Development of a broadband dielectric beam splitter with reduced spectral wavefront error

Michael Vergöhl; Chris Britze; Stefan Bruns; Jennifer Ahrens; Bernd Schäfer; Klaus Mann; Volker Kirschner

doi:10.1117/12.2313668

6 June 2018 Development of a broadband dielectric beam splitter with reduced spectral wavefront error

Michael Vergöhl, Chris Britze, Stefan Bruns, Jennifer Ahrens, Bernd Schäfer, Klaus Mann, Volker Kirschner

Proceedings Volume 10691, Advances in Optical Thin Films VI; 1069118 (2018) https://doi.org/10.1117/12.2313668
Event: SPIE Optical Systems Design, 2018, Frankfurt, Germany

Abstract

A broadband beam splitter coating with the reflecting range from 400 to 900 nm and the transmitting range from 920 to 2300 nm was developed. To avoid absorptive losses at low wavelengths, Ta₂O₅ was chosen as the high index material. A new setup based on a Hartmann-Shack sensor was built to measure the wavefront error and its spectral dependence. An area of 120 mm diameter was measured. While in a standard coating, large resonant-like wavefront errors occur, an optimized coating with significantly reduced spectral wavefront error was designed and produced.

Citation Download Citation

Michael Vergöhl, Chris Britze, Stefan Bruns, Jennifer Ahrens, Bernd Schäfer, Klaus Mann, and Volker Kirschner "Development of a broadband dielectric beam splitter with reduced spectral wavefront error", Proc. SPIE 10691, Advances in Optical Thin Films VI, 1069118 (6 June 2018); https://doi.org/10.1117/12.2313668

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