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Synthetic Diamonds Now Super Efficient Lasers.
In addition to diamonds being the prized gem for engagement rings and known to be the hardest cutting element available, research now being carried out at Macquarie University in the UK is showing it also to be a super efficient laser material.
Associate Professor Richard Mildren and his colleagues at the Macquarie University Photonics Research Center discovered it was possible to generate a coherent laser beam from man-made diamond in late 2008. They have now demonstrated diamond lasers with efficiency higher than almost all other materials.
The speed at which heat travels through diamond is the highest of all known materials, and it is hoped that this property will enable us to simultaneously miniaturize the device and increase the laser beam power to unprecedented levels.
The diamonds used in the laser research are colorless, approximately eight millimeters long, and weigh a bit less than a carat. They are grown to the researcher's specifications using a process called chemical vapor deposition that essentially creates the crystal lattice carbon by carbon atom and layer by layer on top of a large flat diamond crystal substrate. The synthetic diamond forms the core component of what is called a Raman laser, a type of laser that is optically stimulated rather than electrically powered.
Diamond is also the most transparent material known to man, in terms of the range of light wavelengths (or colors) that can pass through the material. Mildren said this would enable researchers to select from a huge range of laser wavelengths, such as in the far infrared, and hence potentially tap into a broad range of applications.
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