Electro-Optic Q-Switch Driver

STQBD is the series of high repetition rate Pockels cell drivers allowing simple and reliable operation of Q-witched lasers.

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Compact Design

High repetition rate

Wide range of output voltages

High reliability

Brief Description: STQBD is the series of high repetition rate Pockels cell drivers allowing simple and reliable operation of Q-witched lasers.

PRODUCT DESCRIPTION

STQBD Series OEM Drivers

STQBD is the series of high repetition rate Pockels cell drivers allowing simple and reliable operation of Q-witched lasers. Devices provide wide range of output direct voltages (up to 6 kV). It allows operation with Pockels cells assembled on different electrooptical crystals from low quarter-wave voltage Lithium Niobate and BBO to DKDP that requires much higher voltage levels for proper operation. STQBD-series Pockels Cell Drivers have modifications both for pull-up and pull down schemes.

STQBD-Series devices provide high repetition rates (up to 100 kHz) that makes them a good solution for electro-optical Q-switched lasers with CW pumping. On the other hand a short rising (falling) time allows operation in short pulsed systems with high peak output power and energy (flashlamp-pumped Nd:YAG lasers).

Another advantage is the ability of operation with extremely high loads (up to 0.5 nF). This feature leads to higher reliability of the device and permits remote operation of Pockels cell in laser head that can be connected to driver using long cables (correct and effective operation has been approved with cables up to 3 meters). This allows the designing of Q-switched laser systems with compact remote laser heads where close placement of Pockels cell and driver is impossible because of volume insufficiency or other causes.

Features:

Compact OEM design

Up to 6 kV output voltage

Long cable operation

Up to 100 kHz repetition rate

Up to 0.5 nF load

Pull-up and pull-down scheme modifications

Specifications

Input:  
Voltage +24VDC
Output:  
Voltage up to 6 kV
Repetition Rate from single pulse to 100 kHz
Load up to 0.5 nF
Rise time (Fall time) 20 ns
Recovery Time 10 us
  (depends on load, @ 100 pF)
Safety:  
Leakage Current not more than 150 uA
Environment:  
Operation Temperature -20…+45 C
Storage Temperature -40…+85 C
Humidity 90%, non-condensing
Size (LxWxH) 110x80x25 mm
Weight 0.1 kg
Options Harsh environment version

Part Number Description:

STQBD-XXYY-ZZ

STQBD – STQBD series EO Q-switch driver

XX – maximum output voltage from 20 to 60 (2 - 6kV)

YY – minimum output voltage from 12 to 20 (1.2 – 2.0kV)

ZZ – UP: modification for pull-up scheme; DN: modification for pull-down scheme

Waveform

We offer five standard solutions:

STQBD-6024-UP/DN

STQBD-5020-UP/DN

STQBD-4016-UP/DN

STQBD-3012-UP/DN

STQBD-2008-UP/DN

Options

Adjustment range of output voltage (see figure) can be selected within the following model series: STQBD-6024 (2.4-6 kV), STQBD-5020 (2-5 kV), STQBD-4016 (1.6-4 kV), STQBD-3012 (1.2-3 kV), STQBD-2008 (0.8- 2 kV).

STQDB-series Pockels cell drivers have two modifications: working by pull-up scheme or working by pull-down scheme.

Most of time gate is retained under voltage that is indicated in grey on figure; time of rapid growth/slump (20 ns) is indicated in red; time of relatively slow recovery (~10 us) is indicated in blue. Adjustable voltage level is designated by the arrow.

Applications

STQBD-Series Pockels Cell Drivers are available in standard and special versions. Standard modification is a relatively simple OEM device designated for operation in laboratory or medical laser systems at normal temperature and humidity conditions. These modules are designed in accordance with IEC60601-1 medical safety standard requirements. Output parameters (direct high voltage) are controlled by use of analog interface.

Special version is available for laser systems designated for operation in harsh environment. These devices are distinguished due to wide operation temperature range, humidity and vibration steadiness. In this version all parameters are controlled by simple and reliable internal multi-turn trimpots.

STQBU Series OEM Drivers

STQBU is a series of multi-functional Pockels cell drivers of hi-end class. In contrast to analogues, they can provide rapid switching of input voltage in two directions: both up and down. STQBU-Series Pockels Cell Driver is extremely flexible solution for driving of the Pockels cell that works upon any user-defined scheme (that may be pull-up, pull-down schemes or any combinations of them).

Modules provide wide range of output direct voltages (up to 5kV). It allows operation with Pockels cells assembled on different electrooptical crystals from low quarter-wave voltage Lithium Niobate and BBO to DKDP that requires much higher voltage levels for proper operation.

Moreover, STQBU-Series modules provide high repetition rates (up to 100kHz) that makes them a good solution for electro-optical Q-switched lasers with CW pumping. On the other hand a short rising (falling) time allows operation in short-pulsed systems with high peak output power and energy (flashlamp pumped Nd:YAG lasers).

Another advantage of STQBD-series drivers is an ability of handling with extremely high loads (up to 0.5 nF). This feature leads to higher reliability of the device and permits remote operation of Pockels cell in laser head that can be connected to driver using long cables (correct and effective operation has been approved with cables up to 3 meters). This allows the designing of Q-switched laser systems with compact remote laser heads where close placement of Pockels cell and driver is impossible because of volume insufficiency or other causes.

Features

Extremely flexible solution

Pull-up and pull-down schemes

Up to 5 kV output voltage

Up to 0.5 nF load

Compact OEM design

Long cable operation

Up to 100 kHz repetition rate

Specifications

Input:  
Voltage +24VDC
Output:  
Voltage up to 5 kV
Repetition Rate from single pulse to 100
Load up to 0.5 nF
Rise time (Fall time) 20 ns
Recovery Time 10 us
  (depends on load, @ 100
Safety:  
Leakage Current not more than 150 uA
Environment:  
Operation Temperature -20…+45 C
Storage Temperature -40…+85 C
Humidity 90%, non-condensing
Size (LxWxH) 130x80x20 mm
Weight 0.1 kg
Options Harsh environment version

Part Number Description:

STQBU-XXYY

STQBU – STQBU series EO Q-switch driver

XX – maximum output voltage from 20 to 50 (2 - 5kV)

YY – minimum output voltage from 12 to 20 (1.2 – 2.0kV)

Output Waveform:

We offer four standard solutions:

STQBU-5020

STQBU-4016

STQBU-3012

STQBU-2008

Other output voltages from 0.8 to 6 kV are available on request

Options

Adjustment range of output voltage (see figure) can be selected within the following model series: STQBU-6024 (2.4-6 kV), STQBU-5020 (2-5 kV), STQBU-4016 (1.6-4 kV), STQBU-3012 (1.2-3 kV), STQBU-2008 (0.8-2 kV). Time of rapid pulse growth (20 ns) is indicated red on figure time of same rapid slump is indicated blue (20 ns). Adjustable voltage level is designated by the arrow.

Application

STQBU-Series Pockels Cell Drivers are available in standard and special versions. Standard modification is a relatively simple OEM device designated for operation in laboratory or medical laser systems at normal temperature and humidity conditions. These modules are designed in accordance with IEC60601-1 medical safety standard requirements. Output parameters (direct high voltage) are controlled by use of analog interface.

Special version is available for laser systems designated for operation in harsh environment. These devices are distinguished due to wide operation temperature range, humidity and vibration steadiness. In this version all parameters are controlled by simple and reliable internal multi-turn trimpots.

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