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QBD-nano avalanche transistor Pockels cell driver


  • Q-switching


  • Compactness (40x30x8 mm)
  • Bipolar output
  • Up to 5 kV output voltage
  • Up to 4 kHz repetition rate
  • 1-3 ns rise time

Download user manual (0.6MB)

QBD-nano is an extremely compact Pockels cell drivers producing high voltage pulses with high repetition rates, fast rise time and adjustable pulse amplitude. Wide temperature range of operation is another important feature.

It produces an up to 5 kV bipolar output voltage. Please, note that by bipolar device an output pulse voltage U is formed by applying +U/2 to positive output wire and –U/2 to negative.

QBD-nano is specially designed to control Pockels cells by applying a fast switching high voltage. The module requires +5 V DC power supply and a pulse generator to set an operating frequency. An output voltage level can be programmed in 2600 V-3800 V range (base version QBD-nano-3801) by user either manually (through onboard configuration trimpot) or automatically (applying a DC voltage between respective pins).

QBD-nano output signals

QBD-nano is based on avalanche transistors and offers fast transition time for a leading pulse edge. The recovery time by QBD-nano is relatively long (5-10 μs for the trailing pulse edge vs 1-3 ns by QBU-nano).

QBD-nano has some duration (on-time, "shelf"). It could be choosen at the time of order in 0.5-1 μs range. By default, it is 0.8-0.9 μs.

for base version QBD-nano-3801


+5 V DC
500 mA max


Voltage, high level
adjustable in working range, model dependent, see How to order? section.
Pulse-to-pulse stability
< 1%
Rise time 1
1-3 ns
On-time (“shelf”)
0.5-1.0 us (factory preset, 0.8-0.9 us by default)
Recovery time
<10 us (depends on load)
Delay 2
< 20 ns
Jitter 2
< 0.1 ns
Repetition rate 1
up to 4 kHz max (load and voltage dependant)
Load capacitance
5-7 pF recommended, 20 pF max


Operation temperature
-40 … +60 °C


Size (LxWxH)
40x30x8 mm
0.01 kg
1) depends on load capacitance and pulse amplitude
2) depends on triggering signal parameters

Voltage modifications

UOUT= 2.6 - 3.8 kV
FMAX= 1 kHz
Base version in 40x30mm dimensions
UOUT= 1.85 - 2.5 kV
FMAX= 2 kHz
Low-cost low voltage version in 40x30mm dimensions
UOUT= 3.7 - 5 kV
FMAX= 1 kHz
Coming soon, in 40x35mm dimensions
UOUT= 2.6 - 3.8 kV
FMAX= 4 kHz
Coming soon, in 40x35mm dimensions

Download user manual (0.6MB)