Thumbnail of 1-3 ns Fast Q-Switch, QBD-nano Tiny Pockels Cell Driver photo 1
Thumbnail of 1-3 ns Fast Q-Switch, QBD-nano Tiny Pockels Cell Driver photo 2

Description

QBD-nano is an extremely compact Pockels cell driver producing high voltage pulses with high repetition rates, fast rise time and adjustable pulse amplitude. Wide temperature range of operation is another important feature.

It produces an up to 5 kV bipolar output voltage. Please, note that by bipolar device an output pulse voltage U is formed by applying +U/2 to positive output wire and –U/2 to negative.

QBD-nano is specially designed to control Pockels cells by applying a fast switching high voltage. The module requires +5 …+12 V DC power supply and a pulse generator to set an operating frequency. An output voltage level can be programmed in 0.8-1 UMAX range by user either manually (through onboard configuration trimpot) or automatically (applying a DC voltage between respective pins).

Super-compact Pockels cell driver QBD-nano is based on avalanche transistors and offers fast transition time for a leading pulse edge. The recovery time by QBD-nano is relatively long (5-10 μs for the trailing pulse edge vs 1-3 ns by QBU-nano Pockels cell driver).

QBD-nano has some duration (on-time, “shelf”). It could be chosen at the time of order in 0.5-1 μs range. By default, it is 0.8-0.9 μs.

Advanced Q-switch drivers are more improved, allow to change an output voltage level and advanced switching control to vary pulse repetition rate and width (long pulses, from 200 ns to CW). They provide pulses with both fast edges (< 15-20 ns) and allow to switch high voltage on the cryslal shortly before pull-down pulse to prolongate the crystal life-time.

QBU-series Pockels cell driver, up to 6 kV.
QBU-mini Pockels cell driver, compact version of QBU, up to 4 kV
QBU-mini-SP Pockels cell driver, compact version of QBU with short pulses, up to 4 kV QBU-10kV-series, up to 10 kV.

1-3 ns Fast Q-Switch, QBD-nano Tiny Pockels Cell Driver

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Specifications

Input Voltage: 5-12 V DC
Pulse Amplitude: adjustable in (0.80-1)UMAX range
Rise Time: 1-3 ns
Maximal Repetition Rate: 1-10 kHz
Operating Temperature: -40...+65 °C
Trigger Signal Amplitude: 5 V (3 V-8 V)
Trigger Input Impedance: 50 Ohms
Trigger Rising Edge: < 20 ns
Trigger Duration: > 20 ns
Input Impedance Of PIN 2: 47 kOhm
Recommended Current Capability @ 5 V: >500 mA
Recommended Current Capability @ 12 V: >200 mA

Got questions about specs? Use the inquiry form to ask.

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Features

  • Compact Design: The QBD-nano Pockels cell driver is part of a series known for its extremely compact form, making it ideal for space-constrained applications.
  • High Voltage Bipolar Pulses: Produces high voltage bipolar pulses with a fast rise time of 1-3 ns and a fixed pulse duration of approximately 0.7 µs.
  • Adjustable Pulse Amplitude: Allows adjustment of pulse amplitude within the range of 80-100% of UMAX, offering flexibility for various applications.
  • Variable Repetition Rate: Capable of handling repetition rates up to a few kHz, adjustable via a triggering signal.
  • Wide Operating Temperature Range: Designed to operate efficiently in temperatures ranging from -40°C to +65°C.
  • Input Voltage: Operates on a DC input voltage range of 5-12 V, providing versatility in power sources.
  • High Voltage Output: Features bipolar high voltage output with adjustable pulse amplitude.
  • Fast Rise Time: Achieves a rise time of 1-3 ns, depending on load and pulse amplitude, ensuring rapid performance.
  • Customizable Parameters: Different parameters can be customized upon request to meet specific requirements.
  • Easy Integration: Comes with clear connection points and signal descriptions for seamless integration into existing systems.
  • Safety Warning: Produces high voltages that can be dangerous. It is crucial to read the user manual before operation and use appropriate measurement equipment to prevent driver failure.

Applications

  • Cavity dumping
  • Q-switch

Frequently Asked Questions

What is the QBD-nano Pockels cell driver?
The QBD-nano is a series of extremely compact Pockels cell drivers that produce high voltage bipolar pulses with fast rise times, fixed pulse durations, and slow voltage decay. It features adjustable pulse amplitude and a wide temperature range of operation.
What are the input voltage requirements for the QBD-nano?
The QBD-nano requires an input voltage of 5-12 V DC.
How can the pulse amplitude be adjusted on the QBD-nano?
The pulse amplitude can be adjusted using the HV ADJUST trimpot within a range of 80-100% of UMAX. Additionally, applying a control voltage between PINS 1 and 2 on the INPUT/INTERFACE can further adjust the pulse amplitude.
What is the maximum repetition rate of the QBD-nano?
The QBD-nano can achieve a maximum repetition rate of 1-10 kHz, depending on load, pulse amplitude, ambient temperature, and cooling conditions.
What are the operating temperature limits of the QBD-nano?
The QBD-nano operates within a temperature range of -40 to +65 degrees Celsius.
What safety precautions should be taken when using the QBD-nano?
The QBD-nano produces high voltages that can be dangerous. It is important to read the user manual before operation and to measure the output with a symmetrical (differential) high voltage probe to avoid equipment failure.
What are the signal requirements for triggering the QBD-nano?
The triggering signal applied to the QBD-nano should have an amplitude of 5 V (acceptable range is 3 V-8 V), an input impedance of 50 Ohms, a rising edge of less than 20 ns, and a duration greater than 20 ns.

Got more questions? Use the inquiry form to ask the supplier directly.

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