QBD-BT-series consist of twelve Pockels cell drivers differ with their output voltage range (up to 6.0 kV) and operating scheme (see also How to order? section).
Operating scheme may be either pull down scheme (= normally on) or push up scheme (= normally off). Scheme should be predefined at the time of order.
High repetition rates and fast transition times are additional benefits of QBD-BT-series Pockels cell drivers.
Performance
In internal synchronization mode performance of QBD-BT-series (from QBD-BT-1004-UP/DN to QBD-BT-6024-UP/DN) is limited with values given in table below. Total load capacitance of Pockels cell and connective cable is assumed as 23 pF (this corresponds to pretty long 50 cm output cable bent in non-optimal way and higher than normal Pockels cell capacitance).
Higher performance can be achieved in external synchronization mode.
In burst mode (i.e. for short term operations) the performance increases at least 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)
Synchronization
internal and external
Voltage, high level
regulated, up to 6 kV
1
Voltage, low level
fixed, 0 V
Repetition rate
up to 50 kHz (CW), up to 100 kHz (burst-mode)
1
Rise time (fall time)
< 20 ns
2
Recovery time
5-10 us (depends on load)
Load capacitance
up to 0.5 nF
1
Environment:
Operation temperature
0 … +40 °C
Storage temperature
-20 … +60 °C
Humidity
90%, non-condensing
Other:
Size (LxWxH)
225x200x60 mm
1)
these parameters aren't indepenent and cannot achieve their maximum at the same time
2)
10-90% level, warranted at load capacitance 23 pF and below
Pull-down (normally on) modifications
Pull-down scheme,
2.4-6.0 kV high voltage adjustment range
Pull-down scheme,
2.0-5.0 kV high voltage adjustment range
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,
2.4-6.0 kV high voltage adjustment range
Push-up scheme,
2.0-5.0 kV high voltage adjustment range
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
Pull-down scheme,
2.0-5.0 kV high voltage adjustment range
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