20 February 2015 Radiation tests on erbium-doped garnet crystals for spaceborne CH4-Lidar applications
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A test campaign for assessing the radiation hardness of different Erbium-doped garnet crystals including Er:YAG and a compositionally tuned Er:YAG/Er:LuAG mixed garnet is reported. Tests with proton and gamma radiation have been performed with parameters mimicking a 3-year low-earth-orbit satellite mission like MERLIN or ADM-Aeolus. For each test sample broadband transmission spectra in the wavelength range of 500 nm – 1700 nm and characteristic laser curves from a test laser oscillator have been measured. Radiation-induced losses have been calculated from the obtained data. The results indicate that gamma radiation is the dominant loss source with about 0.5 %/cm radiation-induced losses for the nominal dose of the chosen mission scenario.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ansgar Meissner, Ansgar Meissner, Martin Kreitler, Martin Kreitler, Miroslaw Cubera, Miroslaw Cubera, Philipp Kucirek, Philipp Kucirek, Bastian Gronloh, Bastian Gronloh, Dominik Esser, Dominik Esser, Marco Höfer, Marco Höfer, Hans-Dieter Hoffmann, Hans-Dieter Hoffmann, "Radiation tests on erbium-doped garnet crystals for spaceborne CH4-Lidar applications", Proc. SPIE 9342, Solid State Lasers XXIV: Technology and Devices, 93420H (20 February 2015); doi: 10.1117/12.2076122; https://doi.org/10.1117/12.2076122

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