Pockels Cell Driver for Laser Pulse Selection
PRODUCT DATASHEETThe HVR-Drive
Housego is designed to switch Pockels
cells used for pulse management inhigh repetition rate ultrafast laser
regenerative amplifiers.
The HVR-Drive can drive Pockels cells at 1/4 λ or
1/2 λ up to 7.5 kV and up to 200 kHz. The driverproduces a top-hat waveform with fast rising andfalling edges.
Heat load and space requirements are at a minimum
due to the use of external power supplies andcontrol electronics.
The HVR-Drivemeasures 136.5x178x70 mm) with the standard heat sink forconvection cooling. It can also be air-cooled orwater-cooled for higher repetition rates.
G&H can supply the driver in different form factors
for high volume applications. On/Off trigger inputs
can be standard TTL signals or optional opticaltrigger inputs can be supplied.
We can work with you to customize the driver foryour specific application. Options such as remotemonitoring, remote shutdown and overtemperature indicators can be supplied.

Key Features• 0 200 kHz repetition rate pulses• 1.0 7.5 kV output voltage• 10 15 ns rise and fall times• 250 ns 3 µs pulse widths• Bipolar balanced output
Key Benefits• Compact footprint• Reduced heat load
• Easy integration• Flexible designApplications• Metal cutting• Welding• Glass cutting• Sapphire cutting• Spectroscopy

HVR-................................................................................................................................................................................
Product datasheet ref: HVR-Drive / Revision No. 3.1
As part of our policy of continuous product improvement, we reserve the right to change specifications at any time.

March 2018
Page 1

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Specifications
ParameterConditions

MinMaxUnits

15.0

18.0

VDC

300mA

100mA

15V60ns3000ns

POWER REQUIREMENTS
Low voltage supply
Low voltage supply

200 kHz rep rate

2 x high voltage supplies

For 7.5kV out, external ± 1875 VDC required

1TRIGGER
On/Off trigger voltage

Normally 5 V, TTL

4Trigger to output delay

5 V trigger

Pulse width(subject to 20% duty cycle maximum)

Jitter, trigger to output

2 ns trigger rise time50

ps

7.5 kV, 10 pF, water cooled2100

kHz

6.0 kV, 10 pF, water cooled

150

kHz

5.0 kV, 10 pF, water cooled

200

kHz

Ratio of pulse width to period (1/frequency)

20%

250

OUTPUT PULSE
Repetition rate

Duty cycle
Pulse amplitude

1.07.5kV

Rise/fall times

1015ns050°C

ENVIRONMENTAL
Operating ambientNOTES
Two external high voltage power supplies are required; one positive output, one negative output.
For example, to achieve 6 kV output you will need ±1500 VDC input.
1 High voltage current requirements are determined by the pulse width and repetition rate.
Rise and fall times vary with output voltage; higher voltages produce longer rise and fall times.
2 Convection cooled, the maximum rep rate is 25 kHz @ 7.5 kV, 37.5 kHz @ 6 kV and 50 kHz @ 5 kV.
Water cooled, chiller set to 24°C, flow rate to 1.5 gal/minute (6 liter/min) nominal.
CAUTIONS
Do not connect the outputs to ground or damage to the driver will occur.
The low voltage supply must be on before applying the high voltage inputs.
The On/Off triggers must not overlap or damage to the driver will occur.

For further information
E: sales@goochandhousego.com

goochandhousego.com

HVR-................................................................................................................................................................................
Product datasheet ref: HVR-Drive / Revision No. 3.1As part of our policy of continuous product improvement, we reserve the right to change specifications at any time.

March 2018
Page 2