Fiber Laser Optical Feedback for Contaminant Ignition Shutdown
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Fiber lasers used in surgery face issues with overheating and device failure due to contamination, which can lead to ignition and risk patient harm, as contaminants can reach high temperatures and rapidly melt the laser fiber.
Innovation Solution
A laser device configured to detect contaminant ignition using broadband light produced by ignited contaminants, featuring a laser source, optical waveguide, and control circuitry with a photodetector and comparator to quickly shut down the laser beam when ignition is detected, preventing damage to the device and ensuring patient safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If fiber lasers are used in surgery with high power output, then surgical precision and flexibility are improved, but contamination ignition risk increases causing device failure and patient harm
Solution Approach 1:
The system performs preliminary detection of contamination ignition by monitoring for broadband light emission before the contamination can cause catastrophic damage. The photodetector continuously monitors the optical waveguide for signs of ignition, enabling early intervention before the high power laser causes device failure or patient harm.
Solution Approach 2:
The system implements feedback control by using the photodetector to detect broadband light from ignited contaminants and automatically shutting down the laser source through control circuitry. This closed-loop feedback mechanism prevents contamination ignition from escalating into device failure while maintaining safe operation during normal surgical procedures.
2Productivity
If fiber lasers operate continuously during surgery, then surgical productivity is improved, but overheating and contamination ignition risk increase
Solution Approach 1:
The system rushes through the critical detection phase by using a photodetector that immediately identifies broadband light emission from ignited contaminants. This rapid detection capability allows the system to quickly shut down the laser, minimizing the time window during which high temperatures could cause overheating or device failure while maintaining continuous operation during normal surgery.
Solution Approach 2:
The system replaces thermal monitoring mechanisms with optical detection. Instead of using temperature sensors or thermal cameras to monitor fiber temperature, the system uses a photodetector to detect the optical signature (broadband light emission) of ignited contaminants, providing faster and more reliable detection without the limitations of thermal measurement methods.
3Measurement precision
If contamination detection is implemented using infrared light, then early detection capability is improved, but false alarms increase due to normal laser heating
Solution Approach 1:
The system detects contamination ignition by monitoring for changes in the spectral characteristics of emitted light. Ignited contaminants produce broadband light emission that differs spectrally from the monochromatic laser light, allowing the photodetector to distinguish between normal laser operation and contamination ignition based on the optical signature (color/spectrum) of the emitted light.
Solution Approach 2:
The system converts the harmful effect of contamination ignition (broadband light emission) into a beneficial detection signal. The same broadband light that indicates dangerous contamination ignition is also the detection mechanism, allowing the system to use the harmful phenomenon itself as the signal for early warning and automatic shutdown.
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 solution effectively prevents damage to the fiber laser and ensures patient safety by rapidly detecting contaminant ignition and shutting down the laser beam, minimizing the risk of overheating and device failure during surgical procedures.
Implementation Method 1
The optical waveguide is further configured to emit light at the first end after receiving the light at the second unit
Implementation Method 2
The control circuitry includes a photodetector and a comparator. The control circuitry is configured to detect an amount of light received at the photodetector
Implementation Method 3
A laser device includes a laser source, an optical waveguide (e.g., an optical fiber), and control circuitry. The laser source is configured to emit a laser beam
Data Source
AI summary
The present disclosure relates to a laser device configured to detect material contamination and respond accordingly, thereby minimizing contaminant ignition and damage resulting therefrom. The laser device includes a laser source, an optical waveguide with first and second ends, and control circuitry that includes a photodetector and a comparator. The optical waveguide is configured to transmit a laser beam received from the laser source and further configured to receive light caused by contaminant ignition. The control circuitry is configured to detect an amount of said light after it is received by the optical waveguide, transmitted therethrough, and finally received at the photodetector. The control circuitry is further configured to determine whether the amount of light satisfies a shutdown threshold and then cause the laser source to stop emitting the laser beam if the shutdown threshold is satisfied.