Planar Wavelength Detection Circuit for Shared Multi-Source Sensing
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Solution Overview
Problem
Existing wavelength detection devices are limited in their ability to efficiently detect and share wavelengths from multiple light sources with different output wavelengths, leading to increased size and manufacturing costs.
Innovation Solution
A wavelength detection device incorporating a planar lightwave circuit with waveguides, a multiplexer unit, a filter unit with wavelength-dependent transmittance, and detection units, allowing for the multiplexing and detection of lights with different wavelengths using a shared configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single wavelength detection device is used for multiple light sources with different wavelengths, then device size and manufacturing costs are reduced, but the ability to accurately detect and distinguish different wavelengths becomes more difficult
Solution Approach 1:
The planar lightwave circuit is segmented into multiple waveguides, each configured to guide light of a specific wavelength range. The filter unit is segmented into multiple filter elements with different wavelength-dependent transmittance characteristics. This segmentation allows the single device to handle multiple wavelengths while maintaining detection accuracy through specialized processing paths for each wavelength range.
Solution Approach 2:
The wavelength detection device is designed as a universal platform that can detect multiple wavelengths from different light sources using a single shared planar lightwave circuit. The device achieves multi-functionality by incorporating waveguides and filter units that can process various wavelength ranges, eliminating the need for separate detection devices for each light source while maintaining accurate wavelength discrimination.
2Measurement precision
If separate wavelength detection devices are used for each light source, then wavelength detection accuracy is maintained, but device size and manufacturing complexity increase
Solution Approach 1:
Multiple wavelength detection functions are merged into a single planar lightwave circuit device. The waveguides, multiplexer unit, filter unit, and detection unit are integrated in one compact structure, allowing simultaneous or sequential detection of multiple wavelengths from different light sources without requiring separate detection devices, thereby reducing overall device complexity.
Solution Approach 2:
The device transitions from a three-dimensional stacked configuration to a two-dimensional planar lightwave circuit architecture. This dimensional change allows multiple waveguides and filter elements to be arranged in a flat plane, reducing vertical height and overall device footprint while maintaining the functional complexity needed for multi-wavelength detection.
3Adaptability or versatility
If multiple filter units with different wavelength characteristics are integrated, then the ability to detect multiple wavelengths is improved, but manufacturing precision requirements increase
Solution Approach 1:
The filter unit incorporates multiple filter elements with different wavelength-dependent transmittance characteristics, where each filter element is designed with specific optical parameters tailored to different wavelength ranges. By varying the optical parameters (such as thickness, material composition, and geometric configuration) of each filter element, the device achieves multi-wavelength detection capability while using standardized manufacturing processes for the planar lightwave circuit.
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 device is downsized and reduces manufacturing labor and costs by enabling sharing of components across multiple light sources with different wavelengths, while maintaining accurate wavelength detection.
Implementation Method 1
waveguides configured to guide lights; a multiplexer unit configured to multiplex lights respectively guided through the waveguides
Implementation Method 2
a filter unit to which light output from the multiplexer unit is input, the filter unit having a property of having light transmittance that changes according to wavelength
Implementation Method 3
a detection unit configured to detect intensity of light output from the filter unit
Data Source
AI summary
A wavelength detection device includes: waveguides configured to guide lights; a multiplexer unit configured to multiplex lights respectively guided through the waveguides and having wavelengths different from one another; a filter unit to which light output from the multiplexer unit is input, the filter unit having a property of having light transmittance that changes according to wavelength; and a detection unit configured to detect intensity of light output from the filter unit. The waveguides, the multiplexer unit, and the filter unit are included in a planar lightwave circuit.