This is a review paper of current literature in the area of
pressure effects on gaseous lasers.
This thesis discusses the mechanisms which relate the relative
power output of the 6328 A[superscript ⁰] neon transition to total and partial pressure
variations of the helium-neon gaseous laser. The operation of
the...
It is reported that the axial mode separation of a semiconductor
laser can be computed from the reflectance spectrum of a narrow
spectral range near the lasing frequency. The Kramers-Kronig dispersion
relation is used in this computation.
GaAs semiconductor laser is taken as an example. The computed
values of the...
The temporal and spatial characteristics of a laser microprobe plume were investigated using the spectroscopic methods of emission, absorption and fluorescence. The plume was produced by rapid vaporization of a small quantity (1 μg) of a solid sample using a focussed pulsed dye laser (110 MW/cm²). For absorption and fluorescence...
Structure-specific synthesis processes are of key importance to the growth of polymorphic functional compounds such as TiO₂, where material properties strongly depend on structure as well as chemistry. The robust growth of the brookite polymorph of TiO₂, a promising photocatalyst, has been difficult in both powder and thin-film forms due...
This is a review paper based on recent literature in the areas
of spherical mirror resonators and optical mode selection. The
Fabry-Perot interferometer with spherical mirrors has been widely
used as a laser resonator. The modes of oscillation, diffraction
losses and resonance condition are determined for the confocal
resonator, i.e....
A focused Q-switched neodymium-doped glass laser with power
levels ranging from 1-6 MW and with a 50-nsec halfwidth, was used
to vaporize copper metal. Experimental measurements showed that
the amount of material vaporized away from the target was not linear
with laser power and was much less than could be...
The optical Bloch equations for a two-level atom in a laser
beam with an amplitude of arbitrary time dependence are derived in
the rotating wave approximation. The light scattered by the atom
is investigated for the special case of an intense, resonant laser
beam with a sinusoidally modulated amplitude. The...
A variety of laser spectroscopic methods are employed in this
thesis research for studies of CF₃NO, an interesting model
photodissociative system, and for investigation of low energy rotations
and vibrations of small molecules and low molecular weight clusters in
free jet expansions.
Nonradiative energy decay for electronically excited CF₃NO is...