Russian scientists develop a minimally traumatic and inexpensive ceramic laser scalpel

July 20, 2016

Scientists from MIPT and their colleagues have developed a novel compact and powerful ceramic-based laser - it will be used as a minimally traumatic and inexpensive laser scalpel for surgical operations, and also for cutting and engraving composite materials. The results of the study have been published in Optics Letters.

Today, lasers are used everywhere: in consumer electronics devices, in medicine, metallurgy, metrology, meteorology, and many other areas. Laser beams occur due to the effect of stimulated emission in an active medium, which could be a gas, liquid, crystal, or glass. The wavelength of a laser and the efficiency of converting energy into radiation are both dependent upon the parameters of the active medium.

Ivan Obronov, a researcher at MIPT, and his colleagues from the Institute of Applied Physics of the RAS and the company IRE-Polus used a ceramic obtained from compounds of rare-earth elements - lutetium oxide with added thulium ions (Tm3+:Lu2O3). It was the thulium ions that enabled the ceramic to generate laser radiation.

"Ceramics are a promising type of medium for lasers because they are produced by sintering powders into a polycrystalline mass. They are cheaper and easier to manufacture than single crystals, which is extremely important for mass adoption. In addition, it is easy to alter the chemical composition of ceramics, which in turn alters the laser properties," explains Obronov.

The laser they have developed converts energy into radiation with an efficiency of more than 50%, while other types of solid state lasers have an average efficiency of approximately 20%, and it generates infrared radiation with a wavelength of about 2 microns (1966 and 2064 nanometres). The wavelength is what makes this laser so useful for medical purposes.

"Radiation from the most common infrared lasers, with a wavelength of about 1 micron, has very little absorption and penetrates deep into biological tissue, which causes coagulation and large areas of "dead" tissue. A surgical scalpel needs to "operate" at a very specific depth, which is why 2-micron lasers are used, as they do not damage underlying tissue," says Obronov.

According to him, doctors usually use 2-micron flashlamp-pumped holmium lasers, but these devices are very expensive, relatively bulky, and are not very reliable.

"Ceramic lasers have a significant competitive advantage; they are cheaper to manufacture, simpler and more reliable, and approximately four times more compact than holmium lasers. They will be ideal for surgical use," says Obronov.

Another potential application of ceramic lasers is the composite industry. Widely used 1-micron lasers are good at cutting metal, but polymers are practically transparent to them. A 2-micron ceramic laser, on the other hand, can effectively cut and engrave plastics, such as composite materials.

"Composites are increasingly being used to produce technological equipment such as aircraft. The wing of the new Russian MS-21 aeroplane is almost entirely made of composites. A ceramic laser could also be a useful tool for production industries," concludes Obronov.
-end-


Moscow Institute of Physics and Technology

Related Radiation Articles from Brightsurf:

Sheer protection from electromagnetic radiation
A printable ink that is both conductive and transparent can also block radio waves.

What membrane can do in dealing with radiation
USTC recently found that polymethylmethacrylate (PMMA) and polyvinyl chloride (PVC) can release acidic substance under γ radiation, whose amount is proportional to the radiation intensity.

First measurements of radiation levels on the moon
In the current issue (25 September) of the prestigious journal Science Advances, Chinese and German scientists report for the first time on time-resolved measurements of the radiation on the moon.

New biomaterial could shield against harmful radiation
Northwestern University researchers have synthesized a new form of melanin enriched with selenium.

A new way to monitor cancer radiation therapy doses
More than half of all cancer patients undergo radiation therapy and the dose is critical.

Nimotuzumab-cisplatin-radiation versus cisplatin-radiation in HPV negative oropharyngeal cancer
Oncotarget Volume 11, Issue 4: In this study, locally advanced head and neck cancer patients undergoing definitive chemoradiation were randomly allocated to weekly cisplatin - radiation {CRT arm} or nimotuzumab -weekly cisplatin -radiation {NCRT arm}.

Breaking up amino acids with radiation
A new experimental and theoretical study published in EPJ D has shown how the ions formed when electrons collide with one amino acid, glutamine, differ according to the energy of the colliding electrons.

Radiation breaks connections in the brain
One of the potentially life-altering side effects that patients experience after cranial radiotherapy for brain cancer is cognitive impairment.

Fragmenting ions and radiation sensitizers
The anti-cancer drug 5-fluorouracil (5FU) acts as a radiosensitizer: it is rapidly taken up into the DNA of cancer cells, making the cells more sensitive to radiotherapy.

'Seeing the light' behind radiation therapy
Delivering just the right dose of radiation for cancer patients is a delicate balance in their treatment regime.

Read More: Radiation News and Radiation Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.
Can't connect to localhost. Errorcode: 1203