Gain measurement of RF discharge excited slab CO2 laser.

Modeling the Discharge Loading of Radio Frequency Excited Co2 Slab Lasers

A Long Pulse Discharge Excited ArF Laser

An X-ray preionised, discharge excited ArF excimer laser, = 193 nm, has been studied in the long pulse regime. The laser performance is found to be primarily dependent on the discharge stability, and therefore, on the gas composition, preionization timing and the pumping power. Using X-ray preionization and prepulse-mainpulse excitation, laser pulselengths of up to 120-ns full-width at half-max...

Study of Geometrical-Dependence of Glow Discharge on Gain Coefficient in a TE-N2 Laser

Based on a set of experiments, using a transversely exited (TE) oscillator-amplifier N2-laser system (OSC-AMP) with the AMP effective length of 31cm, measurements have been carried out for small signal gain, g0, and saturation energy density, Es, for different AMP gap separations. It was found that the gain-value depends on the AMP electrode gap separation, d<su...

Slab selective, regularized RF shimming

Introduction RF shimming is a well-known technique, where amplitudes and phases of a transmit RF coil array are optimized to obtain a homogeneous B1 profile, i.e., to compensate wave propagation effects at main fields of 3T or above (see, e.g., [1]). Among other anatomies, legs are particularly prone to wave propagation effects due to their bi-cylindrical geometry, resulting in significant sign...

Measurement of the spatiotemporal dynamics of simple transverse patterns in a pulsed transversely excited atmospheric CO2 laser

A study of the spatiotemporal evolution of a pulsed CO2 laser is performed using an experimental setup which allows transverse pattern recordings with 1-ns resolution. A rich laser dynamics, hidden until now behind temporal averages, is uncovered. Features like spontaneous symmetry breaking, mode beating, and phase locking are observed and theoretically interpreted using Maxwell-Bloch equations...