HVSW-04 Pockels cell driver
Applications
- Pulse picking
- Cavity dumping
- Regenerative amplifier control
Features
- Up to 4.0 kV output voltage
- Up to 4 MHz repetition rate (at 1.4 kV voltage)
- Up to 1 MHz repetition rate (at 3.2 kV voltage)
- 5-11 ns rise / fall time
- Requires external HV power supply
(e.g. HVPS-300) - Two possible operating modes for base model: short pulse (15-20 ns, fixed width) and long pulse (100-2000 ns, adjustable width)
15-2000 ns pulses for wide range modification
HVSW-04 pulse picker is a dedicated high voltage high repetition rate Pockels cell driver for pico- and femtosecond lasers. It represents a combination of two fast drivers (based on MOSFET technology) in a full-bridge schema. The primary use is for extracting single pulses from a pulse train, pulse picking. (An example of seed laser optical sheme is here)
Using the pulse picker driver one chooses between two operation modes:
- fixed width short pulses (about 15-20 ns), triggered by a leading edge of an external TTL.
- variable width long pulses (adjusted in range of 100-2000 ns typically, other on request), when a leading edge of an external TTL signal cause rise of pulse, and a trailing edge cause pulse fall.
We offer also a wide range driver modification with a continiously adjustable in range of 15-2000 ns pulse width.
The driver requires +24 V DC power supply, a pulse generator to set an operating frequency and pulse width (in variable pulse width mode) and a HV DC bipolar power supply (e.g. HVPS-300). User has a possibility to adjust an output voltage level by using an interface of the HV DC power supply.
The maximum output voltage is 4 kV (bipolar), maximum repetition rate is 0.5-4 MHz (in dependence on output voltage, some target performances are given in the following table):
(*)The values are approximate, exact performance depends on actual load capacitance and cooling conditions.
Please, note that by bipolar device an output pulse voltage U is formed by applying +U/2 to one output wire and –U/2 to other one. Therefore, both output poles are under HV.
Driver is water cooled.
It is possible to control the driver through analogue interface or through RS-485 interface (not simultaneously!). PC software is available for lab purposes.
You may also be interested in:
All-in-one driver | Pulse picker module set | GaN driver |
Input:
Output:
– in fixed pulse width mode
– in variable pulse width mode
to 9-11 ns at the max. voltage (4 kV)
Environment:
Other:
– from overheating
2) these parameters aren’t indepenent and cannot achieve their maximum at the same time
3) these and other parameters might be changed upon request
4) 10-90% level, guaranteed at load capacitance 5-7 pF and below
HVSW-04-XXX-[WR]-[FX], where:
- XXX means voltage modification, might be either 4kV (most standard version) or 2kV (high repetition rate version)
- WR means wide (15-2000ns) pulse width adjustment range (option, please see Manual, p. 11-13 for the details)
- FX means version of the device with fixed polarity of the output pulses (option, please see Manual, p. 11-13 for the details)
Difference between 2kV and 4kV modifications:
Modification | Maximum repetition rate | Maximum voltage | Rise time / fall time |
HVSW-04-4kV-[WR]-[FX] (standard modification, 4kV max) | 1MHz (can be damaged if operated at higher repetition rate) | 4kV (can be damaged if operated at higher voltage) | 9-11ns (at 4kV) |
HVSW-04-2kV-[WR]-[FX] (high repetition rate modification, 2kV max) |
4MHz (can be damaged if operated at higher repetition rate) | 2kV (can be damaged if operated at higher voltage) | 7-9ns (at 2kV) |
Modifications
Model
Description
Base version (4kV):
- Up to 4.0 kV output voltage
- Up to 1 MHz repetition rate (at 3.2 kV voltage)
- 9-11 ns rise / fall time (at 4 kV voltage)
- Short pulse (15-20 ns, fixed) and Long pulse (100‑2000 ns, adjustable) modes of operations, 20‑100 ns range is unavailable
- Polarity of sequential pulses – alternating
High repetition rate version (2kV):
- Up to 2.0 kV output voltage
- Up to 4 MHz repetition rate (at 1.6 kV voltage)
- 7-9 ns rise / fall time (at 2 kV voltage)
- Short pulse (15-20 ns, fixed) and Long pulse (100‑2000 ns, adjustable) modes of operations, 20‑100 ns range is unavailable
- Polarity of sequential pulses – alternating
Version with fixed polarity of the output pulses (4kV):
- Up to 4.0 kV output voltage
- Up to 1 MHz repetition rate (at 3.2 kV voltage)
- 9-11 ns rise / fall time (at 4 kV voltage)
- Short pulse (15-20 ns, fixed) and Long pulse (100‑2000 ns, adjustable) modes of operations, 20‑100 ns range is unavailable
- –
Polarity of sequential pulses – the same
High repetition rate version with fixed polarity of the output pulses (2kV):
- Up to 2.0 kV output voltage
- Up to 4 MHz repetition rate (at 1.6 kV voltage)
- 7-9 ns rise / fall time (at 2 kV voltage)
- Short pulse (15-20 ns, fixed) and Long pulse (100‑2000 ns, adjustable) modes of operations, 20‑100 ns range is unavailable
- Polarity of sequential pulses – the same
HVSW-04-4kV-WR
4kV base version with wide pulse width adjustment range:
- Up to 4.0 kV output voltage
- Up to 1 MHz repetition rate (at 3.2 kV voltage)
- 9-11 ns rise / fall time (at 4 kV voltage)
- Continuously adjustable pulse width in 15-2000 ns range
- Polarity of sequential pulses – alternating
High repetition rate version with wide pulse width adjustment range (2kV):
- Up to 2.0 kV output voltage
- Up to 4 MHz repetition rate (at 1.6 kV voltage)
- 7-9 ns rise / fall time (at 2 kV voltage)
- Continuously adjustable pulse width in 15-2000 ns range
- Polarity of sequential pulses – alternating
4kV base version with wide pulse width adjustment range and fixed polarity of the output pulses:
- Up to 4.0 kV output voltage
- Up to 1 MHz repetition rate (at 3.2 kV voltage)
- 9-11 ns rise / fall time (at 4 kV voltage)
- Continuously adjustable pulse width in 15-2000 ns range
- Polarity of sequential pulses – the same
High repetition rate version with wide pulse width adjustment range and fixed polarity of the output pulses (2kV):
- Up to 2.0 kV output voltage
- Up to 4 MHz repetition rate (at 1.6 kV voltage)
- 7-9 ns rise / fall time (at 2 kV voltage)
- Continuously adjustable pulse width in 15-2000 ns range
- Polarity of sequential pulses – the same
Example
Download user manual (1.3Mb)
Download user manual for suggested high voltage power supply (1.5Mb)
Download STEP model for HVSW-04 (ZIP archive, 19MB)