Investigation of the output characteristic of a rotating ring gas laser

Abstract

Equations previously derived for the volume and internal energy of a simple monatomic liquid, using approxlmate geometric theory, are used to calculate the specific heats Cv, Cp and volume V of liquid argon as a function of pressure and temperature. A Lennard-Jones 12-6 interatomic pair potential is used. The results are compared with the correspondmg experimental curves. The qualitative features of the (P, V ) isotherms are reasonably reproduced, and at high pressures the densities are within 25% of the experimental values. The agreement of the specific heats is poorer, although the correct order of magnitude is predicted by the theory.

Influence of nonlinear dispersion of the refraction index on the Sagnac effect in semiconductor ring lasers

“…The origin for this is the optical drag effect. Experimentally, a decrease of ∆ν has been demonstrated in a gas RL when a quartz plate had been inserted into the cavity [17]. This observation confirms the effect of the refractive index as it is in the denominator of the Eq.…”

“…Notice that this Eq. (17)(18)(19) relates to square ring, and its "diameter" is actually the length of the side of the square. But the quantitative result appears the same as for a circular ring.…”

Sagnac effect in ring lasers and ring resonators. How does the refractive index of the optical medium influence the sensitivity to rotation?

“…The only study on this was published about forty years ago by Privalov and Filatov [33], who experimented on an RGL resonator with a perimeter L 0X85 m, into which two quartz plates 40 mm thick were introduced at Brewster's angle to the beam. The experiment measured the frequency difference of the counterpropagating waves Dn in a rotating RGL both in the absence and in the presence of the plates, with the change in the area and perimeter of the resonator due to light refraction in the plates taken into account.…”

“…As it happens, however, different papers give different versions of the same expression in those cases where only a part of the RR resonator or of an RL is filled. For example, Refs [33,34,37,41] discuss versions of expressions (4) and (6) for a resonator partially filled with several optical media with different n; these versions are presented in Refs [28±30].…”

“…The only excep-tion was given by Refs [33,34,37,41], pointing to significant differences among Eqns (1)±(7). Occasionally, expressions for the resonance frequency difference between RL or RR counterpropaging waves in the presence of an optical medium vary even from one work to another by the same author.…”