Segmented waveguides having selected Bragg reflection characteri

Details Segmented waveguides having selected Bragg reflection characteri Segmented waveguides having selected Bragg reflection characteri

1991-09-19

1993-09-07

Ullah, Akm E.

Optical waveguides

Having nonlinear property

385130, 385129, 359326, 359328, G02B 610

Patent

active

052436764

ABSTRACT:
Segmented waveguides for wavelength conversion (e.g., waveguides comprising alternating sections of crystalline substrate having the formula K.sub.1-x Rb.sub.x TiOMO.sub.4 where x is from 0 to 1 and M is P or As and sections of substrate material in which cations of said substrate have been partially replaced) and devices and processes employing segmented waveguides for wavelength conversion are disclosed wherein a periodic structure along the waveguide provides a Bragg reflection having a wavelength essentially equal to the wavelength of the input wave used for wavelength conversion. Also disclosed is a process for preparing a channel waveguide for a wavelength conversion system wherein areas along a portion of a crystal substrate surface used for forming the desired channel are alternately masked and unmasked during cation replacement by immersion in a molten salt.

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