The stokes constants for simple quantal models

R. L. Anderson, Tai‐ichi Shibuya, and Carl E. Wulfman

J. C. White, Don O. Henderson

Threshold characteristics for an anti-Stokes Raman laser based on inverted, metastable TI * (6p(2)P degrees (3/2)) atoms are studied. Raman upconversion of a tunable dye laser at 535 to 378 nm is observed with an overall tuning range of 1125 cm(-1) for a single-pass laser device. The anti-Stokes pump-laser threshold varies inversely as the square of the detuning from the intermediate Raman level, except in a region ~50 cm(-1) to either side of the resonance, where the threshold is constant. These observations are explained in terms of group-velocity dispersion effects and are in good agreement with a simple theoretical model.

Zafar Ahmed

We present the case of quantal transmission through a smooth, single-piece exponential potential, V(x) = -V0ex/a, in contrast to the piecewise continuous potentials, as an intersecting model to demonstrate the analytic extraction of transmission (reflection) coefficient. Several other aspects of quantal transmission are also discussed in this simple and exactly solvable model.

Sergio Rosati, Adelchi Fabrocini, M. Viviani

Luis Lorenzo Sánchez-Soto, Alfredo Luis