Xilinx, Inc.

Chuan Xie

Mayank Raj

Yohan Usthavia Frans

Parag Upadhyaya

Zhaowen Wang

Sandeep Kumar

Suresh Ramalingam

Adebabay M Bekele

Stanley Yuanshih Chen

Sukruth Pattanagiri Giriyappa

Kun-Yung Chang

Gamal Refai-Ahmed

Zhaoyin D Wu

Sukruth Pattanagiri

Ping Chuan Chiang

Ken Chang

Muqseed Mohammad

Some examples described herein provide for controlling output modulation amplitude for optoelectronic devices. In an example, a method includes transmitting a data pattern to an optical modulator device. The method also includes identifying, for each heater control value of a plurality of heater control values for a heater thermally coupled with the optical modulator device, an optical modulation amplitude corresponding to the heater control value based on a corresponding photodiode current value identified while transmitting the data pattern. The method also includes determining a maximum optical modulation amplitude for the optical modulator device based on a plurality of optical modulation amplitudes corresponding to the plurality of heater control values according to the identifying. The method also includes controlling the heater based at least in part on the determined maximum optical modulation amplitude that has been modified according to scaling maximum photodiode current values.

Methods and apparatuses for wavelength locking for optical wavelength division multiplexed micro-ring modulators

Some examples described herein provide for controlling output modulation amplitude for optoelectronic devices. In an example, a method includes transmitting a first data pattern to an optical modulator device. The method also includes determining, while transmitting the first data pattern and for each heater control value of a plurality of heater control values for a heater, a photodiode current value associated with the optical modulator device to generate a plurality of photodiode current values corresponding to the plurality of heater control values. The method also includes determining a maximum optical modulation amplitude for the optical modulator device based at least in part on the plurality of photodiode current values corresponding to the plurality of heater control values. The method also includes controlling the heater for the optical modulator device based on the maximum optical modulation amplitude.

Methods and apparatuses for maximizing output modulation amplitude for optical wavelength division multiplexed micro-ring modulators

An integrated circuit (IC) device includes a controller circuitry having an input coupled to a photodiode of an optoelectronic circuitry and an output coupled to a heater of the optoelectronic circuitry, the controller circuitry configured to determine a center frequency of the optoelectronic circuitry based on a shape of an input signal received from the photodiode, and provide a heater signal to the heater based on the shape of the input signal and the center frequency of the optoelectronic circuitry.

Circuits and methods for wavelength locking of optical receiver WDM filters

Some examples described herein provide for a heterogeneous integration module (HIM) that includes a thermal management apparatus. In an example, an apparatus (e.g., a HIM) includes a wiring substrate, a first component, a second component, and a thermal management apparatus. The first component and the second component are communicatively coupled together via the wiring substrate. The thermal management apparatus is in thermal communication with the first component and the second component. The thermal management apparatus has a first thermal energy flow path for dissipating thermal energy generated by the first component and has a second thermal energy flow path for dissipating thermal energy generated by the second component. The first thermal energy flow path has a lower thermal resistivity than the second thermal energy flow path.

Heterogeneous integration module comprising thermal management apparatus

Disclosed herein is an optical filter configured for wavelength division and multiplexing capable of transmitting and receiving signals. The optical filter includes an optical waveguide configured to receive at an input multiple signals with different wavelengths. The optical filter includes a plurality of channels coupled at different locations along a length of the optical waveguide. Each of the plurality of channels is configured to transmit a respective one of the multiple signals. A number of ring filter stages in a first channel of the plurality of channels that is closer to the input of the optical waveguide is greater than a second channel in the plurality of channels further away from the input of the optical waveguide.

Optical filter having a tapered profile

An improved chip package, and methods for fabricating the same are provided that utilize two tier packaging of an optical die and another die commonly disposed over a substrate. In one example, a chip package is provided that includes an optical die, a core die, and an electrical/optical interface die are all disposed over a common substrate. In one example, a first routing region is provided between the core and electrical/optical interface dies, a second routing region is provided between the electrical/optical interface die and the optical dies, and a third routing region is disposed between the substrate and the core and electrical/optical interface dies.

Integrated electrical/optical interface with two-tiered packaging

Examples described herein generally relate to a temperature-locked loop for optical elements. In an example, a device includes a controller and a digital-to-analog converter (DAC). The controller includes a DC-controllable transimpedance stage (DCTS), a slicer circuit, and a processor. The DCTS is configured to be coupled to a photodiode. An input node of the slicer circuit is coupled to an output node of the DCTS. The processor has an input node coupled to an output node of the slicer circuit. The DAC has an input node coupled to an output node of the processor and is configured to be coupled to a heater. The processor is configured to control (i) the DCTS to reduce a DC component of a signal on the output node of the DCTS and (ii) an output voltage on the output node of the DAC, both based on a signal output by the slicer circuit.

Temperature-locked loop for optical elements having a temperature-dependent response

An apparatus and method for generating a dense wavelength division and multiplexing (DWDM) optical stream in a photonic integrated circuit (PIC) is disclosed. An optical input source including a number (N) of optical channels (wavelengths) may be separated (de-interleaved) into multiple optical streams, each including a corresponding subset of the optical channels of the optical input source. Each of the multiple split optical streams may be modulated with an associated set of data streams by silicon-based micro-ring modulators to generate a corresponding modulated optical stream. A first pair of the modulated optical streams may be combined (interleaved) to generate a first optical output stream including N/2 modulated optical channels, and a second pair of the modulated optical streams may be combined (interleaved) to generate a second optical output stream including N/2 modulated optical channels. The channel spacing of the first and second optical output streams may be twice the channel spacing of the optical input source.

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Fremont, CA, United States of America

Chuan Xie