765-HV High-Voltage Pulse Generator

1Overview

The 765-HV is a very fast high-voltage pulse generator built to drive capacitive loads. It produces pulses of up to plus or minus 50 Vpp into a capacitive load, with a rise and fall time below 400 ps. The pulse-width range is unusually wide, spanning 1 ns at the short end to 8 s at the long end, so a single instrument covers narrow gating pulses and long hold intervals without a change of hardware.

Operating mode runs from single-shot up to 400 MHz, which gives the instrument both deliberate event-by-event control and high repetition rates from the same front end. The combination of a fast edge, a wide pulse-width range, and a high-rep-rate ceiling is what defines the 765-HV: it is shaped for loads where edge speed and timing flexibility matter more than raw power into 50 ohms.

The 765-HV traces its design heritage to DEI, now a division of Berkeley Nucleonics. Parameters not listed on this page, including amplitude resolution, jitter, connector types, power, and physical dimensions, are available in the published datasheet or on request.

2How It Works

The 765-HV is optimized for capacitive loads rather than a matched 50 ohm termination. Capacitive loads, such as Pockels cells and electro-optic modulators, present a reactive impedance that a conventional 50 ohm pulser is not built to drive cleanly. The 765-HV output stage is designed to charge and discharge that capacitance fast, which is what preserves the sub-400 ps edge at the load.

Edge speed sets the upper limit on how sharply the load can be switched. A rise and fall time below 400 ps means the instrument can define crisp optical or deflection transitions, gate a detector with a narrow window, or open and close a modulator with little smearing at the edges.

The wide pulse-width range and the single-shot-to-400-MHz operating mode together cover the timing axis. Short pulses down to 1 ns serve fast gating and switching. Long pulses out to 8 s serve hold-and-release sequences and slow bias events. Single-shot operation supports careful, one-event-at-a-time experiments, while the high-rep-rate ceiling supports continuous or burst duty where throughput matters.

Where a numeric detail is not stated on this page, including amplitude resolution, jitter, trigger and monitor outputs, connectors, and power, that information is available in the published datasheet or on request. No values beyond the table in the next section are implied here.

3Specifications

The parameters below are the published preliminary specifications for the 765-HV. Where a parameter is not listed, the detail is available in the published datasheet or on request. All values are subject to verification against the published BNC datasheet.

4Applications

The 765-HV is built for high-voltage switching into reactive loads where the edge has to stay fast. Typical applications include:

• Pockels cell driving. Fast high-voltage switching of electro-optic Pockels cells for Q-switching, pulse picking, and cavity dumping, where a sub-400 ps edge defines a clean optical transition.
• Electro-optic modulators. Driving the capacitance of EO modulators with a fast edge and a wide pulse-width range, from narrow gating pulses to long hold intervals.
• Deflection and extraction plates. Pulsing deflection or extraction electrodes in beam-line and particle-handling instruments, where the load is capacitive and timing flexibility matters.
• Fast detector gating. Gating fast detectors with narrow, well-defined windows, taking advantage of single-shot control through to high repetition rates.

The shared thread across these applications is a capacitive load that has to be switched quickly and on a flexible timeline. The 765-HV is shaped for exactly that role: a fast edge, a wide pulse-width range, and rep-rate coverage from single-shot to 400 MHz.

5Ordering Information

Configuration depends on the load, the required pulse-width range, and the rep-rate profile of your application. Contact Berkeley Nucleonics to confirm the configuration that fits your test, and to request the full published datasheet.

Contact

For a quote, configuration help, or application support, reach the Berkeley Nucleonics team.

Email: info@berkeleynucleonics.com
Phone: 800-234-7858