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QBU-series Pockels cell drivers

Applications

  • Q-switching
  • Pulse picking, pulse slicing

Features

  • Extremely flexible solution
  • Push-up and pull-down schemes
  • Up to 6 kV output voltage
  • Up to 100 kHz repetition rate
  • Compact OEM design
qbu-manual-en.pdf

Download user manual (682kB)

QBU-series consist of several Pockels cell drivers differ with their output voltage range (see also How to order? section) and covering range up to 6.0 kV.

Modules have fast transition times in both directions and repeat at their output external driving TTL signal. As a result they may be used for q-switched lasers of push-up scheme, pull-down scheme as well for mixed-type or other user-defined scheme.

qbu-h60.gif

Under conditions of appropriate forced air cooling, low load capacitance and low operating voltage modules may achive performance up to 100 kHz.

Performance

For instance, QBU-5020 run with proper load (Pockels cell with 5-7 pF capacitance plus 30-50 cm cable) and under condition of appropriate cooling has typical performance as below:

Output voltage, kV
Repetition rate, kHz (*)
2.00
90-110
3.00
50-60
4.00
28-38
5.00
18-26

(*) Values are approximate, exact performance depends on actual load capacitance and cooling conditions.

In burst mode (i.e. for short term operations) the performance increases approximately twice and exceeds 100 kHz at low operating voltages and low load capacitances.

Higher load capacitance decreases the performance.

Input:

Voltage
+24 VDC

Output:

Working modes
repetition of external low voltage signal
Voltage, high level
regulated, up to 6 kV 1
Voltage, low level
fixed, 0 V
Pulse width
200 ns - DC
Repetition rate
up to 50 kHz (CW), up to 100 kHz (burst-mode) 1, 2
Rise time (fall time)
< 15 ns (about 10 ns typ.) 3
Jitter
10 ns (1 ns in LJ-modification)
Delay time
1 us (100 ns in LJ-modification)
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
90%, non-condensing

Other:

Size (LxWxH)
130x80x25 mm
Weight
0.1 kg
1) these parameters aren't indepenent and cannot achieve their maximum at the same time
2) forced air cooling is required for operating with high repetition rates
3) 10-90% level, warranted at load capacitance 11 pF and below

Voltage modifications

Model *
Description
QBU-6024
2.4-6.0 kV high voltage adjustment range
QBU-5020
2.0-5.0 kV high voltage adjustment range
QBU-4016
1.6-4.0 kV high voltage adjustment range
QBU-3012
1.2-3.0 kV high voltage adjustment range
QBU-2008
0.8-2.0 kV high voltage adjustment range
QBU-1004
0.4-1.0 kV high voltage adjustment range

(*) Other output voltages are available on request

Other options

-LJ
Low jitter option

Example

QBU-5020-LJ
2.0-5.0 kV high voltage adjustment range
Low jitter option
qbu-manual-en.pdf

Download user manual (682kB)

qbu-step.zip

Download STEP model (ZIP archive, 2.9MB)