Integrated Optical Chip for Multimode Fiber Wavefront Pre-Compensation
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Solution Overview
Problem
Existing optical transmission systems face challenges in efficiently and accurately adjusting optical parameters for multimode fiber communication, leading to degradation and reduced communication quality due to the complexity and space requirements of wavefront shaping using spatial light modulators and multiple optical devices.
Innovation Solution
An integrated optical transmission chip with intensity, phase, time delay, and polarization regulation and control units on a single substrate, utilizing thermo-optic effects and Bragg gratings, to efficiently and accurately adjust optical parameters for multimode transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wavefront shaping is performed using spatial light modulators and multiple optical devices in free light space, then pre-compensation effect is improved, but device complexity and occupied space increase significantly
Solution Approach 1:
The patent integrates multiple optical regulation functions (intensity, phase, time delay, and polarization control) into a single integrated chip structure. This merging of previously separate optical devices into one compact platform reduces device complexity while maintaining the pre-compensation capability for multimode fiber transmission degradation.
Solution Approach 2:
The patent replaces the mechanical/free-space optical system with an on-chip integrated system using thermo-optic effects and Bragg gratings. This substitution eliminates the need for complex free-light-space optical components and achieves more compact, controllable wavefront shaping for pre-compensation.
2Reliability
If wavefront shaping is performed using spatial light modulators and multiple optical devices, then pre-compensation effect is improved, but occupied space increases
Solution Approach 1:
The patent integrates multiple optical regulation functions (intensity, phase, time delay, and polarization control) into a single integrated chip structure. This merging of previously separate optical devices into one compact platform reduces device complexity while maintaining the pre-compensation capability for multimode fiber transmission degradation.
Solution Approach 2:
The patent replaces the mechanical/free-space optical system with an on-chip integrated system using thermo-optic effects and Bragg gratings. This substitution eliminates the need for complex free-light-space optical components and achieves more compact, controllable wavefront shaping for pre-compensation.
3Ease of operation
If traditional optical devices are used for adjusting optical parameters, then adjustment capability is achieved, but efficiency and accuracy are insufficient
Solution Approach 1:
The patent employs dynamic control mechanisms including thermo-optic effects for real-time intensity and phase modulation, and electrically tunable Bragg gratings for dynamic time delay adjustment. These dynamic elements enable efficient and accurate optical parameter adjustment by allowing rapid reconfiguration without mechanical movement.
Solution Approach 2:
The patent replaces mechanical/free-space optical systems with on-chip integrated systems using thermo-optic effects and electrically tunable Bragg gratings. This substitution enables more efficient and accurate control through electrical signaling rather than mechanical adjustment, achieving faster response times and finer control precision.
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
The integrated chip reduces space, cost, and improves pre-compensation effects, ensuring high communication quality by dynamically adjusting optical parameters in real-time to compensate for mode degradation.
Implementation Method 1
the intensity regulation and control unit is configured as an on-chip adjustable light attenuation structure based on a thermo-optic effect
Implementation Method 2
the phase regulation and control unit is configured as an on-chip phase shifter based on the thermo-optic effect
Implementation Method 3
the time delay regulation and control unit is arranged as an on-chip structure based on a Bragg grating (BG)
Implementation Method 4
the polarization regulation and control unit comprises an on-chip directional coupler and a two-dimensional grating
Data Source
AI summary
The invention relates to field of optical chips. An optical transmission chip being used for wavefront shaping of multimode transmission optical fibers, includes intensity regulation and control unit, phase regulation and control unit, time delay regulation and control unit and polarization regulation and control unit, which are all integrated on same substrate, and cascaded according to preset sequence. The intensity regulation and control unit is connected with light input unit. The polarization regulation and control unit is connected with light output unit. A number of light output units is N, N is positive integer. Modulation of intensity, phase, time delay and polarization of optical modes is realized by utilizing integrated design method, pre-compensation of optical modes is effectively realized in multimode transmission system, and signal quality of multimode transmission system is improved. The optical chip has advantages of being low in cost, good in stability and high in integration level.