Products

HVSW-03 Pockels cell driver

Pulse picking, high repetition rate Pockels cell driver

HVSW-03 Pulse picker, Pockels cell driver for pulse picking, cavity dumping, regenerative amplifier control, 1 MHz

Applications

Pulse picking
Cavity dumping
Regenerative amplifier control

Features

Up to 2.0 kV output voltage
Up to 1 MHz repetition rate (at 1.6 kV voltage)
6-8 ns rise time and fall time
Two possible operating modes: short pulse (10-15 ns, fixed width) and long pulse (100-2200 ns, adjustable width)
Integrated high voltage power supply
Compact (as small as 169x60x32 mm)

Download manual (1 MB)

The Pockels cell driver HVSW-03 is a dedicated high voltage high repetition rate 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.

Using the driver one chooses between two operation modes:

fixed width short pulses (about 10-15 ns), triggered by a leading edge of an external TTL.
variable width long pulses (adjusted in range of 100-2200 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.

The maximum output voltage is 2 kV bipolar, the maximum repetition rate is up to 1-2 MHz (in dependence on output voltage, cooling conditions and device modification). Driver’s bottom surface is a heat dissipating area for cooling the device, so we recommend using either a massive chassis, a heat sink or a cold plate to attach the driver.

The Pockels cell driver HVSW-03 requires +24 V DC power supply and a pulse generator to set an operating frequency and pulse width (in variable pulse width mode). There is no need for a separate DC high voltage source. An output voltage level is set by user using an analogue interface or base interface RS-485 and provided PC software.

Please, also take a look at HVSW-04 MHz-class driver with water cooling.

Input:

Voltage

+24 V DC

Current consumption

< 5.5 A

Output:

Output type

bipolar

Pulse basement¹

0V, fixed

Pulse amplitude^{1, 2}

adjustable in 0-2kV range

Maximum repetition rate²

2 MHz

Minimum repetition rate²

single shot (there is an internal restriking circuit which makes the operations at such a low repetition rate possible)

Pulse width

fixed, about 15ns in Fixed pulse width mode
100ns-2200ns or 15ns-2200ns adjustable in Variable pulse width mode, longer on request

Interpulse interval

>100ns

Rise / fall time³

6-8 ns

Delay time

< 50 ns

Jitter

<0.5ns (+/- 250 ps)

Load capacitance

typ. 5-7 pF

Environment:

Operation temperature

+10 … +40 °C

Storage temperature

-20 … +60 °C

Humidity

0 … 90%, non-condensing

Other:

Protections

– from too long pulses (Gate limit), adjusted by the customer in 200ns to 2200ns range
– from overheating

Size (LxWxH)

169x60x32 mm

Weight

< 0.5 kg

¹⁾ In terms of bipolar output
²⁾ Maximum pulse repetition rate depends on pulse amplitude, pulse amplitude and pulse repetition rate cannot achieve their maximums at the same time
³⁾10-90% level, guaranteed at load capacitance 5-7 pF and below
These and other parameters might be changed upon request

Modifications

Model

Description

HVSW-03

Base version:

Maximum output voltage – 2kV
Maximum repetition rate – 2MHz
Rise time / fall time – 6-8ns
Short pulse (15ns fixed) and long pulse (100-2200ns adjustable) regimes
Polarity of sequential pulses – alternating

HVSW-03-FX

Version with fixed polarity of the output pulses:

Maximum output voltage – 2kV
Maximum repetition rate – 2MHz
Rise time / fall time – 6-8ns
Short pulse (15ns fixed) and long pulse (100-2200ns adjustable) regimes
Polarity of sequential pulses – the same

HVSW-03-WR

Version with wide pulse width adjustment range:

Maximum output voltage – 2kV
Maximum repetition rate – 2MHz
Rise time / fall time – 6-8ns
Long pulse regime only (15-2200ns adjustable)
Polarity of sequential pulses – alternating

hvsw-03-manual-en.pdf

Download user manual (1 MB)