Product Detail

QBU-nano Avalanche Transistor Pockels Cell Drivers

Very compact Pockels cell drivers (8.0 x 5.0cm) producing up to 5.8 kV unipolar voltage pulses.

QBU-nano fast ns Pockels cell driver 1
QBU-nano fast ns Pockels cell driver 2

Good for pulse picking & pulse slicing, for laser regenerative amplifiers control.

  • Pulse width adjustable up to ~ 800 ns
  • Unipolar output
  • Up to 5.8 kV output voltage
  • Up to 2 kHz repetition rate
  • 1-3 ns rise and fall time
  • Operating temperature -40...+60° C

QBU-nano is a compact Pockels cell drivers producing high voltage quasi-rectangular unipolar pulses with high repetition rates, fast rise and fall time and adjustable pulse amplitude and pulse width. Wide operation temperature range is another important feature of QBU-nano.

The module requires +12 V DC power supply and a pulse generator to set an operating frequency and the pulse duration. An output voltage level (up to 5.8 kV) can be programmed in 70-100% level from VMAX range by user either manually (through onboard configuration trimpot) or automatically (applying a DC voltage between respective pins).

The output pulse duration is determined by time between two triggers, X3 and X4.
QBU-nano output signals

QBU-nano is based on avalanche transistors and offers fast transition time for both pulse edges, 1-3 ns.

Input:

Voltage
+12 V DC (+8...+16 V)
Current
max 500 mA

Output:

Type
unipolar
Voltage, high level
1300-2000 V for 2000 V modification
1800-2800 V for 2800 V modification
2600-3800 V for 3800 V modification
3600-4800 V for 4800 V modification
4400-5800 V for 5800 V modification
Repetition rate 1
2kHz max for 2000V, 2800V, 3800V modifications
1kHz max for 4800V modification
500Hz max for 5800V modification
Pulse width
up to 800ns adjustable
Rise time1
1-3 ns
Fall time1
1-3 ns
Delay time2
15-20 ns typ.
Jitter2
0.1-0.2 ns typ.
Pulse-to-pulse stability
< 1%
Load capacitance
5-7 pF recommended, 10 pF max for most of modifications
3 pF recommended, 5 pF max for 5800 V modification

Environment:

Operation temperature
-40 … +60 °C

Other:

Size (LxWxH)
80 x 50 x 20 mm
Weight
0.1 kg

1) depends on load capacitance and pulse amplitude
2) depends on trigger signal parameters

Modifications

Model *
Description
QBU-nano-2002
UOUT= 1.3 - 2.0 kV
FMAX= 2 kHz
QBU-nano-2802
UOUT= 1.8 - 2.8 kV
FMAX= 2 kHz
QBU-nano-3802
UOUT= 2.6 - 3.8 kV
FMAX= 2 kHz
QBD-nano-4801
UOUT= 3.6 - 4.8 kV
FMAX= 1 kHz
QBU-nano-58005
UOUT= 4.4 - 5.8 kV
FMAX= 0.5 kHz
Load capacitance 3 pF is recommended, 5 pF max

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