The Lomonosov Moscow State University scientists developed a growth technology of single crystals for creating a unique eye-safe laser
A team of the Lomonosov Moscow State University scientists and the Belarusian National Technical University has created a unique laser, which is a compact light source with wavelengths harmless to the human eye. The development can be used in medicine, communications systems and also in research. The works are published in Journal of Crystal Growth and Optics Letters.
‘In collaboration with our colleagues of the Center for Optical Materials and Technologies, Belarusian National Technical University, we have developed a highly efficientdiode-pumped eye-safe laser, which can be used in ophthalmology, communication systems and ranging’, says Nikolay Leonyuk, Professor, Department of Crystallography and Crystal Chemistry, Geological Faculty, the Lomonosov Moscow State University. The development of such laser became possible to the fact that the team of scientists had created a laboratory growth technology of single crystals with desired properties.
The emission with wavelengths of 1500 — 1600 nm is agreeably safe for the eyes and seems prospective for practical applications in medicine, ranging (determining the distance from the observer to the object), communication systems andoptical location. This feature is explained with, first, the fact that the light-refracting system of the eye (cornea and crystalline lens) have a sufficiently high absorption coefficient in this part of the spectrum, so only a small fraction of the energy reaches the sensitive retina. Second, the radiation in the 1500 — 1600 nm spectral range suffers low losses passing through the atmosphere, and it makes advantages for their applications in telecoms.
Learn more: A laser for your eyes