Optical characteristics：

     Czochralski monocrystalline silicon(CZ) has a strong oxygen absorption peak at 9.1 um. When used as a transmission level material, it is mainly used in the 3-5 um band of the first infrared optical window.The thickness of Czochralski single crystal silicon has little effect on the optical transmittance in 1.2-6.7 um band, and its average infrared transmittance is over 50%.

     Because the oxygen content of zone melted silicon(FZ) is much lower than that of CZ silicon, the infrared transmittance curve of FZ silicon is fairly straight, so it can be used in the second infrared window 7-14 um band. The thickness of components in this band becomes the key parameter affecting the optical transmittance. The average optical transmittance of CZ silicon with thickness less than 1 mm is more than 50%.

Optical characteristic parameters：

          Transmission Range     ：  1.2 to 15 microns

          Refractive Index         ：  3.4223 at 5 microns

          Reflection Loss           ：  51.0% at 5 microns(2 surfaces)

          Index of Absorption    ：  1x10^-3cm^-1 at 3 microns

          dN/dT                       ：  160x10^-6/℃

          dN/dμ                       ：  10.4 microns

Product Specification：

          Classification of Crystal Growth Mode    ：MCZ-Si          FZ-Si

          Classification of Crystal Directions          ：100             111

          Type Classification of Doping Elements  ：Type N         Type p

          Purity                                              ： >99.999%(5N)

          Resistivity                                         ： 1-100Ω·cm

          Shape                                              ：Arbitrary Customization

     Optical grade single crystal silicon requires not only high purity of materials, but also strict processing accuracy of materials. Our company is based on long-term processing experience, precise processing equipment and good testing methods. It can process all kinds of silicon optical components with high requirements of shape and accuracy, and can meet all kinds of harsh requirements.