Shutter Driver

MODEL 825B
ANALOG MODULES, INC.
SOLID-STATE POCKELS CELL DRIVER
 ADJUSTABLE OUTPUT TO -3.5kV
 30ns RISETIME, 150μs RECOVERY
 RUGGED SOLID-STATE DESIGN
 SELF-CONTAINED HIGH VOLTAGE POWER
SUPPLY
 COMPACT SURFACE MOUNT CONSTRUCTION
 OPTO-ISOLATED OR TTL TRIGGER OPTIONS
DESCRIPTION:
The 825B Series Pockels cell drivers are designed for continuous pulsed applications, such as
controlled Q-switching of lasers. Solid-state MOSFET technology is used, giving excellent trigger
noise immunity and a smooth output waveform. This technique eliminates common problems
associated with krytron, avalanche and transformer drivers. Amplitude is continuously variable by
adjusting the internal high voltage power supply. Options for triggering include an active high
opto-isolator and TTL logic. Pulse amplitudes to -3.5kV are available.
SPECIFICATIONS:
Trigger Input TTL/CMOS compatible, positive logic,
> 3.0V, high impedance, internally limited to
+5V via 1k load (825B-1)
Opto-Isolated, active high current of
2.5mA to 9.0mA, 2kΩ impedance (825B-2)
Pulsewidth 300ns to 25μs
Repetition Rate Up to 100Hz at 3.5kV into 47pF load
See graph for alternate voltage/load limits
Burst mode permissible
Power +15VDC 0.5V at 20mA to 100mA
depending on PRF and output voltage
Temperature
Operating -40 to +85 C
Storage -55 to +125 C
Connectors
Input 4 pin connector
Output 12" flying leads
Output
Voltage 0 to -3.5kV
Load Tested with 47pF load, 66.7M
Risetime 40ns, 30ns typical at -3.5kV, 25 C
Recovery 150μs
Pulsewidth 1 to 3μs at 97%
T
delay
in-out < 300nsec (typical)
T
jitter
< 5nsec (typical)
Voltage Control Internal multi-turn trimpot
External (add -EXT to part number)
When using external mode:
4V control yields 0V output
8.2V control yields -3.5kV output
Monitor HV Monitor lead to monitor HV prior to
pulse (add -HV to part number)
MTBF >1,000,000 hours per Bellcore SR-332
Ground Fixed, Controlled, 25 C
Size 3.73" L x 1.25" W x 0.48" H
Weight 1.8 oz.
Caution: Mounting hardware must be Non-Conductive.
Nylon hardware is provided.
Specifications subject to change without notice.
APPLICATIONS:
Driving E-O Q-Switches for Q-Switching Solid-State Lasers, High Voltage Pulser
126 BAYWOOD AVENUE ♦ LONGWOOD, FLORIDA 32750-3426 ♦ USA
[phone] ♦ FAX [phone] ♦ E-mail: [e-mail]
www.analogmodules.com 08/2013
SOLID-STATE
POCKELS CELL DRIVERS