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- W4315588437 abstract "The figure of merit (FoM) of Ti:Sapphire (Ti:Sa) crystals is a generally used means to evaluate the quality of the crystals. Despite the importance of Ti:Sa, the question of FoM measurement precision stayed out of focus, while the commercially available spectrometers provide unsatisfactory 3-sigma precision reaching 60 %. In this paper, we present a setup for a single-pass high-precision transmission measurement for three different wavelengths (532 nm, 780 nm, and 1560 nm) based on Nd:YAG and Er:YAG lasers. A synchronous detection via a double integrated sphere enabled us to achieve the transmission uncertainty of 0,01-0,03%. With the presented setup, we show that it is possible to determine the FoM values with 3-sigma precision of 7,5 %. Owing to the high FoM precision, we were able to trace spatial inhomogeneities of an unannealed Ti:Sa crystal produced by a commercial manufacturer Crytur. Our measurements demonstrate that the FoM values can be significantly affected by the crystal inhomogeneities and angular mismatch between the c-axis of the Ti:Sa and polarization orientation." @default.
- W4315588437 created "2023-01-11" @default.
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- W4315588437 date "2023-01-07" @default.
- W4315588437 modified "2023-10-18" @default.
- W4315588437 title "High-precision FoM measurement setup for Ti:Sapphire crystals" @default.
- W4315588437 doi "https://doi.org/10.48550/arxiv.2301.02922" @default.
- W4315588437 hasPublicationYear "2023" @default.
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