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Home Electro-optics MOSFET-based Pockels Cell Drivers Pockels Cell Driver Boards QBD-series Pockels Cell Drivers QBD-mini Pockels cell drivers

QBD-mini Pockels cell drivers

QBD-mini is the subcompact driver in the QBD-series. Its distinctive features are:

  • Compact (as small as 90x50x20 mm)
  • Push-up or pull-down modifications
  • Up to 4.0 kV output voltage
  • Up to 50-100 kHz repetition rate (depending on voltage)
  • < 20 nsec rise time or < 20 nsec fall time

Description

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 the range of 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

Output voltage, kV Repetition rate, kHz (*)

1.60

110-150

2.00

70-110

3.00

35-50

4.00

18-25

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 the actual load’s 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.

Technical Specifications

INPUT

Voltage

+24 VDC

OUTPUT

Modifications by operational modes

pull-down (= normally on)
or push-up (= normally off)

Voltage, high level

regulated, up to 4 kV1

Voltage, low level  

fixed, 0 V

Pulse Repetition Rate

up to 30 kHz (CW), up to 50 kHz (burst-mode)1, 2

Rise time (fall time)

<20 nsec3

Recovery Time

5-10 µsec (load-dependent)

Timing Jitter

10 nsec

Delay Time

1 µsec

Load Capacitance

up to 0.5 nF1
ENVIRONMENT

Operational Temperature

+10 °C to +40 °C (wider range on request)

Storage Temperature

‐20 °C to +60 °C

Humidity

90%, non-condensing

PHYSICAL

Exterior Dimensions (LxWxH)

90x50x20 mm

Weight

0.1 kG

1 these parameters aren’t independent, 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.

How to Order

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-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

Pull-up scheme,
1.2-3.0 kV high voltage adjustment range

QBD-mini-2008-UP

Pull-up scheme,
0.8-2.0 kV high voltage adjustment range

QBD-mini-1004-UP

Pull-up scheme,
0.4-1.0 kV high voltage adjustment range

(*) Other output voltages are available on request

Example:

QBD-mini-3012-UP

Pull-up scheme,
1.2-3.0 kV high voltage adjustment range

Downloads

QBD-mini Pockels cell drivers - User manual
qbd-mini-manual-en.pdf (416 KB)