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PCD-UHR series OEM Cavity Dumper Drivers

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

 

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. Next pages of the catalog presents tables of different versions of the drivers built as variations of voltage, repetition rate and rise/fall time. That three main parameters are mutually dependent. Higher voltage means longer rise/fall time, and higher repetition rate is limited by voltage. However, all the drivers can work at 1 MHz and even higher repetition rate in burst mode not exceeding specified average HV power. Connection diagram can be PUSH-PULL 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. PCD-UHR series drivers has two modifications by control inputs. PCD-UHR1 drivers are controlled by one triggering pulse while rising edge turns on high voltage to Pockels cell and falling edge turns off – see Fig. 4. for reference. PCD-UHR2 drivers are controlled by two triggering pulses that are applied to separate inputs of the driver, see Fig. 3.

Pulse regeneration technique

Gives possibility to operate push-pull drivers very long output pulse, and full bridge drivers get very low repetition rate. Pulse regeneration does not work with bipolar and short-pulse driver (see Fig. 5.).

 

Selection chart

Below chart presents summary of full line of PCD-UHR series drivers. This chart helps to choose optimal driver for your application. Horizontal axis means repetition rate, vertical voltage. Lower voltage and lower repetition rate means lower price.

Selection chart of PCD-UHR drivers

General specifications table for PCD-UHR 1)

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 24 +1/-10 V, <150 mA 12±0.5 V; <150 mA on request 24±1 V, <150 mA

1) 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.

 

 

Ordering information for PCD-UHR drivers

Ordering information for PCD-UHR drivers

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
Cooling conductive 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.

* Pulse duration of PCD-UHR2 series drivers can be extended using pulse regeneration

 
 

Specific features of Short-pulse PCD-UHRS drivers

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

 

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
Range of HV operating voltage 2.6 - 3.6 kV 0.6 - 1.5 kV 2.6 - 3.6 kV 1.5 - 2.5 kV 1.5 - 2.5 kV 0.8 - 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
Cooling conductive 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
Range of HV operating voltage 2.6 - 3.6 kV 1.5 - 2.5 kV 1.5 - 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 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
Cooling 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.

* Pulse duration of PCD-UHR2 series drivers can be extended using pulse regeneration.

 

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 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.
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.

* Pulse duration of PCD-UHR2 series drivers can be extended using pulse regeneration.
** Bipolar HV power supply HV2×60Wm is specifically designed for these drivers.

 
 

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
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
HV power consumption <160 W **
Case see Fig. 25
Cooling water

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

* Full-Bridge drivers are generally designed for operation at high repetition rate. However, low repetition rate pulsing can be achieved using pulse regeneration technique.
** Two HV power supplies HV80Wm are suggested.