Fourier Transform Spectrometer Waveguide Delay Element
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Solution Overview
Problem
Existing spectrometers face challenges in achieving high spectral resolution and compact size, which are essential for space applications and situations requiring stability.
Innovation Solution
The development of a Fourier Transform Spectrometer (FTS) system that incorporates a waveguide and a delay element, allowing for a high spectral resolution of over 100,000 in the visible/near-infrared spectrum, while being compact enough to be integrated on a photonic chip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional FTS systems are used to achieve high spectral resolution, then measurement precision is improved, but device size increases
Solution Approach 1:
The patent implements nested waveguide structures where multiple waveguides are integrated within a compact footprint, allowing the optical path to be folded and extended without proportionally increasing the device area. This nesting approach enables high spectral resolution while maintaining a compact form factor suitable for space applications.
Solution Approach 2:
The patent transitions from traditional linear optical paths to two-dimensional waveguide networks, where light propagates through multiple dimensions of integration. This dimensional transformation allows the spectrometer to achieve the required optical path length for high resolution without linearly increasing the device footprint.
2Adaptability or versatility
If the spectrometer size is reduced for space applications, then adaptability is improved, but spectral resolution may deteriorate
Solution Approach 1:
The patent merges multiple functional components (waveguides, delay elements, interferometers) into a single integrated photonic chip. This consolidation allows the spectrometer to maintain high spectral resolution while achieving the compact size and robustness required for space applications, thereby improving adaptability without sacrificing measurement precision.
3Reliability
If more stability is required for deployed applications, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent replaces traditional mechanical interferometer components with integrated photonic waveguide structures. This substitution eliminates moving parts and mechanical complexity while maintaining or improving stability through the inherent robustness of solid-state photonic integrated circuits, thereby improving reliability without increasing device complexity.
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 enables precise measurements and addresses the limitations of traditional FTS systems by achieving high spectral resolution and compactness, making it suitable for space applications and other stability-critical environments.
Implementation Method 1
a waveguide and a delay element... a first waveguide is coupled to a first delay element, and a second waveguide is coupled to a second delay element
Implementation Method 2
a first delay element... a second delay element... causing a first time delay to the first optical signal... causing a second time delay to the second optical signal
Implementation Method 3
the first output optical signal and the second output optical signal are combined at an interferometer
Data Source
AI summary
Systems and methods for spectrometry are disclosed. In some embodiments, the system comprises a Fourier Transform Spectrometer (FTS) comprising a waveguide and a delay element. In some embodiments, the method comprises determining a power spectral density of an input optical signal via the FTS.