Nonlinear optical device including poled waveguide and associate

Details Nonlinear optical device including poled waveguide and associate Nonlinear optical device including poled waveguide and associate

1997-02-07

1999-08-24

Ngo, Hung N.

Optical waveguides

Having nonlinear property

385 92, 385 49, G02B 626

Patent

active

059434643

ABSTRACT:
A nonlinear optical device includes a waveguide adjacent a substrate. The waveguide is preferably formed of a polymer or other matrix material that contains chromophores having different dipole moment directions when in respective different energy states. The chromophores may be poled to have alternating first and second dipole moment directions thereby defining corresponding alternately poled waveguide portions. Accordingly, quasi-phase matching in the waveguide may be readily achieved for application in optical frequency conversion, for example. The chromophores preferably exhibit relatively high second-order nonlinearity and may be poled to have opposite first and second dipole moment directions. A method aspect of the invention is for making nonlinear optical devices and may include the steps of: forming a waveguide comprising a matrix material containing chromophores having different dipole moment directions when in different energy states; and poling the chromophores to have alternating first and second dipole moment directions thereby defining corresponding alternately poled waveguide portions. The chromophores may be poled by a patterned mask or by alternating light and dark bands formed by an interference pattern between two laser beams.

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