New medical application of laser
The laser created at TSU can be used for drilling live bone
In August, experiments were conducted in the laboratory of intelligent diagnostic radiation and laser-optical systems and technologies of TSU, which confirmed that the strontium vapor laser, invented by scientists of Tomsk State University, can be used for cutting and drilling living bone.
– So far, we have used dry bone samples to rebuild our strontium vapor laser system to work on bone tissue, – says the head. the laboratory is Professor Anatoly Soldatov. – And when such a laser was created and experiments with dry bone were successful, we replaced it with a live one. As a result, we received one hundred percent confirmation that exposure to living bone under certain parameters of laser radiation does not lead to charring.
A strontium vapor laser for use on biological tissues was made by a scientific group led by Professor Anatoly Soldatov in collaboration with colleagues from Vanderbilt University (USA). American scientists have found that infrared radiation with a wavelength of 6.45 microns is best suited for influencing living tissues. But the large-sized installation on which they conducted experiments turned out to be inconvenient for use in medicine. Then scientists from the USA turned to their colleagues from TSU for help – to create a compact laser system with the specified parameters.
– We have been researching a strontium vapor laser for ten years, working on increasing its power, making it work at different wavelengths, – says Anatoly Soldatov.
From the point of view of practical application, it has a lot of prospects. In a strontium vapor laser, in combination with other active media, one laser beam contains from 10 to 25 wavelengths that cover a very wide range (from 0.4 to 6.45 microns). It is possible to combine not only a set of wavelengths, but also to control parameters such as pulse energy and its duration, divergence and repetition rate. This makes it possible to implement different mechanisms of influence on the object. In this case, we use not only a wavelength of 6.45 microns for drilling bones, but also others that have wavelengths from 1 to 3 microns, since this radiation is also absorbed by water vapor.
TSU scientists are the only ones in the world who work with a strontium vapor laser. The experiments carried out confirm that such a laser has wide possibilities for application. It can be used in medicine, for glass micro-processing, for remote measurement of water vapor and for other tasks.
For reference. Soldatov Anatoly Nikolaevich is an honored inventor of the Russian Federation, a well–known specialist in the field of physics and technology of gas lasers, recognized in scientific circles in Russia and abroad. Participated in the launch of the first laser in Tomsk. He published the world's first monograph on self-limited transition lasers in metal vapors. Author of more than 300 scientific publications and more than 50 inventions.
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25.09.2015