Investigation of physical processes in the active medium of a pulsed CO₂laser responsible for variation of the laser frequency during a pulse

Abstract

We suppose that the solar neutrino problem is due only to the mechanism introduced by Ellis, Hagelin, Nanopoulos and Srednicki (EHNS) to allow pure quantum states to evolve into mixed ones. Lower limits on the EHNS parameters (α, β, γ ) are obtained. We find that γ 7.4 × 10 −22 GeV if α < 2γ and α 1.5 × 10 −21 GeV if α > 2γ , with no constraint on β. This limit is consistent with the upper limits extracted from the K 0 − K 0 system and can be detected in future experiments.

Effect of frequency detuning on the output characteristics of CO2 lasers

“…However, it has been found that even in single frequency systems, the "instantaneous" emission frequency ν g varies, i.e., sweeping of the frequency occurs. Particular aspects of frequency variation in pulsed CO 2 lasers have been examined elsewhere [4,[7][8][9][10]. The frequency sweeping present in the initial laser output is also transferred to the light converted by means of nonlinear crystals.…”

“…Thus, there is some practical interest in examining the behavior and magnitude of frequency sweep for CO 2 lasers in this case. We assume that the frequency of the laser emission coincides with the longitudinal mode ν c of the laser and obeys the equation [4,[7][8][9][10] ν g (t) = ν c (t) = ν c (0) l 0 n 0 + l a n a (0)…”