Abstract: A mode-selective add/drop unit for a mode division de/multiplexing device includes an optical ADU waveguide adapted for coupling to an input optical waveguide. The optical ADU waveguide includes at least one region providing optical signal coupling between the ADU waveguide and a multi-mode waveguide; and, one or more phase matching regions for controlling a relative or absolute phase difference between an electromagnetic wave (EMW) carried in the ADU waveguide and the multi-mode waveguide. The mode-selective add/drop unit may further include a transition region connecting the coupling region and a phase matching region, wherein a shape of a transition region is governed by a polynomial function, exponential function, logarithmic function, trigonometric function or, any combination of these functions.

Abstract: A method and structure for coupling to a plurality of multicore optical fiber strands. A first plurality of optoelectronic devices is provided on a surface of a substrate, the first optoelectronic devices being arranged in a 2D array pattern that corresponds to a 2D array pattern corresponding to different light cores of a first multicore optical fiber. A second plurality of optoelectronic devices is provided on the surface of the substrate, the second optoelectronic devices being arranged in a 2D array pattern that corresponds to a 2D array pattern corresponding to different light cores of a second multicore optical fiber. Each optoelectronic device on the substrate surface provides one of a receive function and a transmit function for interacting with a corresponding core of a multicore optical fiber strand.

Abstract: A mode-selective add/drop unit for a mode division de/multiplexing device includes an optical ADU waveguide adapted for coupling to an input optical waveguide. The optical ADU waveguide includes at least one region providing optical signal coupling between the ADU waveguide and a multi-mode waveguide; and, one or more phase matching regions for controlling a relative or absolute phase difference between an electromagnetic wave (EMW) carried in the ADU waveguide and the multi-mode waveguide. The mode-selective add/drop unit may further include a transition region connecting the coupling region and a phase matching region, wherein a shape of a transition region is governed by a polynomial function, exponential function, logarithmic function, trigonometric function or, any combination of these functions.

Abstract: A mode-selective add/drop unit for a mode division de/multiplexing device includes an optical ADU waveguide adapted for coupling to an input optical waveguide. The optical ADU waveguide includes at least one region providing optical signal coupling between the ADU waveguide and a multi-mode waveguide; and, one or more phase matching regions for controlling a relative or absolute phase difference between an electromagnetic wave (EMW) carried in the ADU waveguide and the multi-mode waveguide. The mode-selective add/drop unit may further include a transition region connecting the coupling region and a phase matching region, wherein a shape of a transition region is governed by a polynomial function, exponential function, logarithmic function, trigonometric function or, any combination of these functions.

Abstract: A method and structure for coupling to a plurality of multicore optical fiber strands. A first plurality of optoelectronic devices is provided on a surface of a substrate, the first optoelectronic devices being arranged in a 2D array pattern that corresponds to a 2D array pattern corresponding to different light cores of a first multicore optical fiber. A second plurality of optoelectronic devices is provided on the surface of the substrate, the second optoelectronic devices being arranged in a 2D array pattern that corresponds to a 2D array pattern corresponding to different light cores of a second multicore optical fiber. Each optoelectronic device on the substrate surface provides one of a receive function and a transmit function for interacting with a corresponding core of a multicore optical fiber strand.

Abstract: A mode-selective add/drop unit for a mode division de/multiplexing device includes an optical ADU waveguide adapted for coupling to an input optical waveguide. The optical ADU waveguide includes at least one region providing optical signal coupling between the ADU waveguide and a multi-mode waveguide; and, one or more phase matching regions for controlling a relative or absolute phase difference between an electromagnetic wave (EMW) carried in the ADU waveguide and the multi-mode waveguide. The mode-selective add/drop unit may further include a transition region connecting the coupling region and a phase matching region, wherein a shape of a transition region is governed by a polynomial function, exponential function, logarithmic function, trigonometric function or, any combination of these functions.

Abstract: An optical testing device includes an optical fiber having a first numerical aperture at a first end of the optical fiber. A positioning structure is attached to the optical fiber for moving the first end of the optical fiber to any portion of a substrate for testing an optical device. The optical device may be disposed at any location on the substrate and provides a light beam with an emission angle less than the first numerical aperture. A test head collects the light beam through the optical fiber to test the optical device. A method for positioning the optical fiber and testing the optical device is also disclosed.