Use Of Laser Diode Research Articles

Optical Problems in Use of Laser Diode

Optical Problems in Use of Laser Diode

Electrical Problems in Use of Laser Diode

Electrical Problems in Use of Laser Diode

Plasma ionization enhancement by laser line radiation

The possibility of increasing the degree of ionization in a plasma, by use of incident laser wavelengths matched to specific atomic transitions, is theoretically investigated. Such electron production occurs via a multistep process involving laser excitation of neutral atoms to electronic levels near the continuum and subsequent ionization of these atoms through collisions with thermalized plasma electrons. Detailed calculations for atomic oxygen, nitrogen, carbon, and cesium indicate that present state-of-the-art pulsed lasers are capable of raising 10 to 10 cm~ electron densities by a factor of two. Use of laser-diode and lasershock tube combinations for diagnostic studies of recombination processes is discussed briefly.