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A laser created at TSU can be used for drilling of a living bone

In August the TSU Laboratory of Intelligent Diagnostic Radiation and Laser-Optical Systems and Technologies conducted experiments that confirmed that the strontium vapor laser invented by scientists of Tomsk State University can be used for the cutting and drilling of a living bone.

- We had used samples of dry bones to rebuild our strontium vapor laser installation to work on the bone tissue - said Professor Anatoly Soldatov, head of the laboratory. - And when the laser was created and experiments with dry bone were successful, we replaced it with a living bone. The results wholly confirm that the effect on the living bone at certain parameters of the laser radiation does not lead to charring.
The strontium vapor laser for use in biological tissues was developed by a scientific team led by Professor Anatoly Soldatov in collaboration with colleagues from Vanderbilt University (USA). American scientists found that the infrared radiation best suited to effect living tissue has a wavelength of 6.45 microns. But the large installation where they conducted experiments proved to be unsuitable for use in medicine. Then, scientists from the United States asked their colleagues from TSU for help to create a compact laser system with the specified parameters.

- We have ten years of studying the strontium vapor laser, working to increase its capacity, seeking to make it work at different wavelengths, - says Anatoly Soldatov. - In terms of practical applications it has a lot of prospects. The strontium vapor laser in combination with other active media in a laser beam contains from 10 to 25 wavelengths, which cover a very wide range (from 0.4 to 6.45 microns). There is a possibility to combine not only a set of wavelengths, but also to control parameters such as pulse energy and its duration, divergence, and the frequency of repetition. This makes it possible to carry out different mechanisms of influence on the object. In this case, we use a bone drilling not only of the wavelength of 6.45 microns, but also others which have wavelengths of from 1 to 3 microns, because this radiation is also absorbed by water vapor.

Scientists of TSU are the only ones in the world who work with the strontium vapor laser. Ongoing experiments confirm that this laser has a wide applicability. It can be used in medicine, for the micromachining of glass, for remote measurement of water vapor, and for other tasks.

For reference. Anatoly Soldatov is an honored inventor of the Russian Federation, a renowned expert in physics and the technology of gas lasers, recognized in scientific society in Russia and abroad. He participated in the launch of the first laser in Tomsk. He released the first monograph in the world about lasers using self-terminating transitions in metal vapors. He is an author of over 300 scientific publications and has more than 50 inventions.

Source: http://tsu.ru/english/about_tsu/news_events/60288/


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