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Pockels cell drivers PCD-UHR series for cavity dumping

PCD-UHR series Pockels cell drivers are designed for a wide range of applications and operating modes. Repetition rate can be up to 3.5 MHz, while fast HV rise/fall time is less than 4 - 8 ns. Standard range of pulse durations is from 100 ns to 5 μs.

Features

  • Fast HV rise/fall time <4 – 8 ns
  • HV pulse amplitude up to 3.6 kV
  • Pulse repetition rate up to 3.5 MHz
  • Output pulse jitter < 50 ps if trigger pulse rise time < 0.5 ns

Specific features of PCD-UHRS drivers

  • Short circuit protection at driver output
  • Driver pad overheat sensor stops operation when overheated
  • Overheat optocoupled output signal
  • Switchable single pulse and two pulses control operation modes
  • LED for error indication (overheat and short circuit)

PCD-UHR series Pockels cell drivers are designed for wide range of applications and operating modes. Repetition rate can be up to 500 kHz for standard range of drivers, up to 1 MHz enhanced and up to 3.5 MHz high rate. Standard range of possible pulse durations is from 100 ns to 5 μs. It can be extended to infinity using pulse regeneration technique. Connection diagram can be PUSHPULL configuration using stand-alone driver, as well as FULL BRIDGE using two drivers for one Pockels cell. FULL BRIDGE configuration gives such advantages as repetition rate doubling to reach up to 7 MHz rate, pulse duration shortening down to zero or voltage doubling on pockels cell. Contact EKSPLA for more information and suggestions for Pockels cell driving solutions you need.

Most of PCD-UHR series units are available in two versions: „open frame“ which is ideal for OEM manufacturers incorporating drivers in their own systems and encased in aluminum housings. Encasing of Pockels cell driver in aluminum housing solves two problems: shields both humans and electronics from high voltage impact from operating Pockels cell driver, and protects driver itself from potentially harmful external contact – ensuring safe operation and driver longevity. The housed option is especially handy for researchers and custom product manufacturers who use these drivers during their own systems build-up. PCD-UHRS modification has possibility to shorten output pulse duration down to 15 ns. Following they can be used for single pulse selection in pulse picker applications for high repetition rate lasers.

General specifications table

Driver model PCD-UHR series PCD-UHRS series
Maximal HV rated voltage (for testing only) 3.8 kV
Maximal HV operating voltage <90% from rated voltage
HV pulse rise time < 4-8 ns (Fig.7)
HV pulse fall time < 4-8 ns (Fig.8)
HV pulse duration for single driver 100-5000 ns 15-5000 ns
Max HV pulse duration for full-bridge configuration 0-5000 ns N/A
Maximal HV pulse repetition rate 3.5 MHz 600 kHz
External triggering pulse duration requirement >100 ns >10 ns
External triggering pulse amplitude requirement 3.5-5 V (50 Ω load)
External triggering pulse rise and fall time < 20 ns < 5 ns
Maximal length of leads to Pockels cell 100 mm
Control diagram options:
- single triggering pulse control Fig. 4
- two trigger pulses control Fig. 3
HV pulse delay, typical 45 ns 30 ns
External powering requirements:
- high voltage supply depends on modification
- low voltage DC supply 12±0.5V, <150 mA; 14-25 V; <150 mA, on request 24±1 V, <150 mA

Specifications are given for Pockels cell with capacity <6pF. Not all combinations of parameters can be possible at the same time. Specifications are subject to changes without advance notice.

Driver needs to be mounted on the heatsink (excluding water cooled versions). Heat sink temperature needs to be lower than 35 °C (95 °F) in all regimes of operation.

