Optical Resonator Converts Phase to Intensity for Multimode Receivers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional optical receivers for complex phase-modulated signals require precise optics, single-mode fibers, and adaptive optics for wavefront correction, making them complex, costly, and inflexible, especially for non-line-of-sight applications and free-space communication.
Innovation Solution
An optical signal receiver using a multimode waveguide and an optical resonator, such as a Fabry-Perot etalon, to convert phase modulations into intensity modulations, eliminating the need for wavefront correction and single-mode fibers, and allowing for detection of complex modulated signals without adaptive optics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional phase modulation receivers are used, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical/optical phase detection systems with a simplified intensity-based detection system. By using an optical resonator to convert phase modulations into intensity modulations, the system substitutes precise phase measurement hardware with standard intensity detectors, thereby reducing device complexity while maintaining detection capability.
Solution Approach 2:
The patent changes the detection parameter from phase to intensity. The optical resonator transforms the phase-modulated optical signal into an intensity-modulated signal, allowing standard photodetectors to recover information without requiring precise phase measurement hardware. This parameter transformation resolves the contradiction by maintaining measurement capability while simplifying the system.
2Measurement precision
If single-mode fiber is used for optical transport, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent substitutes single-mode fiber requirements with multimode fiber compatibility by introducing an optical resonator that converts phase modulations to intensity modulations. This allows standard multimode fibers to be used instead of precision single-mode fibers, reducing optical transport complexity while maintaining signal detection accuracy through the resonator's mode-averaging effect.
3Measurement precision
If adaptive optics are used for wavefront correction, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces adaptive optics wavefront correction systems with a simplified approach using an optical resonator. The resonator's ability to average phase variations across multiple modes eliminates the need for complex wavefront sensing and correction hardware, thereby reducing device complexity while maintaining sufficient measurement precision for communication applications.
Solution Approach 2:
The optical resonator performs self-correction by naturally averaging phase variations across its supported modes. This self-service mechanism eliminates the need for external wavefront correction systems, as the resonator inherently tolerates and averages out wavefront distortions, simplifying the overall system while maintaining detection accuracy.
4Measurement precision
If precision optics are used, then measurement precision is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent substitutes precision optics with standard optical components by using an optical resonator to perform the critical phase-to-intensity conversion. This allows the use of commercially available, less precise optical components while maintaining signal detection accuracy, thereby reducing manufacturing precision requirements and associated costs.
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 solution simplifies the receiver design, reduces costs, and enables efficient detection of complex optical signals in multimode waveguides and free-space environments, maintaining signal fidelity and flexibility in optical communication systems.
Implementation Method 1
an optical resonator that receives the complex modulated optical signal from the waveguide and converts the complex modulated optical signal to an intensity modulated signal
Implementation Method 2
a detector that is configured to convert the intensity modulated signal into an electrical signal
Data Source
AI summary
An optical signal receiver includes a multimode waveguide for receiving a complex modulated optical signal, an optical resonator that receives the complex modulated optical signal from the multimode waveguide and converts the complex modulated optical signal to an intensity modulated signal, and a detector that is configured to convert the intensity modulated signal into an electrical signal, the electrical signal having an amplitude indicative of an intensity of the intensity modulated signal from the optical resonator, and that provides a detected signal.