The high-density uv light source in the respects of information storage, microscopic instruments and chemical analysis has wide application prospects

According to the American physicists organization nets November 29 reports, the existing uv light source of power is low, bulky and expensive, the university of Michigan researchers have developed a more intelligent way to create a density of uv light source, and needs less energy, on information storage, microscopic instruments and chemical analysis has wide application prospects. The study is published in the latest issue of the "optical express ".

Researchers develop a optical resonance implement, can change thel cheap telecom infrared light into high energy uv laser beam. The resonance device is a millimeter of lithium niobate echo the existent resonance, make the internal to be high precision structure and the surface become very smooth by polishing, when the input beam through the internal resonance circuit, it will get energy.

The researchers explained, the new type of resonance is a four times frequency laser generator, can continuous firing ultraviolet light. In the experiment, they drive telecom infrared beam combined with resonance, through a diamond prism produce ultraviolet, visible, near infrared and infrared four spectrum, and collected by the multimode fiber.

"If change the laser from the green to blue, its efficiency will drop, if want to turn to ultraviolet laser is much more difficult. The law is put forward by Einstein the earliest, to explain why green laser designator contains all is not green laser, it actually puts a red laser wavelength into two of green laser." The people who is the leader of this study from the university of Michigan power engineering and computer science, Associate professor Molnar.Galloxi said "we optimized the structure of optical resonance, can get more energy  in wide range of light waves, with little power of the infrared light produced low-cost and wavelength adjustable uv light source."

Galloxi also points out that uv light source can be widely used in chemical exploration, hd medical imaging, high precision integrated circuit printing and expanding computer memory. But the shorter of the target wavelength, the more difficult the laser is generated, and the efficiency will also lower. Double frequency conversion is like a loudspeaker louder, get a new frequency of sound. New technology driven beam through the nonlinear medium, can generate light branch and doubled, and obtain the ultraviolet frequency and energy is four times as the original input beam, and the wavelength is a quarter of the original.