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UV-Vis Spectroscopic Characterization of Nanomaterials in Aqueous Media
Published on: October 25, 2021
Two-photon absorption at 248 nm in ultraviolet window materials
Optics Letters
|September 12, 2009
Summary
Two-photon absorption coefficients were measured for various optical materials. These findings are crucial for designing high-brightness excimer lasers.
Area of Science:
- Materials Science
- Optics
- Laser Physics
Background:
- High-brightness excimer lasers require materials with specific optical properties.
- Understanding nonlinear optical phenomena like two-photon absorption is critical for laser design.
Purpose of the Study:
- To measure the two-photon absorption coefficients of fused silica, LiF, and several alkali earth halides.
- To assess the implications of these measurements for the development of high-brightness excimer lasers.
Main Methods:
- Utilized 0.7-picosecond, 248-nanometer laser pulses.
- Employed laser intensities ranging from 0.5 to 30 x 10^10 W/cm^2.
- Measured two-photon-absorption coefficients for fused silica, LiF, BaF2, SrF2, CaF2, and MgF2.
Main Results:
- Quantified two-photon absorption coefficients for the selected optical materials.
- Established a dataset for material selection in high-intensity laser applications.
Conclusions:
- The measured two-photon absorption coefficients provide essential data for optimizing excimer laser design.
- Material selection based on these coefficients can enhance laser performance and reliability.
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