Skorpios Technologies, Inc.

Oracle International Corporation

Oracle America, Inc.

Southern Methodist University

Oracle America, Inc. Formerly Known As Sun Microsystems, Inc.

Guoliang Li

Ashok V Krishnamoorthy

Xuezhe Zheng

Ying Luo

John E Cunningham

Stephen B Krasulick

Ivan Shubin

Damien Lambert

Nikhil Kumar

Murtaza Askari

Jin Yao

Majid Sodagar

Hacene Chaouch

Gary Alan Evans

Hiren D Thacker

John Zyskind

Jay Bernard Kirk

Jerome K Butler

Yi Wang

Ruo-Hua He

Wenyi Wang

Changyi Li

John M Dallesasse

Shiyun Lin

Andrew Bonthron

Stevan S Djordjevic

Ronald Ho

Elton Marchena

Frankie Liu

Kannan Raj

Robert David Hopkins, Ii

Daming Liu

Jon Lexau

Stephen Krauslick

Samir Desai

A polarization-independent, optical circulator is formed in silicon photonics. The polarization-independent, optical circulator uses an optical splitter having two couplers and two waveguides joining the two couplers. One of the two waveguides is thinner than the other to create a large effective index difference between TE and TM modes transmitted through the one waveguide. Polarization rotators, including reciprocal and/or non-reciprocal rotators, are further used to create the optical circulator.

Monolithically-integrated, polarization-independent circulator

An optical bandpass filter includes an optical splitter having at least four ports, one of the ports being designated as an input port and one of the ports being designated as an output port. First and second reflectors couple with respective third and fourth ones of the ports. The splitter directs portions of the input light from the input port, into the third and fourth ports, such that the portions of the input light propagate toward the respective first and second reflectors. The first and second reflectors reflect light having wavelengths within a predetermined wavelength range, back toward the splitter, as wavelength-selected light, and transmit light having wavelengths that are outside of the predetermined wavelength range, away from the splitter. The splitter directs at least a portion of the wavelength-selected light that propagates back toward the splitter, into the output port, as output light.

Optical bandpass filter based on reflective devices

A waveguide mode expander couples a smaller optical mode in a semiconductor waveguide to a larger optical mode in an optical fiber. The waveguide mode expander comprises a shoulder and a ridge. In some embodiments, the ridge of the waveguide mode expander has a plurality of stages, the plurality of stages having different widths at a given cross section.

Waveguide mode expander having non-crystalline silicon features

A modulator and a capacitor are integrated on a semiconductor substrate for modulating a laser beam. Integrating the capacitor on the substrate reduces parasitic inductance for high-speed optical communication.

On-chip high capacitance termination for transmitters

A method of fabricating a waveguide mode expander includes providing a substrate including a waveguide, bonding a chiplet including multiple optical material layers in a mounting region adjacent an output end of the waveguide, and selectively removing portions of the chiplet to form tapered stages that successively increase in number and lateral size from a proximal end to a distal end of the chiplet. The first optical material layer supports an input mode substantially the same size as a mode exiting the waveguide. One or more of the overlying layers, when combined with the first layer, support a larger, output optical mode size. Each tapered stage of the mode expander is formed of a portion of a respective layer of the chiplet. The first layer and the tapered stages form a waveguide mode expander that expands an optical mode of light traversing the chiplet.

Integrated photonics mode expander

A tunable laser has a first mirror, a second mirror, a gain medium, and a directional coupler. The first mirror and the second mirror form an optical resonator. The gain medium and the directional coupler are, at least partially, in an optical path of the optical resonator. The first mirror and the second mirror comprise binary super gratings. Both the first mirror and the second mirror have high reflectivity. The directional coupler provides an output coupler for the tunable laser.

Tunable laser with directional coupler

An optical receiver, used in wavelength-division multiplexing, has multiple photodetectors per channel. The optical receiver comprises a demultiplexer to separate incoming light into different output waveguides, one output waveguide for each channel. A splitter is used in each output waveguide to split each output waveguide into two or more branches. A separate photodetector is coupled with each branch so that two or more photodetectors are used to measure each channel.

Broadband high-speed wavelength-division multiplexed receiver using multiple photodetectors per channel

The present invention includes an optical waveguide with a grating and a method of making the same for increasing the effectiveness of the grating. In one example, the grating is at least partially covered by a liner layer disposed on at least a portion of a grating; and a cover layer disposed on the liner layer, wherein a first material selected for the core and ridges and a second material selected for the liner layer are selected to provide a difference in the index of refraction between the first and second material that is sufficient to provide a contrast therebetween.

Enhanced coupling strength grating having a cover layer

Method of making an enhanced coupling strength grating having a cover layer

A 400 Gb/s transmitter is integrated on a silicon substrate. The transmitter uses four gain chips, sixteen lasers, four modulators to modulate the sixteen lasers at 25 Gb/s, and four multiplexers to produce four optical outputs. Each optical output can transmit at 100 Gb/s to produce a 400 Gb/s transmitter. Other variations are also described.

High-speed optical transmitter with a silicon substrate

Growing community of inventors

San Diego, CA, United States of America

Guoliang Li