 

Configuration examples of OEM version of PCD-UHR series drivers

P/N of driver PCD-UHR1-50-3.6
PCD-UHR2-50-3.6
PCD-UHR1-400-1.5
PCD-UHR2-400-1.5
PCD-UHR1-250-3.6
PCD-UHR2-250-3.6
PCD-UHR1-250-2.5
PCD-UHR2-250-2.5
PCD-UHR1-500-2.6
PCD-UHR2-500-2.6
PCD-UHR1-1000-1.8
PCD-UHR2-1000-1.8
Maximal HV rated voltage 3.8 kV 1.6 kV 3.7 kV 2.6 kV 2.7 kV 2 kV
Maximal HV operating voltage 3.6 kV 1.5 kV 3.6 kV 2.5 kV 2.6 kV 1.8 kV
Maximal HV repetition rate 50 kHz 400 kHz 250 kHz 250 kHz 500 kHz 1000 kHz
Pulse duration 100-5000 ns
HV pulse rise time, typical <7 ns <5.5 ns <7 ns <6 ns <6.5 ns <6 ns
HV pulse fall time, typical <7 ns <5.5 ns <7 ns <6 ns <6.5 ns <6 ns
Output polarity positive
HV power consumption <20 W <20 W <75 W <40 W <90 W <80 W
12V/24V power consumption 1 W 5.5 W 4 W 4.5 W 6 W 9 W
Dimensions see Fig. 12 see Fig. 11 see Fig. 11 see Fig. 11 see Fig. 11 see Fig. 11
Cooling conductive conductive or water conductive or water conductive or water conductive or water conductive or water

Driver needs to be mounted on the heatsink (excluding water cooled versions).

Heat sink temperature needs to be lower than 35 °C (95 °F) in all regimes of operation.

Please specify working voltage and required tuning range by ordering.

HV output voltage to Pockels cell is equal to HV power supply voltage.

 

Configuration examples of OEM version of PCD-UHRS series short-pulse drivers

P/N of driver PCD-UHRS-50-3.6 PCD-UHRS-400-1.5 PCD-UHRS-250-3.6 PCD-UHRS-250-2.5 PCD-UHRS-600-2.5 PCD-UHRS-600-1.8
Maximal HV rated voltage 3.8 kV 1.6 kV 3.7 kV 2.6 kV 2.6 kV 2 kV
Maximal HV operating voltage 3.6 kV 1.5 kV 3.6 kV 2.5 kV 2.5 kV 1.8 kV
Maximal HV repetition rate 50 kHz 400 kHz 250 kHz 250 kHz 600 kHz 600 kHz
Pulse duration 15-5000 ns 15-620 ns 15-1250 ns 15-1000 ns 15-400 ns 15-400 ns
HV pulse rise time, typical <7 ns <5.5 ns <7 ns <6 ns <6.5 ns <6 ns
HV pulse fall time, typical <7 ns <5.5 ns <7 ns <6 ns <6.5 ns <6 ns
Output polarity positive
HV power consumption <20 W <20 W <75 W <40 W <100 W <35 W
12V/24V power consumption 1 W 5.5 W 4 W 4.5 W 7 W 7 W
Dimensions see Fig. 14 see Fig. 15 see Fig. 15 see Fig. 15 see Fig. 15 see Fig. 15
Cooling conductive conductive or water conductive or water conductive or water conductive or water conductive or water

Driver needs to be mounted on the heatsink (excluding water cooled versions).

Heat sink temperature needs to be lower than 35 °C (95 °F) in all regimes of operation.

Please specify working voltage and required tuning range by ordering.

HV output voltage to Pockels cell is equal to HV power supply voltage.

 

Configuration examples of encased version of PCD-UHRS series short-pulse drivers

P/N of driver PCD-UHRS-250-3.6-C PCD-UHRS-250-2.5-C PCD-UHRS-600-2.5-C
Maximal HV rated voltage 3.7 kV 2.6 kV 2.6 kV
Maximal HV operating voltage 3.6 kV 2.5 kV 2.5 kV
Maximal HV repetition rate 250 kHz 250 kHz 600 kHz
Pulse duration 15-1250 ns 15-1000 ns 15-400 ns
HV pulse rise time, typical <7 ns <6 ns <6.5 ns
HV pulse fall time, typical <7 ns <6 ns <6.5 ns
Output polarity positive
HV power consumption <75 W <40 W <100 W
12V/24V power consumption 4 W 4.5 W 7 W
Dimensions see Fig. 17
Cooling water

Heat sink temperature needs to be lower than 35 °C (95 °F) in all regimes of operation.

Please specify working voltage and required tuning range by ordering.

HV output voltage to Pockels cell is equal to HV power supply voltage.

