Huawei Technologies Co., Limited

Universiteit Gent

Interuniversitair Microelektronica Centrum (imec)

Interuniversitair Micorelektronica Centrum (imec, Vzw)

Dirk Taillaert

Roeland Baets

Günther Roelkens

Dries Van Thourhout

Roel Baets

Jonathan Schrauwen

Marco Lamponi

Martijn Tassaert

Ulagalandha Perumal Dharanipathy

Joost Brouckaert

Frederik Van Laere

Diederik Vermeulen

Sébastien Lardenois

Tom Collins

Diedrik Vermeulen

The present disclosure provides a wavelength division multiplexing (WDM) device for demultiplexing an optical signal including a plurality of wavelength channels. The device comprises at least one demultiplexer block configured to provide, for each wavelength channel of the optical signal, two half-channel signals. The device further comprises a mode mapping block configured to map one half-channel signal related to a split wavelength channel into a first polarization mode, and the other half-channel signal related to the same split wavelength channel into a second polarization mode. The device also comprises an output block for each wavelength channel, each output block being configured to combine polarized half-channel signals related to the same wavelength channel.

Wavelength division multiplexing device and method

Disclosed are optical devices for coupling radiation between an optical waveguide and an external medium. In one embodiment, an optical device is disclosed comprising a semiconductor die comprising an integrated optical waveguide core and an overlying optical waveguide comprising a waveguide taper and a waveguide facet. The overlying optical waveguide at least partially overlies the integrated optical waveguide core, and the waveguide facet is between about 1 &#x3bc;m and 200 &#x3bc;m from an edge of the semiconductor die. In another embodiment, a method is disclosed comprising providing a substrate comprising an integrated semiconductor waveguide and forming on the substrate an overlying waveguide comprising a waveguide taper and a waveguide facet. The overlying waveguide at least partially overlies the integrated semiconductor waveguide. The method further includes cutting the substrate about 1 &#x3bc;m and 200 &#x3bc;m from the waveguide facet.

Coupling methods and systems using a taper

An optical coupler for processing radiation is described. The optical coupler comprises a first deep-shallow waveguide and a second deep-shallow waveguide for guiding radiation in a propagation direction. Each of the deep-shallow waveguides is a waveguide comprising a shallow etched portion and an unetched portion having a width substantially constant along the propagation direction. The width of the shallow etched portion is substantially larger than the width of the unetched portion. The shallow etched portion of the first deep-shallow waveguide and the shallow etched portion of the second deep-shallow waveguide are arranged sufficiently close for coupling radiation from the first deep-shallow waveguide to the second deep-shallow waveguide.

Deep-shallow optical radiation filters

A slanted grating coupler for coupling a radiation beam between a waveguide lying substantially in a plane on a substrate and an optical element outside that plane is provided, whereby the slanted grating coupler has a good coupling efficiency for medium or low index contrast material systems. Furthermore, a method for manufacturing the slanted grating coupler is provided. The slanted grating coupler comprises a plurality of slanted slots extending through the waveguide core and being arranged successively in the propagation direction of the waveguide. In at least part of the coupling region, the size of the slanted slots in a lateral direction, being a direction within the waveguide plane and perpendicular to the propagation direction of the waveguide, is smaller than the lateral size of the waveguide core. Successive slots are displaced with respect to each other in the lateral direction. Radiation incident from the waveguide on a slanted slot of the slanted segmented coupler is partly reflected upwards at the interface with air. Part of the radiation is transmitted in between or around the slots and propagates further, until it reaches another slot.

Slanted segmented coupler

An optical waveguide to fiber coupler comprises a substrate, a first waveguide and a second waveguide. The first and second waveguides are formed on the substrate and intersect at a right angle. A diffraction grating structure is formed at the intersection of the first and second waveguides, such that, when the coupler is physically abutted with a single mode optical fiber, in operation, a polarization split is obtained that couples orthogonal modes from the single-mode optical fiber into single identical modes in the first and second waveguides. Also, employing the coupler in optical polarization diverse applications provides for implementing a polarization insensitive photonic integrated circuit using such diffraction grating structures, such as, for example, photonic crystals.

Fiber-to-waveguide coupler

Growing community of inventors

Bredene, Belgium

Dirk Taillaert