Optical Sensing System Pulse Selection for SiPM Saturation
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Solution Overview
Problem
Silicon Photomultiplier (SiPM) detectors tend to saturate quickly, limiting their dynamic range and making them less suitable for applications requiring linear response in optical sensing and communications systems.
Innovation Solution
A sequence of optical pulses with varying magnitudes is used to select a pulse that does not saturate the detector, allowing for optimal signal processing and transmission, thereby extending the dynamic range and preventing early saturation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If SiPM detector uses large number of microcells to increase dynamic range, then dynamic range is improved, but saturation occurs more quickly
Solution Approach 1:
The patent divides the detection process into multiple discrete pulses with different magnitudes. Instead of using a single high-magnitude pulse that may saturate the detector, the system segments the measurement into several lower-magnitude pulses, allowing the detector to operate within its linear range while still gathering sufficient signal information.
Solution Approach 2:
The patent dynamically adjusts the magnitude of optical pulses based on detector response. The system varies pulse magnitudes adaptively, selecting appropriate pulse strengths to avoid saturation while maintaining detection sensitivity. This dynamic approach allows the system to optimize performance based on real-time detector conditions.
2Measurement precision
If SiPM detector operates at high sensitivity with large responsivity, then detection capability is improved, but saturation occurs earlier
Solution Approach 1:
The patent applies partial action by using multiple pulses of moderate magnitude rather than a single excessive-magnitude pulse. Each individual pulse is kept below the saturation threshold, but collectively they provide sufficient signal accumulation for precise measurement. This approach maintains high detection capability while avoiding the harmful effects of excessive single-pulse intensity.
3Power
If single high-magnitude pulse is used for detection, then signal strength is improved, but linear response is lost due to saturation
Solution Approach 1:
The patent employs periodic action by using a sequence of repeated pulses with varying magnitudes. Instead of relying on a single high-power pulse, the system uses multiple periodic pulses, each contributing to the overall signal while maintaining linear detector response. This periodic approach allows signal accumulation over time without sacrificing linearity.
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 approach enables improved signal-to-noise ratio, reduces unwanted saturation, and optimizes transmission energy, providing a linear response even under fluctuating conditions, thus enhancing the performance of SiPM detectors in optical sensing and communications systems.
Implementation Method 1
Silicon Photomultiplier (SiPM) detectors comprise a dense array of small, electrically and optically isolated photon detectors
Data Source
AI summary
An optical system (100) comprising: a transmitter module (102) configured to transmit a sequence of optical pulses (300), each optical pulse in the sequence (300) having a different magnitude to each other optical pulse in the sequence (300); a receiver module (104) comprising one or more optical signal detectors, the receiver module (104) configured to receive the sequence of optical pulses (300) transmitted by the transmitter module (102); and one or more processors (110) configured to process the sequence of optical pulses received by the receiver module (104) to select an optical pulse from the received sequence of optical pulses (400) based on one or more predetermined criteria. The one or more predetermined criteria include a criterion that the selected optical pulse does not saturate the one or more optical signal detectors.