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Single pass gain of 77mm crystal and ceramic Yb:YAG disks are compared in the 100–200K temperature range. Experiments are performed on a laser amplifier cooled through a static low pressure helium gas cell.
Using near-infrared pump probe technique, we demonstrate ultrafast photoinduced absorption with a decay constant as short as 100 fs in a large single crystal of bismuth ferrite with high quality grown by floating zone method.
We report a systematic study of thermal effects in high-power single-pass SHG in the presence of absorption, and propose an optimum heating configuration for the crystal to minimize thermal lensing at various fundamental power levels.
We report a milestone in optical refrigeration, cooling a 10% Yb:YLF crystal to 93K (ΔT∼180K); obtaining the coldest solid-state temperature to date. Identification of transition metal impurities via mass spectrometry allows further cooling through purification.
Filamentation in different multi-photon absorption regimes was studied using different laser wavelengths in a zinc selenide crystal. The 3-photon ionization/absorption threshold was verified, and the impact of absorption on filament formation was observed.
We realized the first visible Sm3+-doped oxide laser. In Sm(6.7at.%):SrAl12O19 28mWof self-pulsed average output power at 703.0nm were achieved with 8% slope efficiency under 2É-OPSL-pumping at 479.6nm. Furthermore, detailed spectroscopic investigations were performed.
A 56% efficiency quantum memory is created by inserting a <1% efficiency memory in a low-finesse cavity. Changing the memory absorption profile by optical pumping decreases the cavity mode-spacing by >4 orders of magnitude.
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