Layered Silicon Photonics With Feedback Control for Low-Loss Integration

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Solution Overview

Problem

Existing technologies face challenges in integrating photonic components, optoelectronics, and control electronics monolithically into a single chip, leading to issues such as increased footprint, optical and electronic loss, latency, vibration, and noise injection, particularly in cryogenic operations.

Innovation Solution

The integration of a photonic layer and a monitoring-control layer on a silicon substrate with CMOS control circuitry, utilizing silicon-based diodes and optical loop-backs, waveguides, and directional couplers for real-time monitoring and feedback control, enabling on-chip multiplexing and modulation of optical signals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If photonic components, optoelectronics, and control electronics are integrated monolithically into a single chip, then system complexity is reduced and space utilization is optimized, but optical loss and electronic loss increase

Engineering Contradiction:

Improvesystem complexityVSAvoidoptical loss and electronic loss

Core Design Contradiction:

Device complexityVSLoss of energy

Solution Approach 1:

The patent divides the monolithic chip into distinct functional layers: a photonic layer for optical components, an optoelectronic layer for signal conversion, and a control electronics layer for processing. This segmentation allows each layer to be optimized independently, reducing optical and electronic loss while maintaining integration benefits.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces intermediary components such as optical waveguides, directional couplers, and optoelectronic converters that facilitate efficient signal transfer between layers. These intermediaries minimize optical loss by providing low-loss transmission paths and reduce electronic loss through optimized signal conversion interfaces.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Area of stationary object

If photonic components, optoelectronics, and control electronics are integrated monolithically into a single chip, then footprint is reduced, but optical loss and latency increase

Engineering Contradiction:

ImprovefootprintVSAvoidoptical loss

Core Design Contradiction:

Area of stationary objectVSLoss of energy

Solution Approach 1:

The patent transitions from planar integration to three-dimensional layered integration, stacking photonic, optoelectronic, and control electronics layers vertically. This dimensional change reduces footprint while minimizing optical loss by keeping optical paths short and using vertical coupling structures with high efficiency.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Reliability

If photonic components, optoelectronics, and control electronics are integrated monolithically into a single chip, then manufacturing precision requirements increase, but system reliability improves

Engineering Contradiction:

Improvesystem reliabilityVSAvoidmanufacturing precision requirements

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent segments the monolithic chip into separate manufacturable layers that can be fabricated using standard CMOS and photonic fabrication processes independently, then bonded together. This reduces manufacturing precision requirements for each individual layer while achieving high system reliability through integrated operation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs intermediary bonding layers and alignment structures that facilitate precise registration between layers during assembly. These intermediaries compensate for manufacturing tolerances and reduce the overall precision requirements while maintaining reliable optical and electrical connections.

Inventive Principle:

Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This integration minimizes optical and electronic loss, reduces latency and noise, optimizes space utilization, and enhances system reliability by providing real-time feedback and control, reducing manufacturing and maintenance costs.

Implementation Method 1

an optical modulator configured to encode one or more signal characteristics of the electrical drive signals onto an optical carrier

Methodology Applied

Scientific EffectOptical modulation: Phase Modulation

Implementation Method 2

a detector configured to read the encoded one or more signal characteristics

Methodology Applied

Scientific EffectOptical detection: Photoelectric Effect

Implementation Method 3

waveguides

Methodology Applied

Scientific EffectTotal internal reflection: Total Internal Reflection

Implementation Method 4

directional couplers

Methodology Applied

Scientific EffectEvanescent coupling:

Data Source

PatentUS20260063929A1Integrated electonics and photonics systems

Publication Date: 2026.03.05 QUANTINUUM LLC

AI summary

A confinement apparatus system comprises a photonic layer. The photonic layer comprises optical elements. At least one of the optical elements is configured to output an optical signal. The confinement apparatus system further comprises a monitoring-control layer. The monitoring-control layer comprises at least one of monitoring circuitry or feedback control circuitry.