Research On Er-Doped YAG Solid Laser

The central wavelength 2.94 u m is based on high Er3+-doped YAG crystal (Er3+:YAG) . Based on the theoretical analysis, we experimentalize to the output characteristic of laser and probe into the efficiency and output power of the Er-doped YAG solid laser, moreover, we research and development a compact, no water cooled and low frequency central wavelength 2.94 u m laser sample.The laser blood sampling is the latest idea. The idea is based on focusing laser beam to pierce the finger skin, and then we can get and analyze the blood sampling. Because there is no contact the method can completely avoid the contact infection. In the paper, the master light source is a compact no water-cooled Er-doped YAG solid laser, developed by ourselves. The erbium laser output wavelength is 2.94fim, which is accordance with water's absorption peak. The water's absorption in tissues is particularly great, so the erbium laser is suitable. Simultaneously we design the laser alignment system, the laser shaping system and the focal setting system. Doing the theoretical analysis and experiments, we research and develop a medical blood-sampling instalment of laser, with the good application prospect.