Performance evaluation of UV sources for lidar fluorosensing of oil films.

A laboratory experiment is discussed which simulates lidar fluorosensing of oil films on the sea surface at UV wavelengths. Three different mixtures of lasing gases, KrF, XeCl and N2 , were used while a fourth wavelength was given by a dye laser. It turns out that films having a thickness as low as 0.

Two-wavelength operation of a double-pass planar dye laser amplifier.

The simultaneous multiple line operation of a double pass dye laser amplifier is reported. Standard schemes have been used to generate two independently tunable lines and to scan one narrow line linearly around a fixed one. A simple, new scheme is illustrated, which allows symmetric splitting of narrow laser lines.

Tunable superradiant emission from a planar dye laser.

A new, simple scheme to tune a double-pass, superradiant dye laser is reported. A planar cell with a thickness below 100 microm filled with a highly concentrated (4-5 x 10(-)-M/liter) solution of Rhodamine 6G in ethanol is used. An unsaturated gain value of 1.

Graded-gain dye laser amplifiers: an experimental investigation.

The influence of inhomogeneous distributions of gain and refractive index produced by the pumping radiationon the performance of dye laser amplifiers is discussed. Experimental measurements in capillary cylindrical cells and planar cells are reported for single-pass, double-pass, and ring configurations. Gain factors up to 8.