Supercontinuum Spectral Detection with Output Coupling and Speckle Reduction
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Solution Overview
Problem
Existing supercontinuum systems lack effective spectral detection capabilities for supercontinuum light delivered outside the system, requiring cumbersome on-site spectrometer setups and being susceptible to sample interference.
Innovation Solution
A supercontinuum system with a spectrometer integrated to measure the spectrum of light delivered outside the system, using an output-coupler at the final output-end to split the light into an input-signal for spectral monitoring and an output-signal for the external device, combined with a multimode-fiber of optimal length to reduce speckle noise and mechanical perturbations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If spectral detection is performed at the external device or sample level using a spectrometer, then spectral information about delivered supercontinuum light can be obtained, but the setup becomes cumbersome and is susceptible to sample interference
Solution Approach 1:
The system segments the spectral detection function from the external measurement location and integrates it into the supercontinuum system itself via the spectrometer 5. This allows spectral monitoring to be performed separately from the external device/sample setup, reducing on-site complexity while maintaining measurement capability through the delivered supercontinuum light
Solution Approach 2:
The patent introduces an intermediary approach by using the delivered supercontinuum light itself as the measurement probe. Instead of requiring a separate spectrometer setup at the external location, the system uses the light already delivered to the external device/sample to carry spectral information back to the integrated spectrometer 5, eliminating the need for complex on-site spectral measurement equipment
2Loss of information
If spectral detection is performed at the external device or sample level, then spectral information can be obtained, but the measurement is influenced by the sample itself
Solution Approach 1:
The system performs preliminary spectral monitoring by integrating the spectrometer 5 within the supercontinuum system to characterize the delivered light before it interacts with the external sample or device. This preliminary spectral information is obtained without sample interference, allowing the system to establish baseline spectral properties and detect any changes caused by the sample
Solution Approach 2:
The patent employs a copying mechanism where the spectral characteristics of the delivered supercontinuum light are measured and copied by the integrated spectrometer 5. This creates a reference spectral copy that can be compared against measurements taken at the external device, allowing differentiation between light source properties and sample-induced spectral modifications
3Reliability
If a spectrometer is integrated into the supercontinuum system, then spectral detection of delivered light is enabled, but the system complexity increases
Solution Approach 1:
The patent merges the spectral detection function with the existing supercontinuum system by integrating a spectrometer 5 that utilizes the same delivered light path. This combination allows spectral monitoring to be performed using the light already delivered to external devices, verifying fiber connection integrity and light delivery without requiring completely separate measurement equipment
Solution Approach 2:
The integrated spectrometer 5 serves multiple functions: it monitors spectral content of delivered light, verifies proper fiber connection, ensures light delivery quality, and provides diagnostic information about system performance. This multi-functionality reduces the need for separate verification systems while adding comprehensive monitoring capability
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
Enables efficient, reliable spectral detection of supercontinuum light outside the system, ensuring proper fiber connection and performance, and reducing speckle noise for improved accuracy.
Implementation Method 1
the output-coupler is configured to split the supercontinuum-light, or the part thereof, into two separate signals: an output-signal for the external device and an input-signal for the spectrometer
Implementation Method 2
combined with a multimode-fiber of optimal length to reduce speckle noise and mechanical perturbations
Data Source
AI summary
Disclosed is a supercontinuum system for providing supercontinuum light to an external device and/or an external sample, comprising: a supercontinuum-module configured to generate the supercontinuum light; a spectrometer configured to measure a spectrum of the supercontinuum light or a part thereof; a delivery-fiber for delivering the supercontinuum light, or a part thereof, though the delivery-fiber from an initial input-end to a final output-end.