Luxtera, Inc.

Sharp Laboratories of America, Inc

Lieven Verslegers

Attila Mekis

Gianlorenzo Masini

Subal Sahni

Peter De Dobbelaere

Kam-Yan Hon

Yannick De Koninck

Peng Sun

Steffen Gloeckner

Adithyaram Narasimha

Xiao-Fan Feng

Methods and systems for stabilized directional couplers are disclosed and may include a system comprising first and second directional couplers formed by first and second waveguides, where one of the waveguides may comprise a length extender between the directional couplers. The directional couplers may be formed by reduced spacing between the waveguides on opposite sides of the length extender. An input optical signal may be communicated into one of the waveguides, where at least a portion of the input optical signal may be coupled between the waveguides in the first directional coupler and at least a portion of the coupled optical signal may be coupled between the waveguides in the second directional coupler. Optical signals may be communicated out of the system with magnitudes at a desired percentage of the input optical signal. The length extender may add phase delay for signals in one of the first and second waveguides.

Method and system for stabilized directional couplers

Methods and systems for grating couplers incorporating perturbed waveguides are disclosed and may include in a semiconductor photonics die, communicating optical signals into and/or out of the die utilizing a grating coupler on the die, where the grating coupler comprises perturbed waveguides. The perturbed waveguides may include rows of continuous waveguides with scatterers extending throughout a length of the perturbed waveguides a variable width along their length. The grating coupler may comprise a single polarization grating coupler comprising perturbed waveguides and a non-perturbed grating. The grating coupler may comprise a polarization splitting grating coupler (PSGC) that includes two sets of perturbed waveguides at a non-zero angle, or a plurality of non-linear rows of discrete shapes. The PSGC may comprise discrete scatterers at an intersection of the sets of perturbed waveguides. The grating coupler may comprise individual scatterers between the perturbed waveguides.

Method and system for grating couplers incorporating perturbed waveguides

Methods and systems for a silicon-based optical phase modulator with high modal overlap may include, in an optical modulator having a rib waveguide in which a cross-shaped depletion region separates four alternately doped sections: receiving an optical signal at one end of the optical modulator, modulating the received optical signal by applying a modulating voltage, and communicating a modulated optical signal out of an opposite end of the modulator. The modulator may be in a silicon photonically-enabled integrated circuit which may be in a complementary-metal oxide semiconductor (CMOS) die. An optical mode may be centered on the cross-shaped depletion region. The four alternately doped sections may include: a shallow depth p-region, a shallow depth n-region, a deep p-region, and a deep n-region. The shallow depth p-region may be electrically coupled to the deep p-region periodically along the length of the modulator.

Method and system for a silicon-based optical phase modulator with high modal overlap

Methods and systems for silicon photonics wavelength division multiplexing transceivers are disclosed and may include, in a transceiver integrated in a silicon photonics chip: generating a first modulated output optical signal at a first wavelength utilizing a first electrical signal, generating a second modulated output optical signal at a second wavelength utilizing a second electrical signal, communicating the first and second modulated output optical signals into an optical fiber coupled to the chip utilizing a multiplexing grating coupler in the chip. A received input optical signal may be split into a modulated input optical signal at the first wavelength and a modulated input optical signal at the second wavelength utilizing a demultiplexing grating coupler in the chip. The first and second modulated input optical signals may be converted to first and second electrical input signals utilizing first and second photodetectors in the chip.

Method and system for silicon photonics wavelength division multiplexing transceivers

Methods and systems for a low-loss optical Y-Junction power splitter are disclosed and may include a semiconductor die having an optical Y-junction. The optical Y-junction may comprise an input waveguide, two or more output waveguides, a taper region and a step feature. The input waveguide and the taper region may include a smooth transition between the input waveguide and the taper region, and the step feature may be between the taper region and the output waveguides. The semiconductor die may receive an optical signal in the input waveguide, and communicate substantially equal power optical signals to the output waveguides. The semiconductor die may comprise a photonically-enabled silicon CMOS integrated circuit. An optical signal may be received in each of the output waveguides and a summed output signal may be communicated to the input waveguide. The step feature may extend in a direction perpendicular to an axis of the output waveguides.

Method and system for a low-loss optical Y-junction power splitter

Methods and systems for a silicon-based optical phase modulator with high modal overlap are disclosed and may include, in an optical modulator having a rib waveguide in which a cross-shaped depletion region separates four alternately doped sections: receiving an optical signal at one end of the optical modulator, modulating the received optical signal by applying a modulating voltage, and communicating a modulated optical signal out of an opposite end of the modulator. The modulator may be in a silicon photonically-enabled integrated circuit which may be in a complementary-metal oxide semiconductor (CMOS) die. An optical mode may be centered on the cross-shaped depletion region. The four alternately doped sections may include: a shallow depth p-region, a shallow depth n-region, a deep p-region, and a deep n-region. The shallow depth p-region may be electrically coupled to the deep p-region periodically along the length of the modulator.

Methods and systems for grating couplers incorporating perturbed waveguides are disclosed and may include in a semiconductor photonics die, communicating optical signals into and/or out of the die utilizing a grating coupler on the die, where the grating coupler comprises perturbed waveguides. The perturbed waveguides may include rows of continuous waveguides with scatterers extending throughout a length of said perturbed waveguides a variable width along their length. The grating coupler may comprise a single polarization grating coupler comprising perturbed waveguides and a non-perturbed grating. The grating coupler may comprise a polarization splitting grating coupler (PSGC) that includes two sets of perturbed waveguides at a non-zero angle, or a plurality of non-linear rows of discrete shapes. The PSGC may comprise discrete scatterers at an intersection of the sets of perturbed waveguides. The grating coupler may comprise individual scatterers between the perturbed waveguides.

Methods and systems for grating couplers incorporating perturbed waveguides are disclosed and may include in a semiconductor photonics die, communicating optical signals into and/or out of the die utilizing a grating coupler on the die, where the grating coupler comprises perturbed waveguides. The perturbed waveguides may include rows of continuous waveguides with non-discrete scatterers extending throughout a length of said perturbed waveguides a variable width along their length. The grating coupler may comprise a single polarization grating coupler comprising perturbed waveguides and a non-perturbed grating. The grating coupler may comprise a polarization splitting grating coupler (PSGC) that includes two sets of perturbed waveguides at a non-zero angle, or a plurality of non-linear rows of discrete shapes. The PSGC may comprise discrete scatterers at an intersection of the sets of perturbed waveguides. The grating coupler may comprise individual scatterers between the perturbed waveguides.

A system for grating couplers incorporating perturbed waveguides is disclosed and may include, in a semiconductor photonics die, communicating optical signals into and/or out of said semiconductor die utilizing a grating coupler on the semiconductor photonics die, where the grating coupler includes perturbed waveguides as scattering elements, and the perturbed waveguides comprise rows of continuous waveguides defined by non-discrete scatterers. The perturbed waveguides may include a variable width along a length of the perturbed waveguides. The grating coupler may include a single polarization grating coupler comprising perturbed waveguides and a non-perturbed grating, or a polarization splitting grating coupler including two sets of rows of perturbed waveguides at a non-zero angle from each other. The polarization splitting grating coupler may include discrete scatterers at an intersection of the two sets of rows of perturbed waveguides and/or may include non-linear rows of discrete shapes at an intersection of the perturbed waveguides.

Growing community of inventors

La Jolla, CA, United States of America

Lieven Verslegers