Amplitude and phase control in distributed optical structures

Details Amplitude and phase control in distributed optical structures Amplitude and phase control in distributed optical structures

2005-11-15

2005-11-15

Palmer, Phan T. H. (Department: 2874)

Optical waveguides

With optical coupler

Input/output coupler

C385S003000, C385S010000, C385S014000, C359S565000, C359S569000

Reexamination Certificate

active

06965716

ABSTRACT:
A distributed optical structure comprises a set of diffractive elements. Individual diffractive element transfer functions collectively yield an overall transfer function between entrance and exit ports. Diffractive elements are defined relative to virtual contours and include diffracting region(s) altered to diffract, reflect, and/or scatter incident optical fields (altered index, surface, etc). Element and/or overall set transfer functions (amplitude and/or phase) are determined by: longitudinal and/or angular displacement of diffracting region(s) relative to a virtual contour (facet-displacement grayscale); longitudinal displacement of diffractive elements relative to a virtual contour (element-displacement grayscale); and/or virtual contour(s) lacking a diffractive element (proportional-line-density gray scale). Optical elements may be configured: as planar or channel waveguides, with curvilinear diffracting segments; to support three-dimensional propagation with surface areal diffracting segments; as a diffraction grating, with grating groove or line segments.

REFERENCES:
patent: 6678429 (2004-01-01), Mossberg et al.
patent: 6829417 (2004-12-01), Greiner et al.

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