PERIODIC PULSE ELECTRIC-DISCHARGE ALL-CHEMICAL HF/DF-LASER WITH CLOSED GAS-DYNAMIC CIRCUIT IS INTENDED FOR GENERATION OF COHERENT RADIATION OF INFRARED SPECTRUM.

ALL-CHEMICAL LASER

Technical characteristics	HF	DF
spectrum, mkm	2,6-2,9	3,4-3,9
Generation energy in monopulse, MJ	70	50
Average power, W	7	5
Frequency of impulses repetition, Hz	150	150
Power consumption ,KW	1,5	1,5

Periodic pulse electric-discharge all-chemical HF/DF-laser with closed gas-dynamic circuit is intended for generation of coherent radiation of infrared spectrum.

Components of the gas mixture - SF₆, H₂ (D₂) - are non-toxic and non-aggressive. Reaction products are absorbed in the gas-dynamic circuit, where the pressure is lower than the atmosphere one.

Medical laser unit prototype is used as an instrument:

1. In ophthalmology – for enhancing eye cornea curvature;

Thickness of necrotic tissue does not exceed 5 micrometer. Healing of laser wounds is going without corneal clouding, as opposed to excimer laser keratectomy treatment.

2. In cosmetic surgery – for pilling, perforation and skin cut;

Practically painless cut (14x1x1 mm3) through laser subcutaneous anesthetic injection.

Healing of laser wounds on skin is going with good cosmetic effect.

3. In cardiac surgery – for myocardium perforation and restoration of blood supply during coronary artery disease treatment.

The diameter of trans-myocardium channel was approx. 1mm, size of thermocoagulation zone approx. 20 micrometer. Expenditure of energy on perforation of one channel (<8 J) is 5 time less as opposed to CO2-laser.

Pluses of HF-lasers in respect to microsurgery purposes are: shallow depth of laser exposure on bio tissue, short impulses duration and radiation safety for an operator’s eyes.