Stanislav A. Tul'skii

Frequency discrimination in overtone supersonic chemical HF laser

A cw supersonic chemical HF laser with dichroic mirrors and external cavity has been investigated on the first overtone regime. The most intensive line P2-0(4) output power was greater than for any fundamental component.

Action of pulse-periodic and continuous IR radiation on light-controlled vanadium dioxide mirrors

The results of an experimental research of action of the intensive mid IR-range pulse-periodic laser radiation on VO2-mirrors are represented. The damage thresholds of VO2-mirrors are defined for pulse-periodic and continuous radiation and the analysis of the mechanism of their destruction is carried out. The results of numerical simulation of dynamics of switching of VO2-mirrors under the action of pulse-periodic radiation are presented.

Amplification of image brightness by means of the photodissociative iodine laser

A possibility of the amplification of image brightness by the active medium of the photodissociative iodine laser have been demonstrated. The brightness of the test-object image with spatial frequency of 10 mm-1 was amplified 1600 times for Q-switch lasing action and 250 times for free- running one. The contrast of amplified image was equaled 0.8 in both occasions. The smallest input signal achieved the level of 10-13 J per pixel.

Fullerene-doped polyimide systems as effective optical power limiting materials in visible and IR ranges

The optical limiting of the laser radiation over visible and IR ranges in organic material based on polyimide has been studied. The role of the donor-acceptor interaction mechanism in manifestation of organic molecules nonlinear-optical properties has been established. The fullerene-doped photosensitive polyimide structures have been determined to be effective optical limiting materials for attenuating a power density of more than 2 - 4 J(DOT)cm-2.

Intracavity wide-angle beam pointing in mid-IR gas lasers

The present work is the further evolution of our studies on wide-angle intracavity beaming in 3-10.6-micron gas lasers by space-time light modulators.

Four-wave mixing in inverted medium of the photodissociative iodine laser

In this paper recording possibilities of non-stationary gratings in active medium of photodissociative iodine laser and using four-wave mixing for phase conjugation in its own medium were experimentally investigated for the first time.