Product Detail

QBD-mini-series Pockels Cell Drivers

QBD-mini-series is a line of quite simple, compact and inexpensive Pockels cell drivers for q-switching. Several Pockels cell driver circuit boards that differ with output voltage range (up to 4.0 kV bipolar) and operating scheme.

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Ideal for Q-switching.

  • Push-up or pull-down modifications (fixed)
  • Up to 4 kV output voltage
  • Up to 50-100 kHz repetition rate
  • < 20 ns rise time or < 20 ns fall time (leading edge)

QBD-mini-series is specially designed to control Pockels cells by applying a fast switching high voltage. The modules require +24 V DC power supply and pulse generator to set an operating frequency. An output voltage level can be programmed in working range by user either manually (through onboard configuration trimpot) or remotely (applying a DC voltage to the respective pin).

There are two possible modifications of output signal type:
push-up (= normally off scheme), when a base voltage level equals to zero
pull-down (= normally on scheme), when pulses from base bias voltage to ground are generated.

The desired one should be chosen at the time of ordering and could not be changed by user.

QBD-series is based on MOSFET technology and offers high repetition rates and fast transition time for a leading pulse edge. The recovery time by QBD is relatively long (5-10 μs for the trailing pulse edge vs >20 ns by QBU).

Input:

Voltage
+24 V DC

Output:

Modifications by working modes
pull-down (= normally on)
or push-up (= normally off)
Voltage, high level
regulated, up to 4 kV 1
Voltage, low level
fixed, 0 V
Maximum repetition rate
up to 30-50 kHz and higher (load and voltage dependant, see also manual) 1
Rise time (fall time)
< 20 ns 2
Recovery time
5-10 us (depends on load)
Jitter
10 ns
Delay time
1 us
Load capacitance
up to 0.5 nF 1

Environment:

Operation temperature
+10 … +40 °C (wider temperature range is available on request)
Storage temperature
-20 … +60 °C
Humidity
0 ... 90%, non-condensing

Other:

Size (LxWxH)
90x50x20 mm
Weight
0.1 kg

1) these parameters aren't indepenent and cannot achieve their maximum at the same time
2) 10-90% level, guaranteed at load capacitance 23 pF and below

Pull-down (normally on) modifications

Model *
Description
QBD-mini-4016-DN
Pull-down scheme,
1.6-4.0 kV high voltage adjustment range
QBD-mini-3012-DN
Pull-down scheme,
1.2-3.0 kV high voltage adjustment range
QBD-mini-2008-DN
Pull-down scheme,
0.8-2.0 kV high voltage adjustment range
QBD-mini-1004-DN
Pull-down scheme,
0.4-1.0 kV high voltage adjustment range

(*) Other output voltages are available on request


Push-up (normally off) modifications

Model *
Description
QBD-mini-4016-UP
Push-up scheme,
1.6-4.0 kV high voltage adjustment range
QBD-mini-3012-UP
Push-up scheme,
1.2-3.0 kV high voltage adjustment range
QBD-mini-2008-UP
Push-up scheme,
0.8-2.0 kV high voltage adjustment range
QBD-mini-1004-UP
Push-up scheme,
0.4-1.0 kV high voltage adjustment range

(*) Other output voltages are available on request


Example

QBD-mini-4016-UP
Push-up scheme,
1.6-4.0 kV high voltage adjustment range

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