 

Configuration examples of encased version of PCD-UHR series unipolar drivers

P/N of driver PCD-UHR1-250-3.6-C
PCD-UHR2-250-3.6-C
PCD-UHR1-250-2.5-C
PCD-UHR2-250-2.5-C
PCD-UHR1-500-2.6-C
PCD-UHR2-500-2.6-C
PCD-UHR1-1000-1.8-C
PCD-UHR2-1000-1.8-C
Maximal HV rated voltage 3.7 kV 2.6 kV 2.7 kV 2 kV
Maximal HV operating voltage 3.6 kV 2.5 kV 2.6 kV 1.8 kV
Maximal HV repetition rate 250 kHz 250 kHz 500 kHz 1000 kHz
Pulse duration 100-5000 ns
HV pulse rise time, typical <7 ns <6 ns <6.5 ns <6 ns
HV pulse fall time, typical <7 ns <6 ns <6.5 ns <6 ns
Output polarity positive
HV power consumption <75 W <40 W <90 W <80 W
12V/24V power consumption 4 W 4.5 W 6 W 9 W
Dimensions see Fig. 19 see Fig. 19 see Fig. 19 see Fig. 19
Cooling water water water water

Heat sink temperature needs to be lower than 35 °C (95 °F) in all regimes of operation.

HV output voltage to Pockels cell is equal to HV power supply voltage.

Please specify working voltage and required tuning range by ordering.

 

Configuration examples of encased version of PCD-UHR series bipolar drivers

P/N of driver PCD-UHR1-1000-2.9-C
PCD-UHR2-1000-2.9-C
PCD-UHR1-350-4-C
PCD-UHR2-350-4-C
PCD-UHR1-300-4.6-C
PCD-UHR2-300-4.6-C
PCD-UHR1-250-5.2-C
PCD-UHR2-250-5.2-C
Maximal HV rated voltage 3.0 kV 4.2 kV 4.8 kV 5.3 kV
Maximal HV operating voltage 2.9 kV 4.0 kV 4.6 kV 5.2 kV
Maximal HV repetition rate 1000 kHz 350 kHz 300 kHz 250 kHz
Pulse duration 100-5000 ns
HV pulse rise time, typical <7.5 ns <7.5 ns <8.0 ns <8.5 ns
HV pulse fall time, typical <7.5 ns <7.5 ns <8.0 ns <8.5 ns
Output polarity bipolar
HV power consumption* <120 W <100 W <100 W <100 W
12V/24V power consumption 9 W
Dimensions see Fig. 21
Cooling conductive or water

*Bipolar HV power supply HV2x60Wm is specifically designed for these drivers.

Driver needs to be mounted on the heatsink (excluding water cooled versions).

Heat sink temperature needs to be lower than 35 °C (95 °F) in all regimes of operation.

HV output voltage to Pockels cell is equal to HV power supply voltage i.e. sum of positive and negative HV values

Please specify working voltage and required tuning range by ordering.

 

Configuration samples of FULL-BRIDGE version of PCD-UHR series drivers

P/N of FULL-BRIDGE driver 2PCD-UHR1-1000-2.4-C
2PCD-UHR2-1000-2.4-C
2PCD-UHR1-2000-1.6-C
2PCD-UHR2-2000-1.6-C
Base driver PCD-UHR1-500-2.5
PCD-UHR2-500-2.5
PCD-UHR1-1000-1.8
PCD-UHR2-1000-1.8
Maximal HV operating voltage 2.4 kV 1.6 kV
Maximal HV repetition rate 1000 kHz 2000 kHz
HV pulse duration range 0-5000 ns 0-5000 ns
HV pulse rise time <6.5 ns <6 ns
HV pulse fall time <6.5 ns <6 ns
Maximal capacitance of Pockel's cell < 6 pF < 6 pF
HV power consumption <160 W* <160 W*
Case see Fig. 25 see Fig. 25
Cooling water water

* Two HV power supplies HV80 Wm are recommended

Heat sink temperature needs to be lower than 35 °C (95 °F) in all regimes of operation.

HV output voltage pulse to Pockel’s cell appears as diference of pulses OUT1 and OUT2 and is lower as HV power supply voltage.

Contact Ekspla for technical details based on your request

Inquire for custom versions of drivers even if your requirement exceed indicated here parameters.

 

Ordering/Part number information

Ordering information of PCD-UHR series Pockels Cells drivers