OEM Tech QBD-nano Pockels Cell Driver User Manual

OEM Tech QBD-nano Pockels Cell Driver

Warning! This equipment produces high voltages that can be very dangerous. Please, read user manual before starting operations.
Important note: please measure the output with symmetrical (differential) high voltage probe only. Measurement made with inappropriate equipment is a common cause of driver’s failure.

Overview

QBD-nano is a series of extremely compact Pockels cell drivers producing high voltage bipolar pulses with fast rise time (1-3 ns), fixed pulse duration (about 0.7 us) and slow voltage decay (5-10 us). It is possible to adjust pulse amplitude (80-100% from UMAX) and to change repetition rate up to few kHz by triggering signal. Wide temperature range of operation is another important driver feature.

Main parameters of the base version are as below:

• Input voltage – 5-12 V DC
• Output – bipolar pulses of high voltage (see also a picture below)
• Pulse amplitude – adjustable in (0.80-1)UMAX range
• Rise time – 1-3 ns (depends on load and pulse amplitude)
• Maximal repetition rate – 1-10 kHz (depends on load, pulse amplitude, ambient temperature and cooling conditions)
• Operating temperature – -40…+65 ̊C

Different parameters are available on request.

Connections, signals, signal descriptions

J1 ( INPUT / INTERFACE ): SM06B-SRSS (JST)

J2 (HV OUTPUT): SM02B-BHSS (JST)

HV ADJUST TRIMPOT:

Pulse amplitude is adjustable with this trimpot in (0.80-1)UMAX range.

Typical output / Options

Standard waveform, optional waveforms (longer rise time, bell-shaped pulses ):

Specifications

ELECTRICAL SPECIFICATION

• Input

  • +5…+12 V DC (4.5 V-12.5 V); max 500 mA @ 5V max 200 mA @ 12V

• Current consumption

  • 400-420 mA @ 5 V or 160-180 mA @ 12 V in target regimes: 5 pF, 5.0 kV, 2 kHz 5 pF, 3.8 kV, 4 kHz 5 pF, 2.5 kV, 8 kHz

• Output

• Type Bipolar

• HV pulse amplitude (0.80-1)UMAX adjustable

• Maximal output voltage (UMAX) Three standard versions – 2500 V, 3800 V, 5000 V, other on request, see also How to order? section

• Pulse-to-pulse stability <1 %

• Rise time 1-3 ns 1)

• On-time (“shelf”) 0.5-1.0 us (factory preset, 0.8-0.9 us by default)

• Recovery time <10 us

• Delay <20 ns typ. 2)

• Jitter <0.1 ns typ. 2)

• Repetition rate 1-10 kHz max 1,3) see also How to order? section

• Load capacitance 5-7 pF recommended, 20 pF max
  Environment

• Operation temperature -40…+65 ̊C (other on request)

1. depends on load capacitance and pulse amplitude
2. depends on triggering signal parameters
3. depends on ambient temperature (maximal repetition rate is derated approximately twice at 65 ̊C ambient temperature and rises in cooler conditions)

MECHANICAL SPECIFICATION

• Size (LxWxH) 40x30x10 mm (see also dimensional drawing below)
• Weight 10 g

Dimensional drawing

How to order?

QBD-nano-XXYY, where:

• XX codes the maximum output voltage (UMAX)
• YY codes the maximum repetition rate (FMAX)

Examples (the most popular modifications):

Other modifications are available on request.

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