Field-driven super/subradiant lasing without inversion in three-level ladder scheme.

A model of a superradiant laser comprising of N three-level systems driven by two pumping lasers is considered in semiclassical approximation. Steady-state equations for density matrix elements are solved both analytically and numerically. Various properties of generated light are investigated.

Multimirror autodyne lidar for local detection of hostile gases.

We describe an autodyne lidar with multiple external mirrors by using an analytical approach presented previously [Appl. Opt. 41, 7087 (2002)].

Analytical estimation of the parameters of autodyne lidar.

An analytical approach for a calculation of the parameters of autodyne lidar is presented. Approximate expressions connecting the absorption coefficient and the distance to the remote target with both the lidar parameters and the measured quantities are obtained. These expressions allow one to retrieve easily the information about the atmosphere from the experimental data.