Filament Waveguide Layout for Low-Loss Slit Spectrometer Input
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Solution Overview
Problem
Conventional electromagnetic spectrometers suffer from high light loss due to inefficient light coupling in optical fibers, as light is confined within the fiber core and the cladding area is lossy, necessitating improved optical arrangements for minimized loss and increased efficiency.
Innovation Solution
A waveguide comprising filaments with a convex envelope at the input end and a slit shape at the output end, each with a core and reflective coating, and optionally embedded in a shaping element, to enhance light transmission and minimize reflection losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional optical fibers are used to convey light, then light can be transmitted through the fiber, but significant light loss occurs because the cladding area is lossy and light coupling is inefficient
Solution Approach 1:
The invention extracts and eliminates the lossy cladding component from conventional optical fibers. By using only the core portion surrounded by reflective coatings instead of traditional cladding, the design removes the source of light loss while maintaining the light-conveying function.
Solution Approach 2:
The invention uses composite structures where transparent core materials (polymers, glasses, crystals, or air) are combined with reflective coatings (metallic or dielectric layers). This composite approach creates a low-loss waveguide that replaces the conventional core-cladding structure.
2Use of energy by moving object
If a round lens is used to collect light from a source, then light can be gathered, but the cylindrically symmetric energy distribution cannot be efficiently converted to a slit-like distribution without additional optical arrangements
Solution Approach 1:
The invention segments the waveguide cross-section into multiple discrete filaments arranged in specific patterns. This segmentation allows the transformation of circular light collection into a slit-like output distribution at the waveguide exit, eliminating the need for additional optical elements.
Solution Approach 2:
The invention uses the spatial arrangement of filaments in the cross-sectional plane to transform the light distribution. By configuring filaments in specific two-dimensional patterns, the system converts circular symmetry into a slit-like one-dimensional distribution without additional optical components.
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 waveguide design significantly improves light transmission efficiency by maintaining light within the core and reducing reflection losses, enabling precise positioning and stable light collimation for enhanced spectral resolution.
Implementation Method 1
each filament comprises a core and a reflective coating, such as a metallic or dielectric coating covering a lateral area of the core
Implementation Method 2
In case of a dielectric coating or also a Bragg coating, layers of coating materials with different refractive indices are disposed on top of each other. This leads to a high degree of reflection, at least within a certain range of wavelength.
Data Source
AI summary
A waveguide for conveying light with an input end and an output end to supply for an electromagnetic spectrometer includes: an input end having a convex envelope of a cross-section of the waveguide at the input end, which envelope defines a circular shape or a shape of a regular polygon with n1 corners, wherein n1 is a natural number bigger than 3; an output end having a cross-section that defines a slit shape; and a plurality of filaments, wherein an arrangement of the plurality of filaments defines the cross-sections at the input and output ends, wherein each filament includes a core and a reflective coating covering a lateral area of the core, wherein the core includes an optically transparent material.