Laser Pump Regulation via Feedback Control
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Solution Overview
Problem
Laser systems with multiple laser lines face challenges in synchronizing pulses due to different build-up times, leading to random and unoptimized nonlinear conversion, which is difficult to control without mechanical adjustments that increase costs and introduce inaccuracies.
Innovation Solution
A laser system with a regulation system comprising a comparator, control system, and optimization system that adjusts the intensity of pump sources to synchronize the build-up times of individual laser pulses, using active Q-switches and nonlinear conversion elements to optimize pulse overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If mechanical systems are used to change the focal point of pump sources, then pulse overlap can be regulated, but system cost increases and mechanical inaccuracies are introduced
Solution Approach 1:
The patent replaces mechanical focus adjustment systems with an electronic control system that uses Q-switches to regulate pulse overlap. Instead of physically moving lenses or mirrors to change focus, the system electronically controls the timing and intensity of pump pulses to achieve optimal overlap, thereby eliminating mechanical inaccuracies and reducing system complexity and cost.
Solution Approach 2:
The patent changes the timing parameters of pump pulses rather than physical parameters like focal length. By adjusting the temporal characteristics of pump pulses through electronic control of Q-switches, the system achieves pulse overlap regulation without mechanical adjustments, resolving the contradiction between precision and complexity.
2Manufacturing precision
If mechanical translation of laser elements is used to change cavity mode, then pulse overlap can be optimized, but system cost increases and alignment accuracy deteriorates
Solution Approach 1:
The patent replaces mechanical translation of laser elements with electronic control of pump pulse timing. Instead of physically moving laser elements to change cavity modes, the system uses electronic signals to control Q-switches, which regulate the pump pulses to achieve optimal pulse overlap. This substitution eliminates mechanical complexity and improves alignment stability.
3Ease of operation
If multiple Q-switches with variable electronic delay are used, then pulse overlap can be controlled, but system complexity and cost increase
Solution Approach 1:
The patent merges the functions of multiple Q-switches into a single Q-switch that is electronically controlled to regulate pump pulses for multiple laser lines. By combining the pulse control functionality into one device with electronic timing control, the system achieves pulse overlap regulation without the complexity and cost of multiple separate Q-switches and delay lines.
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 system enables optimized pulse overlap and efficient nonlinear conversion by regulating the intensity of pump sources, reducing costs and mechanical inaccuracies, and allowing for precise control of pulse synchronization.
Implementation Method 1
they can be pulsed by periodically changing the so-called Q-factor of the cavity of the laser by modulating the losses in the cavity. This can be achieved by using a so-called Q-switch.
Implementation Method 2
regulate the focus of the emitted light from the pump source in the laser element
Implementation Method 3
lasing means for emitting radiation by being appropriately pumped
Implementation Method 4
sum frequency generation or another form of nonlinear conversion
Data Source
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AI summary
A laser system according to the invention comprises pump generating means (xO2, xO3) for generating at least a first and a second, preferably focused, pump beam, and lasing means (xO6, xO7) for emitting radiation by being appropriately pumped. The lasing means (xO6, xO7) is disposed in a first resonator so as to receive the first pump beam in order to generate a first beam (x21) having a first frequency, and the lasing means (xO6, xO7) is disposed in a second resonator so as to receive the second pump beam in order to generate a second beam (x22) having a second frequency. At least one Q-switch (xO8; x17, x18) is disposed in the first and the second resonator, so that the first beam and the second beam both pass a Q-switch (xO8; x17, x18). The laser system (x01 ) has an output (x13) generated from said first beam (x21) and said second beam (x22), and at least a part of said output (x13) is fed back to a regulation system (x14), said regulation system (x14) controlling said pump generating means (xO2, xO3).