SCIENTISTS MAKE THE SMALLEST COMB LASER SYSTEM WITH AMAZING CHARACTERISTICS

Russian and Swiss scientists managed to install a hypersensitive chemical laser sensor on a small normal silicon chip.

The academic manager of Russian Quantum Center of Moscow State University, the late professor Mikhail Gorodetsky, managed two years ago to make photon microchip that allows having laser ray with unusual spectrum resembling comb in form.

This spectrum used to require large appliances in order to have.

Gorodetsky reported then that the technology his scientific team has developed allowed minimizing the device 100 thousand times.

The traditional devices that perform the same job were all about cubic which volume is one cubic meter, whereas Gorodetsky and his team’s device is one cubic centimeter.

These “comb” pluses represent an interesting case for scientists and engineers for the pluses allow transferring radio signals from spectrum to optical bandwidth and vice versa.

Consequently, they significantly raise the accuracy of “GPS” receptors, clocks, spectrum measuring devices and astronomical devices.

The device depends basically on “Micro Resonator” and it is simply a ring made of special material like silicon nitride or magnesium fluoride where light moves in circles and refracts off the device/ring walls.

The walls of the device are made in a manner where specific pluses magnify and others fade, and this allows having laser pluses with “comb” spectrum.

Professor Gorodetsky and his team have achieved a great achievement in the practical execution of this technology last year.

They managed to apply this technology to work with poor light sources, and this provided an opportunity for the scientists to think about the practical execution of this idea.

However, the scientists’ team had to solve another problem which understands how to manufacture all the optical device components from materials that suite the abilities and methods of “printing” the micro maps and replace the complex device components such as lens and mirrors which cannot be manufactured widely.

The Russian scientists and their Swiss associates managed to overcome all these obstacles by using small laser diodes based on indium and phosphor and by Nano resonators made of silicon ingot and nitrogen using printing technology in layers method.

By employing this approach, the scientists came to a resonator with almost perfect properties and a size of one millimeter.

They also managed successfully to run the device with laser where it generates a self-stable laser beam which capacity reaches 100 mill watts.

The scientists assure that it is possible to install these devices on the chips not only used in manufacturing sensors, but also in manufacturing high-speed communication devices, laser radars and other devices that depend on high-resolution comb optical properties.

Source: (Novosti) 

 

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