Passive Q-Switched Laser Timing Control With Emission Feedback
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Solution Overview
Problem
There is a need for a technology that can control the emission of a laser beam with high accuracy in passive Q switching laser devices, as existing methods struggle to synchronize the frequency and timing of optical pulses effectively.
Innovation Solution
A passive Q switching laser device comprising an excitation light source, a resonator, a signal source, a modulation unit, and a power source unit, where the drive signal for the excitation light source is modulated based on the emission timing of the oscillation light to control the emission of the laser beam accurately, using a detection unit and modulator circuit to adjust the pulse signal and prevent excess excitation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the drive signal for the excitation light source is modulated based on emission timing of oscillation light, then the accuracy of laser beam emission control is improved, but the device complexity increases due to addition of modulation unit and detection unit
Solution Approach 1:
The patent implements feedback control by detecting the emission timing of oscillation light and using this information to modulate the drive signal for the excitation light source. The detection unit monitors when oscillation light is emitted, and this timing information feeds back to the modulation unit, which adjusts subsequent drive signals to maintain precise emission timing control.
Solution Approach 2:
The system uses the oscillation light emission timing detected by the detection unit to automatically adjust its own drive signal timing. The modulation unit modifies the drive signal based on the actual emission timing, enabling the system to self-correct and maintain synchronization without external intervention.
2Measurement precision
If the emission timing of oscillation light is monitored and used to modulate drive signal, then the synchronization accuracy is improved, but the loss of time increases due to detection and modulation processing
Solution Approach 1:
The patent applies preliminary action by detecting the emission timing of oscillation light and using this information to pre-modulate the drive signal for the next excitation cycle. By preparing the modulated drive signal in advance based on detected timing, the system minimizes processing delays and ensures synchronization is maintained without significant time loss.
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 solution enables precise control of laser beam emission, preventing deviations in timing and excess excitation, thereby improving the accuracy and efficiency of laser processing by synchronizing the emission with the desired target timing.
Implementation Method 1
a photodetector that receives part of the oscillation light split by the splitting element, converts the received part into a signal, and outputs the converted signal as the detection signal
Data Source
AI summary
A passive Q switching laser device according to an embodiment of the present technology includes: a passive Q switching laser; a signal source; a modulation unit; and a power source unit. The passive Q switching laser includes an excitation light source that emits excitation light, and a resonator that is excited by the excitation light to emit oscillation light. The signal source outputs a drive signal for driving the excitation light source. The modulation unit modulates, on the basis of emission timing at which the oscillation light is emitted from the passive Q switching laser, the drive signal output from the signal source. The power source unit drives, on the basis of the drive signal modulated by the modulation unit, the excitation light source to emit the excitation light.