Abstract Recently, a research team from the University of Strathclyde in the UK has developed a new high-performance multi-functional Raman laser using the characteristics of diamond. This laser can produce a higher energy beam than the existing one. The MAN laser has a wider range of colors. The technology will open...
Recently, a research team from the University of Strathclyde in the UK has developed a new high-performance multi-functional Raman laser using the characteristics of synthetic diamond. This laser can produce a higher energy beam than the existing one. The MAN laser has a wider range of colors. The technology may open new applications for the treatment of skin lesions, diabetes-induced eye disease treatment and air pollution testing, and aerospace engineering. The research project is sponsored by the UK Engineering and Physical Sciences Research Council (EPSRC). 
Feature 1: The first tunable diamond Raman laser. The color of the beam of the laser can be adjusted according to actual needs. For example, vascular lesions require the laser to provide a high-energy yellow and orange beam to treat the lesion without causing damage to surrounding tissues, while a typical Raman laser This level of technology is not achieved. An important factor in supporting this technology is that the superior optical properties of diamonds enable the laser to produce a range of colors that are beyond the reach of conventional lasers.
Feature 2: Continuous diamond Raman laser. Lasers that produce only short-pulse beams are not suitable for medical treatment and other applications (for example, short-pulse lasers can damage the micro-tissue of the eye); this new type of diamond Raman laser is used to treat highly sensitive lesions. Corresponding acoustic interference will occur.
Professor Martin Dawson, who led the project, said the new laser could produce light from the ultraviolet region of the electromagnetic spectrum to the visible region to the infrared region. This means that many of the technical gaps in previous laser applications will be supplemented and improved.
Conventional Raman lasers use silicon materials when changing the color of the beam. Due to the limitations of the silicon material itself, the energy and color range of the laser are very small. For example, the limited thermal conductivity of silicon materials greatly limits the laser output. The general optical properties are not effective in producing useful beams. In contrast, diamond's superior thermal conductivity, hardness, and optical properties make it an ideal laser material.
The project's lead researcher Alan Kemp said that the application of diamond single crystals to the laser field can be said to open a new door to technology applications. One of the most critical benefits is a small piece of diamond single crystal that produces enough energy for the laser. In the past, traditional Raman lasers required 3-6 cm of material; now, the new laser requires only 2-6 mm of diamond single crystal to produce the same amount of light. This breakthrough has made lasers more widely used in space-constrained technologies, such as aerospace technology and medical fields where high-energy lasers require large amounts of space.
The team has been working closely with Element Six, the world leader in synthetic diamond manufacturing. Compared to natural diamonds, synthetic diamonds are affordable and more suitable for laser technology because synthetic diamonds provide more precise optical properties in the manufacturing process, which is unmatched by natural diamonds. (Compiled from " Diamonds Are a Laser Scientist's New Best Friend ")
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