Laser System Mode-Locked Controller Feedback Stabilization
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Solution Overview
Problem
Existing high power pulsed lasers, relying on techniques like Q-switching and mode locking, have predetermined optical pulse characteristics that cannot be easily varied without compromising performance, making it difficult to regulate the internal status of the laser system and deteriorate laser performance.
Innovation Solution
A laser system comprising an oscillator with a mode locked controller and a spectrum converter, where the spectrum converter uses a wavelength conversion chip to convert laser pulses and a photo-detector to detect power, transmitting a control signal to the mode locked controller when the power is below a threshold, allowing for active modulation of the mode-locked status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If Q-switching and mode locking techniques are used to generate optical pulses, then high power pulsed laser output is achieved, but the optical pulse characteristics become predetermined and cannot be varied without compromising laser performance
Solution Approach 1:
The patent applies dynamics by making the mode-locked status controllable and adjustable through a control signal received by the mode locked controller. This allows the laser system to dynamically change its internal status and regulate optical pulse characteristics (such as pulse width, repetition rate, and shape) in real-time, transforming a static predetermined system into a dynamic adaptable one while maintaining high power output
Solution Approach 2:
The patent implements parameter changes by modifying the mode-locked status parameters of the laser cavity through control signals. The control signal adjusts key parameters including pulse width, pulse repetition rate, and pulse shape, enabling the laser to operate with variable characteristics across different applications while preserving the high power pulsed output generated by Q-switching and mode locking techniques
2Adaptability or versatility
If the internal status of the laser system is varied to achieve different pulse characteristics, then adaptability is improved, but it becomes very difficult to regulate the internal status without deteriorating laser performance
Solution Approach 1:
The patent implements feedback by using a photo-detector to detect the power of the second laser pulses and comparing it with a threshold value. When the detected power is lower than the threshold, a control signal is automatically generated and transmitted to the mode locked controller to adjust the mode-locked status. This closed-loop feedback mechanism enables automatic regulation of internal status parameters, ensuring that pulse characteristics remain within optimal ranges and preventing performance deterioration while providing adaptability
Solution Approach 2:
The patent applies self-service by enabling the laser system to automatically monitor and regulate its own internal status without external manual intervention. The photo-detector continuously monitors the laser pulse power, and the control system automatically adjusts the mode locked controller when deviations are detected, allowing the system to self-correct and maintain stable performance across varying operational conditions
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 the active and automatic stabilization of laser pulses, enhancing the performance of the outputted laser pulses without manual intervention, allowing for a range of variable pulse characteristics.
Implementation Method 1
a wavelength conversion chip configured to convert the first laser pulses into second laser pulses
Implementation Method 2
a photo-detector configured to detect a power of the second laser pulses
Data Source
AI summary
A laser system and a laser outputting method are disclosed. The method comprises: providing a oscillator, wherein the oscillator comprises a pump light source, a cavity and a mode locked controller; utilizing the pump light source to emit a pump light into the cavity; outputting first laser pulses to the spectrum converter; utilizing a wavelength conversion chip of the spectrum converter to convert the first laser pulses to second laser pulses; utilizing at least one photo-detector to detect a power of the second laser pulses; controlling the mode locked controller to modulate a mode-locked status of the cavity when the power of the second laser pulses is lower than a threshold value.