Electric pulses can induce various changes in cell dynamics and properties depending upon pulse parameters; however, pulsed power generators for in vitro and ex vivo applications may have little to no flexibility in changing the pulse duration, rise- and fall-times, or pulse shape. We outline a compact pulsed power architecture that operates from hundreds of nanoseconds (with the potential for ...

We report the demonstration of high-average-power passively Q-switched laser oscillation from Fe2+ ions in zinc selenide. A semiconductor saturable absorber mirror was used as a passive Q-switch element. Using a 60% R outcoupler, the pump-limited output power was 515 mW. The spectral center of the laser was 4045 nm. The pulse repetition frequency (PRF) at maximum power was ∼850 kHz with a corre...

Abstract All‐solid‐state switches are one of the core components pulsed power supply systems. However, voltage level a single switch is limited. By optimizing chip structure, can be improved. Due to immaturity production process and positive correlation between blocking on‐resistance switch, it difficult improve continuous forward current simultaneously. The series‐connected way increase switch...

A new output structure for class E power amplifier (PA) is proposed in this paper. A series LC resonator circuit, tuned near the second harmonic of the operating frequency is added to the output circuit. This resonator causes low impedance at the second harmonic. The output circuit is designed to shape the switch voltage of the class E amplifier and lower the voltage stress of the transistor. T...

we propose a new ring resonator side-coupled m-z interferometer all-optical switch throughthe pumped nonlinear directional coupler. by controlling pump power p to lead the coupler reflectivityr approaching to 1, the resonator finesse will be enhanced dramatically, and then the minimumswitching power in silica-based practice devices can be obtained. as a sample, we use a nonlinearcoupler made by...

We report on the detection of high-contrast and narrow Coherent Population Trapping (CPT) Ramsey fringes in a Cs vapor cell using a simple-architecture laser system. The latter allows the combination of push-pull optical pumping (PPOP) and a temporal Ramsey-like pulsed interrogation. An originality of the optics package is the use of a single Mach-Zehnder electro-optic modulator (MZ EOM) both f...

This paper presents the design and testing of several different configurations spiral generator, designed to trigger high current switches in next generation pulsed power devices. In particular, it details development generators that utilize new ultrafast thyristor technology as an input switch, along with a polarity dependent output gap improve efficiency generator design. The produced 50 kV f...

Heavy-duty opening switches are the most critical components in high-voltage pulsed power systems with inductive energy storage. For industrial applications such as pulsed corona processing, long lifetime, high repetition rate, high reliability and high efficiency are required. At the Ioffe Institute, an unconventional high-voltage switching mechanism has been found, based on the fast recovery ...

Previous searches for radio pulsar wind nebulae (PWN) suggest that only the youngest and most energetic pulsars power PWN. However the selection effects associated with such searches are severe, in that emission from a faint compact PWN will be masked by that from its associated pulsar. This has motivated us to search for radio PWN using the technique of pulsar gating, which allows us to “switc...

By using a water transmission line, current wave shaping was demonstrated for a fast capillary Z-pinch discharge recombination soft x-ray laser study. The pulsed power system consists of a water capacitor, a gap switch, a transmission line, and a capillary plasma load. A voltage wave initiated at the water capacitor propagates toward the capillary load through the transmission line. Control of ...