Journal of Applied Physics

High-power photopreionization-stabilized carbon dioxide waveguide lasers operating at gas pressures of up to 13 atm

D. J. Brink and V. Hasson
A simple photopreionization-stabilized waveguide laser is energized effectively by fast Blumlein-type pulsers and operates at pressures of up to 13 atm. The laser has an active plasma volume of ~0.2 cm and provides 20 ns gain-switched pulses with beam energies of 10 mJ. The maximum pressures and bea ... [J. Appl. Phys. 49, 2250 (2008)] published Mon Aug 18, 2008.

Nd : Y[sub 2]O[sub 3] single-crystal fiber laser: Room-temperature cw operation at 1.07- and 1.35-mu m wavelength

J. Stone and C. A. Burrus
Single-crystal fibers have been grown from high-purity 1.5 wt% NdO : YO powder mixtures, and short lengths of the fiber in dielectric mirror resonators have been evaluated as lasers at both 1.07- and 1.35-[mu]m wavelength. The laser transition cross sections were approximately equal at the two wavel ... [J. Appl. Phys. 49, 2281 (2008)] published Mon Aug 18, 2008.

A passive nonresonant technique for pulse contrast enhancement and gain isolation

K. Sala and M. C. Richardson
A passive aperture-scalable device is described which provides high contrast enhancement of a laser pulse over baseline optical noise while maintaining efficient net transmission of the principal laser pulse. The technique, which is based upon the nonresonant phenomenon of self-induced ellipse rotat ... [J. Appl. Phys. 49, 2268 (2008)] published Mon Aug 18, 2008.

The Faraday effect in Hg[sub 1 - x]Cd[sub x]Te at CO[sub 2] laser wavelengths

R. K. Ahrenkiel, P. Weiss, D. Watkins, S. K. Gulati, and W. W. Grannemann
The optical and magneto-optical properties of crystals of HgCdTe (x=0.37) have been measured over the CO laser wavelength region. The absorption edge of this composition occurs at about 3.2 [mu]m, and the Faraday rotation consists of interband and intraband components. The latter is very large in n- ... [J. Appl. Phys. 49, 2265 (2008)] published Mon Aug 18, 2008.

Transverse self-focusing and filamentation of a laser beam in a magnetoplasma

Ashok K. Sharma
In this paper we have studied the problem of self-focusing of a Gaussian laser beam in a collisionless magnetoplasma when the direction of wave propagation is at right angles to the magnetic field. The nonlinearity arises through the ponderomotive force and subsequent redistribution of plasma along ... [J. Appl. Phys. 49, 2396 (2008)] published Mon Aug 18, 2008.

Electrode surface field and preionization effects on the spatial distribution of arcs in CO[sub 2] laser discharges

Robert R. Mitchell, Louis J. Denes, and Laurence E. Kline
We have studied the spatial distribution of arcing as a function of electrode spacing and preionization pattern in CO laser discharge mixtures, using circular electrodes which allowed a gap of up to 10 cm and a discharge volume of ~3 liters. We utilized both cathode-field enhancement with uniform pr ... [J. Appl. Phys. 49, 2376 (2008)] published Mon Aug 18, 2008.

Simplified theory of a multipass cw gasdynamic laser cavity

M. Brunne and A. Zielinski
The paper concerns a simplified analysis of the problem of the power extraction from the multipass cavity of the cw gasdynamic laser. Analytical formulas for the laser output and the resonator efficiency are given relating them to the cavity geometric features, cavity losses, number of the cavity pa ... [J. Appl. Phys. 49, 2288 (2008)] published Mon Aug 18, 2008.

Laser-shock-induced microstructural changes and a comparison with explosive-shock-induced phenomena in metals: Field-ion and electron microscopic studies

O. T. Inal and L. E. Murr
Annealed etched molybdenum and tungsten wires were field evaporated to perfection in a specially designed field-ion microscope through which a laser beam could be focused onto the perfect metal emission end form or along the wire shank. Irradiation utilizing a Q-switched laser at fluences between 22 ... [J. Appl. Phys. 49, 2427 (2008)] published Mon Aug 18, 2008.

Near-infrared laser action from acetone vapor

J. D. Barry and J. E. Brandelik
CO and CO laser activity has been produced by acetone decomposition in a glow discharge. A gas mixture of He-CHCOCH-N was used. An oxidant was not introduced. Molecular decomposition allows a nonexplicitly introduced molecule to be involved in the laser process. ... [J. Appl. Phys. 49, 2557 (2008)] published Mon Aug 18, 2008.

Single thin-active-layer visible-spectrum In[sub 1 - x]Ga[sub x]P[sub 1 - z]As[sub z] heterostructure lasers

R. Chin, N. Holonyak, Jr., R. M. Kolbas, J. A. Rossi, D. L. Keune et al.
Single active-layer visible-spectrum InGaPAs heterostructure lasers are described that exhibit quantum size effects (QSE) in photoluminescence and by means of diode injection (lambda<6300 A). Liquid-phase epitaxial (LPE) quaternary layers as thin as ~300 A have been realized. It is demonstrated that ... [J. Appl. Phys. 49, 2551 (2008)] published Mon Aug 18, 2008.

Syndicate content