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QBU-BT-series Pockels cell drivers

Applications

  • Q-switching
  • Pulse picking, pulse slicing

Features

  • Extremely flexible solution
  • Push-up, pull-down and mixed schemes in one module
  • Up to 6 kV output voltage
  • Up to 100 kHz and higher repetition rate
  • Perfectly suits for the laboratory purposes
qbu-bt-manual-en.pdf

Download user manual (373kB)

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

All drivers allow operations in three different operating modes (pull down scheme (= normally on), push up scheme (= normally off) and external synchronization mode (= repetition of external low voltage signal)) and therefore suit ideally for the laboratory usage.

qbu-h60.gif

High repetition rates and fast transition times are additional benefits.

Performance

In internal synchronization mode performance of QBU-BT-series (from QBU-BT-1004 to QBU-BT-6024) 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).

Output voltage, kV
Repetition rate, kHz
0.40-0.79
296
0.80-1.19
200
1.20-1.39
160
1.40-1.59
130
1.60-1.79
110
1.80-1.99
90
2.00-2.49
56
2.50-2.99
40
3.00-3.49
31
3.50-3.99
24
4.00-4.49
18
4.50-4.99
15
5.00-5.49
12
5.50-5.99
11
6.00-6.00
9

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.

Input:

Voltage
110/230 VAC, 50/60 Hz
Current consumption
< 1 A

Output:

Working modes
pull-down scheme
push-up scheme
repetition of external signal
Voltage, high level
regulated, up to 6 kV 1
Voltage, low level
fixed, 0 V
Pulse width
1 us - 1 s (in internal synchronization mode)
200 ns - DC (in external synchronization mode)
Repetition rate
up to 50 kHz (CW), up to 100 kHz (burst-mode) 1
Rise time
< 20 ns 2
Fall time
< 20 ns 2
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
0 … +40 °C
Storage temperature
-20 … +60 °C
Humidity
90%, non-condensing

Other:

Size (LxWxH)
225x200x60 mm
Weight
2 kg
1) these parameters aren't indepenent and cannot achieve their maximum at the same time
2) 10-90% level, warranted at load capacitance 11 pF and below

Voltage modifications

Model *
Description
QBU-BT-6024
2.4-6.0 kV high voltage adjustment range
QBU-BT-5020
2.0-5.0 kV high voltage adjustment range
QBU-BT-4016
1.6-4.0 kV high voltage adjustment range
QBU-BT-3012
1.2-3.0 kV high voltage adjustment range
QBU-BT-2008
0.8-2.0 kV high voltage adjustment range
QBU-BT-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-BT-5020-LJ
2.0-5.0 kV high voltage adjustment range
Low jitter option
qbu-bt-manual-en.pdf

Download user manual (373kB)