Optical waveguides – With optical coupler – Particular coupling structure
Reexamination Certificate
2006-06-27
2006-06-27
Pak, Sung (Department: 2874)
Optical waveguides
With optical coupler
Particular coupling structure
C385S043000, C385S046000
Reexamination Certificate
active
07068888
ABSTRACT:
An optical interconnection apparatus including waveguide arrays such as waveguide lenses, waveguide gratings and star couplers, has improved efficiency realized using a periodic array combined with an arrangement of matching sections. The array is connected to a slab region containing the array focal point and the purpose of the matching sections is to minimize unwanted radiation by the array outside the central zone of the array. This unwanted radiation is primarily caused by two particular unwanted modes excited at the array junction with the slab, and the resulting loss is minimized by properly choosing the average phase shift applied by each section to said unwanted modes.
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patent: 5745618 (1998-04-01), Li
patent: 6058233 (2000-05-01), Dragone
Corrado Dragone, “Optimum Design of a Planar Array of Tapered Waveguides”, reprinted from Journal of the Optical Society of America, vol. 7, No. 11, Nov. 1990, pp. 2081-2093.
Corrado Dragone, “Theory of Wavelength Multiplexing with Rectangular Transfer Functions”, IEEE Journal of Selected Topics in Quantum Electronics, vol. 8, No. 6, Nov. 2002, pp. 1168-1178.
Corrado Dragone, “Planar Waveguide Array with Nearly Ideal Radiation Characteristics”, Electronic Letters, vol. 38, No. 16, Aug. 2002, pp. 880-881.
Pak Sung
Wong Tina M
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