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HVR-Drive™ BBO Pockels Cell Driver product image

HVR-Drive™ BBO Pockels Cell Driver

Designed to switch Pockels cells used for pulse management in high repetition rate ultrafast laser regenerative amplifiers.

Full Product Description
Pulse amplitude:
Min: 1.0 kV, Max: 7.5 kV
Rise/fall time:
Min: 10 ns, Max: 15 ns
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Product description

The HVR-Drive from G&H is designed to switch Pockels cells used for pulse management in high repetition rate ultrafast laser regenerative amplifiers. This driver has a repetition rate from 0–200 kHz, an output voltage of 0–7.5 kV, rise and fall times of 10–15 ns with pulse widths of 100 ns–5 μs. The driver produces a top-hat waveform with fast-rising and falling edges.

Heat load and space requirements are at a minimum due to the use of external power supplies and control electronics.

The HVR-Drive measures 136.5x178x70 mm (5.375x7.0x2.8”) with the standard heat sink for convection cooling. It can also be air-cooled or water-cooled for higher repetition rates.

Key features

  • 0–200 kHz repetition rate pulses
  • 1.0–7.5 kV output voltage
  • 10–15 ns rise and fall times
  • 100 ns–5 μs pulse widths
  • Bipolar balanced output

Specifications

NameValue
Low voltage supplyMin: 21.0 VDC, Max: 28.0 VDC
Low voltage supply: 200 kHz rep rateMax: 300 mA
2 x high voltage suppliesMax: 200 mA (For 7.5kV out, external ± 1875 VDC required¹)
On/Off trigger voltageMin: 4 V, Max: 15 V, Normally 5 V, TTL
Trigger to output delay (5 V trigger)Min: 60 ns, Max: 50 ns
ON/OFF trigger separation (determines output pulse width)Min: 100 ns, Max: 5000 ns
Trigger pulse width (Actual ON or OFF pulse)Min: 50 ns, Max: 100 ns
Jitter, trigger to outputMax: 50 ps (2 ns trigger rise time)
Repetition rateMax: 100 kHz (7.5 kV, 10 pF, water cooled²), Max: 150 kHz (6.0 kV, 10 pF, water cooled), Max: 200 kHz (5.0 kV, 10 pF, water cooled),
Duty cycleRatio of pulse width to period (1/frequency): 20 %
Pulse amplitudeMin: 1.0 kV, Max: 7.5 kV
Rise/fall timeMin: 10 ns, Max: 15 ns
Operating ambientMin: 0 °C, Max: 50 °C

Notes

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 and rep rate; 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 with optional cold plate. Chiller set to 24°C, flow rate to 1.0 gal/minute (4 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.

DO NOT exceed a 20% duty cycle (ratio of pulse ON time to pulse OFF time).

The On/Off triggers must not overlap or damage to the driver will occur (minimum separation is 100 ns).

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