Dual-Mode Receiver With Integrated Dispersion Compensators
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Solution Overview
Problem
Integrated photonics receivers face issues with incomplete absorption of optical light, leading to degraded optical return loss and the need for costly active phase control algorithms for polarization mode tuning.
Innovation Solution
A dual-mode integrated photonics receiver design featuring two parallelly connected photodetectors with integrated dispersion compensators, eliminating the need for phase tuners and combiners, and utilizing a digital signal processor for autonomous dispersion tuning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single photodetector with polarization splitter rotator is used, then the receiver can perform optical-to-electrical conversion, but optical light is not fully absorbed and degrades optical return loss
Solution Approach 1:
The single photodetector is segmented into two separate photodetectors (first photodetector and second photodetector), each receiving different polarization modes (TE and TM) through separate waveguide paths. This segmentation allows each photodetector to fully absorb its assigned polarization mode without reflection, resolving the optical return loss degradation issue while maintaining complete optical energy conversion.
2Reliability
If phase control algorithms and phase tuners are used, then polarization modes can be combined constructively, but manufacturing costs and operational complexity increase
Solution Approach 1:
The phase control algorithms and active phase tuning mechanisms are completely extracted from the system. Instead of using complex feedback control to adjust phase, the invention uses a static polarization splitter rotator configuration that passively separates and recombines polarization modes through fixed optical paths, eliminating the need for costly and complex active control systems while maintaining signal combining efficiency.
Solution Approach 2:
The polarization splitter rotator and waveguide structure perform automatic polarization mode separation and combination without requiring external control algorithms. The system self-adjusts through its inherent optical properties, where the polarization splitter naturally directs TE and TM modes to appropriate photodetectors based on their polarization state, eliminating the need for active phase control.
3Ease of manufacture
If traditional receiver design is used, then manufacturing is simpler, but optical signal clarity is reduced and return loss degrades
Solution Approach 1:
The invention applies local quality by creating distinct, dedicated optical paths for different polarization modes (TE and TM) through separate waveguide structures. Each photodetector receives a specific polarization mode through its own optimized waveguide path, ensuring maximum absorption efficiency and signal clarity for each mode while maintaining overall system manufacturability through modular integration.
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 design enhances optical signal clarity, reduces manufacturing and operational costs, and enables extensive dispersion tuning for improved data transmission reach.
Implementation Method 1
a polarization manipulation device optically connected to one of the at least one optical input port, the polarization manipulation device being adapted to split an optical signal into a first and a second optical signals
Implementation Method 2
a first and a second dispersion compensators each optically connected to the polarization manipulation device, the first and the second dispersion compensators each being adapted to selectively induce a dispersion on an optical signal propagating through the dispersion compensator
Implementation Method 3
a first and a second photodetectors optically connected to the first and the second dispersion compensators, respectively
Data Source
AI summary
An integrated receiver chip comprising: a first end and a second end; at least one optical input port disposed at the first end; a polarization manipulation device optically connected to one of the at least one optical input port, the polarization manipulation device being adapted to split an optical signal into a first and a second optical signals; a first and a second dispersion compensators each optically connected to the polarization manipulation device, the first and the second dispersion compensators each being adapted to selectively induce a dispersion on an optical signal propagating through the dispersion compensator; and a first and a second photodetectors optically connected to the first and the second dispersion compensators, respectively.