Volume 23 Issue 12
Feb.  2016
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wang wenliang. Design of near-infrared non-polarizing beam splitter[J]. High Power Laser and Particle Beams, 2011, 23: 24-25.
Citation: wang wenliang. Design of near-infrared non-polarizing beam splitter[J]. High Power Laser and Particle Beams, 2011, 23: 24-25.

Design of near-infrared non-polarizing beam splitter

  • Publish Date: 2011-12-14
  • Under large-angle oblique incidence, the optical thin films exhibit strong polarization effects. The reflectance and transmittance for both S- and P-components will exhibit some polarization deviations. The reflection-and transmission-induced phase retardances will exhibit the same behavior. After the analysis of the physical essence within the polarization effects, a near-infrared nonpolarizing beam splitter with a reflectance of 50% in 1 500-1 600 nm spectral range was designed. It adopted a thin film stack with approximately equal equivalent admittances for both S- and P-components with the aid of simplex optimization algorithm. According to the results, in the working range of spectrum with the incident angle of 45, the splitter maintains a very low polarization ratio, and both the reflectance( transmittance) curve deviation and the reflection (transmission)-induced phase change are small.
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      沈阳化工大学材料科学与工程学院 沈阳 110142

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