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A newly developed self-cooling fiber laser

The researchers from the UK produced a self-cooling fiber laser. This fiber laser is based on a silica fiber laser design. The scientists are going to create fiber laser-based devices that could achieve exceptional purity and frequency stability. That will allow avoiding the necessity of external cooling, for example, using a water-based cooling system.
A self-cooling fiber laser with a silica fiber laser module can be applied for the development of progressive fiber laser systems. These fiber laser systems are useful for low-power, high-precision metrology and information transportation.
The cooling was successfully achieved when the researchers decreased the energy level of the light. The tests’ results demonstrate that the silica fiber laser module getting colder upon light excitation. The scientists also used anti-Stokes fluorescence to achieve cooling. This means an addition of a rare-earth ion to the fiber laser module. The ion absorbs the light from the laser beam and then produces it at a higher energy level. As a result, the fiber laser module temperature is getting lower. 
The process is a complicated task because of the ytterbium that is usually taken during the test. Ytterbium ions can take impurity and release heat energy. This process is called “concentration quenching”. The researchers created a glass composition with the necessary for the experiment quantity of ytterbium to avoid this effect. 
The light frequency and its power were more stable because there were no changes in the temperature of a self-cooling of fiber laser design. That helped to preserve the cooling effect. 
The tests prove that the fiber laser system is capable of supporting high-power and large-scale laser applications in the terms of increasing performance efficiency. There were also developed two additional silica fiber laser applications. The scientists intensified the laser beam at the same time preserving the negative average temperature change. 
According to the researchers who developed these constructions, there is still a lot to improve in the future. The extracting percentage, as well as the level of efficiency, are at a low level. That’s why this newly developed technology can’t be implemented and needs some time for adoption for high-power laser applications.
Optromix Inc., headquartered in Cambridge, MA, USA, is a manufacturer of laser technologies, optical fiber sensors, and optical monitoring systems. We develop and manufacture a broad variety of Fiber lasers, СО 2 lasers, Ti: Sapphire lasers, Dye lasers, and Excimer Lasers. We offer simple Erbium laser and Ytterbium laser products, as well as sophisticated laser systems with unique characteristics, based on the client’s inquiry.
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