Optical waveguides – Directional optical modulation within an optical waveguide – Electro-optic
Reexamination Certificate
2006-06-27
2006-06-27
Healy, Brian (Department: 2883)
Optical waveguides
Directional optical modulation within an optical waveguide
Electro-optic
C385S008000, C385S037000, C385S129000, C385S130000, C385S131000, C385S132000
Reexamination Certificate
active
07068866
ABSTRACT:
A PIN electro-optical traveling wave modulator (10) including diffraction gratings (34, 36) positioned at opposing sides of an optical waveguide (20) that act to change the propagation pattern of the waveguide (20). The modulator (10) includes an N-type layer (14), a P-type layer (18) and an intrinsic layer (16) acting as the waveguide (20). A metal electrode (26) is in electrical contact with the N-type layer (14), and a metal electrode (30) is in electrical contact with the P-type layer (18). The electrodes (26, 30) define an RF transmission line. An optical wave (22) propagates along the waveguide (20) and interacts with the gratings (34, 36) which slow the optical wave (22) to match its speed to the speed of the RF wave in the transmission line. In one embodiment, the gratings (34, 36) are 2-D gratings formed by vertical holes (38) in the waveguide (20).
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Kunkee Elizabeth T
Scott David C
Wang Wenshen
Carmen B. Patti & Assoc. LLC
Healy Brian
Northrop Grumman Corporation
Peng Charlie
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