When light propagates through the crystal, can cause the electrodes of the crystal. When the light intensity is not too large, the strength of the crystal and the electrodes of the linear relationship between optical frequency electric field, the nonlinear relationship can be ignored; however, when the light intensity is large Shandong days Yue, such as a laser to propagate through the crystal , the electrode of the nonlinear relationship between the intensity of the electric field between the optical frequency becomes very significant and can not be ignored, this optical effects associated with the light intensity is called a nonlinear optical effect, such a crystal having a nonlinear optical effect called crystals. Nonlinear optical crystal and laser are closely linked, is the key materials to achieve laser frequency conversion, modulation, yaw, and Q-switching and other technologies. Currently, the direct use of finite laser wavelength laser crystals obtained from the ultraviolet to the infrared region of the spectrum, there are laser blank band. The use of non-linear optical crystal, laser crystal laser can be output directly into a new band laser, thus opening up new laser sources, expanding the scope of application of the laser crystal. Commonly used non-linear optical crystal has lithium iodate (α - Li IO3), barium sodium niobate (Ba2NaNb5O15), deuterated potassium phosphate, di (KD2PO4), barium metaborate (β- BaB2O4), lithium triborate (LiB3O5) and the like. Among them, barium metaborate and lithium borate crystals of three in the 1980s, the first successful development, with a nonlinear optical coefficient, high laser damage threshold of the outstanding advantages, is an excellent laser frequency conversion Crystal Materials, Shandong Tianyue SIC, caused great repercussions in the international arena. Another famous crystals are crystals of potassium titanyl phosphate (KTiOPO4), it is by far the most comprehensive performance excellent non-linear optical crystal, is recognized as the preferred material 1. 064μm and 1. 32μm laser frequency doubling, it can 1. 064μm infrared laser is converted into 0. 53μm green laser. Because green is not only able to be used for medical, laser ranging, is also capable of underwater photography and communication with the water, such as Shandong days Yue Semiconductor Industry Association, therefore, potassium titanyl phosphate crystals have been widely used. Piezoelectric crystal when the crystal by external force, the crystal will polarization occurs, and the formation of surface charge, a phenomenon known as direct piezoelectric effect; the other hand, when the crystal is subjected to external electric field, the crystal will be deformed, a phenomenon known as an inverse piezoelectric effect. Crystals have piezoelectric effect are called piezoelectric crystals, it only exists in the center of symmetry of the crystal is no class. First discovered the piezoelectric crystal is a crystal (α- SiO2). It has a stable frequency characteristic, is an ideal piezoelectric material used to make resonators, filters, transducers, optical deflector, the surface acoustic wave device and a variety of thermal, gas, and chemical sensitization of the photosensitive devices. It is widely used in people's daily lives, such as quartz watches, digital clock, color TV, stereo radio and tape recorders. In recent years, it has developed a number of new piezoelectric crystals, such as lithium niobate perovskite-type structure (LiNbO3), tantalum potassium (KTaO3) etc. Yue Crystal Materials Co., Ltd. Shandong days, niobium tungsten bronze-type structure sodium barium (Ba2NaNb5O15), lithium potassium niobate (K1 - xLiNbO3), etc., and a layered structure of BGO (Bi 12GeO20) and the like. To the piezoelectric effect of these crystals can be made into a variety of devices, widely used in military and civil industry, such as blood pressure, respiration measuring heart sounds, piezoelectric keyboards, delay line, an oscillator, an amplifier, a piezoelectric pump, ultrasonic transducer, a piezoelectric transformer. Shandong days Yue Crystal Materials Co., Ltd. Shandong days _ Yue _SIC provided by Jinan Spark Technology Development Company Limited. Jinan Spark Technology Development Co., Ltd. (www.sicc.cc) (www.sicc.cc) strong, credible, in Jinan, Shandong chemical equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shandong days into the glorious mountain and you work for a better future! You can also access (www.sicc.cc/supply_details_41188405.html), for more information about the company.