Pockels Cell Driver Segmentation for High Repetition Rate
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Solution Overview
Problem
The maximum permissible repetition rate of Pockels cell drivers is limited by the maximum electric power consumption of high-voltage switches, which restricts the switching speed and efficiency of Pockels cells in pulsed laser systems.
Innovation Solution
A driver configuration is introduced where the switching voltage is shared between two high-voltage switches, reducing the power handling requirement for each switch, allowing higher repetition rates without exceeding the maximum power consumption limit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single high-voltage switch is used to switch the full voltage to the Pockels cell, then the circuit is simple, but the maximum permissible repetition rate is limited by the maximum power consumption of the switch
Solution Approach 1:
The single high-voltage switching task is segmented into two separate switching operations. Two high-voltage switches are used, each switching only half of the total voltage to the Pockels cell. This segmentation reduces the power consumption of each individual switch, allowing the system to operate at higher repetition rates without exceeding the maximum power consumption limit of any single switch.
2Power
If the switching voltage is shared between two high-voltage switches, then the power handling requirement for each switch is reduced, but the device complexity increases
Solution Approach 1:
The voltage switching function is segmented across two switches, with each switch handling only half the total voltage. This reduces the power handling requirement for each switch while maintaining the overall functionality of the Pockels cell driver.
Solution Approach 2:
Two separate switching circuits are merged into a unified driver configuration that works together to control the Pockels cell. The two switches operate in coordination, with their combined effect achieving the full voltage switching requirement while distributing the power handling load.
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 configuration enables the Pockels cell to operate at higher repetition rates while maintaining efficient power usage, effectively increasing the switching speed and efficiency of the Pockels cell.
Implementation Method 1
A Pockels cell with a suitable high-voltage power supply can be used to optically switch, i.e. to tweak the intensity or beam direction of short laser pulses
Data Source
AI summary
The invention relates to an activation circuit for a Pockels cell, comprising a first circuit node (P1), which can be connected to a first connection of the Pockels cell (CP), and a second circuit node (P2), which can be connected to a second connection of the Pockels cell (CP), wherein the first circuit node (P1) is connected by means of a first line to a first electrical potential (HV1) across a first switch (S1B) and by means of a second line to a second electrical potential (HV2) across a second switch (S1A), and the second circuit node (P2) is connected by means of a third line to a third electrical potential (HV3) across a third switch (S2B) and to a fourth electrical potential (HV4) across a fourth switch (S2A), and HV1 is more positive than HV2 and HV3 is more positive than HV4, wherein the difference of the potentials (HV1−HV4) is greater than the difference of the potentials (HV1−HV2) and the difference of the potentials (HV3−HV4).