抄録
Frequency conversion techniques using nonlinear optical materials are simple and useful to obtain lasers ranging from visible to ultra-violet region. Recently new nonlinear optical crystals have been or being developed for this purpose. Since KDP and LAP can be grown to big size, they are suitable for big laser systems of laser fusion experiments. New crystals KTP, BBO and LBP are promising for high power, high repetition lasers and optical parametric oscillators. For small power lasers such as diode lasers, potassium niobate, lithium niobate and KTP are used. Many new organic materials are being developed in place of these inorganic materials. Laser properties of these inorganic and organic crystals are described.
