Study And Fabrication Of Space Optical Communication Laser Filter Film

Optical system plays an important role in space optical communication, optical thin-film has become the key technology of the optical components. At the same time, it is important to make the optical thin-film which meet requirements. The text introduces that how to design and fabricate the laser filter film aiming at four bands of laser work of532nm,808nm,1064nm and1550nm, chosing Ti3O5and SiO2as high and low refractive index materials,by means of the design software of film system, adopting the method of electron beam evaporation and ion assisted deposition. The transmissivity of substrate after coating film at808nm is above90%,532nm,1064nm and1550nm reflectance greater than99%.It focuses on half-wave hole in808nm transmission area,and improves laser damage threshold of film by cleaning the substrate,reducing the absorption of the film and vacuum annealed.The laser clear filter meets the requirements of the system after a performance test and evaluation.