Spectral-splitter coatings in laser systems for the visible and infrared regions

Котликов Е.Н., Хонинева Е.В., Прокашев В.Н., Тропин А.Н. Спектроделительные покрытия в лазерных системах для видимой и инфракрасной областей спектра // Оптический журнал. 2009. Т. 76. № 11. С. 27–31.

Kotlikov E.N., Khonineva E.V., Prokashev V.N., Tropin A.N. Spectral-splitter coatings in laser systems for the visible and infrared regions [in Russian] // Opticheskii Zhurnal. 2009. V. 76. № 11. P. 27–31.

E. N. Kotlikov, E. V. Khonineva, V. N. Prokashev, and A. N. Tropin, "Spectral-splitter coatings in laser systems for the visible and infrared regions," Journal of Optical Technology. 76 (11), 693-696 (2009). https://doi.org/10.1364/JOT.76.000693

This paper describes examples of the synthesis and fabrication of optical coatings that operate in the mid-IR region and the visible region simultaneously. In particular, it tells how to separate the radiations of CO2 and He-Ne lasers by means of interference coatings that transmit (or reflect) the radiation of a CO2 laser and simultaneously reflect (or transmit) pilot radiation in the visible region, including the radiation of a He-Ne laser. Structures based on doped BaF2 films are considered that reflect the visible range and simultaneously operate as antireflection coatings in the IR region. The use of metal-dielectric coatings makes it possible to implement structures that reflect radiation in the IR region and simultaneously transmit radiation in the visible and near-IR regions of the spectrum. Examples are given of the synthesis and practical implementation of this type of coatings.