QBD-mini is a series of high repetition rate Pockels cell drivers allowing simple and reliable control of Q-switched lasers. Output voltages may be selected in range up to 4 kV.
Driver may be manufactured in two modification: for pull-down scheme (= normally on scheme) and for push-up scheme (= normally off scheme).
High repetition rates and fast transition times are additional benefits.
Performance
For instance, QBD-mini-4016-UP/DN 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:
(*) 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.
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
Repetition rate
up to 30 kHz (CW), up to 50 kHz (burst-mode)
1, 2
Rise time (fall time)
< 20 ns
3
Recovery time
5-10 us (depends on load)
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
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 23 pF and below
Pull-down (normally on) modifications
Pull-down scheme,
1.6-4.0 kV high voltage adjustment range
Pull-down scheme,
1.2-3.0 kV high voltage adjustment range
Pull-down scheme,
0.8-2.0 kV high voltage adjustment range
Pull-down scheme,
0.4-1.0 kV high voltage adjustment range
(*) Other output voltages are available on request
Push-up (normally off) modifications
Push-up scheme,
1.6-4.0 kV high voltage adjustment range
Push-up scheme,
1.2-3.0 kV high voltage adjustment range
Push-up scheme,
0.8-2.0 kV high voltage adjustment range
Push-up scheme,
0.4-1.0 kV high voltage adjustment range
(*) Other output voltages are available on request
Example
Push-up scheme,
1.6-4.0 kV high voltage adjustment range
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