formation of fringe electric field components in said material; and applying potentials simultaneously to said conducting strips and to a surface of said insulative material to create an electric field configuration in said body whereby said strips define said electric field configuration within said body and wherein said insulating material between said strips defines a potential within said body which is generally the same as the potential applied to said conducting strips.

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Stanford, CA, United States of America

Lawrence E Myers