Quantum Absorption Spectroscopy with Phase-Aligned Interferogram Integration
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Solution Overview
Problem
Existing quantum absorption spectroscopy methods face challenges in achieving accurate measurement due to deviations in optical path length and wavelength dispersion caused by optical elements and sample interactions, leading to reduced measurement accuracy.
Innovation Solution
A quantum absorption spectroscopy system and method that includes a quantum optical system, photodetector, and processor to manage quantum interference phases, apply processing to reduce phase differences, and spatially integrate interferograms to enhance measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If quantum absorption spectroscopy uses a photodetector with multiple pixels to detect signal photons, then the measurement coverage and signal detection capability are improved, but phase differences arise among the pixels due to optical path length variations and wavelength dispersion, degrading measurement precision
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the phase of quantum interference between different physical processes that generate quantum entangled photon pairs. The quantum optical system modifies phase parameters to compensate for optical path length differences and wavelength dispersion effects, ensuring consistent phase relationships across multiple photodetector pixels. This enables accurate interferogram integration while maintaining the enhanced detection capability provided by multiple pixels.
2Adaptability or versatility
If the optical system includes multiple optical elements (mirrors, lenses) to control light paths, then the functionality and flexibility of the system are improved, but wavefront deviation and alignment sensitivity increase, causing phase errors in the interferogram
Solution Approach 1:
The patent implements feedback mechanisms where the quantum optical system continuously monitors and adjusts the phase of quantum interference based on detected phase variations. By using the detected signal photons to feedback information about phase deviations caused by wavefront distortion and misalignment, the system can dynamically compensate for these errors, maintaining measurement precision despite the complexity of multiple optical elements.
3Power
If the system integrates interferograms from multiple pixels to improve signal strength, then the measurement sensitivity is improved, but phase differences among pixels cause destructive interference and signal cancellation
Solution Approach 1:
The patent changes phase parameters dynamically to ensure constructive interference across all photodetector pixels during integration. By adjusting the phase of quantum interference, the system transforms potential destructive interference patterns into constructive ones, allowing the interferograms from multiple pixels to add up coherently. This maintains both the signal strength enhancement from multi-pixel integration and the measurement precision required for accurate absorption spectroscopy.
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
Improves measurement accuracy by reducing phase differences and integrating interferograms, resulting in enhanced absorption spectroscopy characteristics of samples.
Implementation Method 1
changing a phase of quantum interference occurring between a plurality of physical processes, in each of which a quantum entangled photon pair of a signal photon and an idler photon is generated
Implementation Method 2
Each of the plurality of pixels detects the signal photon in a state where a sample is disposed in an optical path of the idler photon, and outputs a detection signal from the detected signal photon
Implementation Method 3
when a sample to be measured is installed in the path of the idler light, the idler light may be affected by the deviation of the wavefront of transmission/reflection by the sample and wavelength dispersion by the sample
Data Source
AI summary
The quantum optical system changes a phase of quantum interference occurring between a plurality of physical processes, in each of which a quantum entangled photon pair of a signal photon and an idler photon is generated. Each of a plurality of pixels outputs a detection signal of the signal photon in a state where a sample is arranged in an optical path of the idler photon. A processor calculates an absorption spectroscopy characteristic based on an interferogram indicating a variation in a signal intensity acquired from each of the plurality of pixels in accordance with the change in the phase of the quantum interference. The processor: applies a processing to reduce phase difference of the interferogram among the plurality of pixels; spatially integrates, over the plurality of pixels, the interferogram having gone through the processing to reduce phase differences; and calculates the absorption spectroscopy characteristic based on the integrated interferogram.