Advances in growth of fiber crystal by the LHPG technique. Application to the optimization of Yb3+-doped CaF2 laser crystals

Evaluation of Laser Potentialities from Concentration Quenching Analysis in Yb3+-Doped Cubic Crystals

“…G=exp[σ g σ a Nτ(N)l] [9] where σ g is the gain cross-section with respect to the quasi three-level situation for lasers between first excited and ground state, σ a is the pump absorption cross-section for the pumping wavelength, whereas N , τ(N) and l have been defined above.…”

Growth and spectroscopic properties of Ti-doped sapphire single-crystal fibers

“…The LHPG technique is based on the utilization of a CO 2 laser beam as the heating source. Limited by the laser power, the source rod is typically 0.5-1 mm in diameter [19], so this method is always adapted to explore new laser crystals. Unfortunately there are some materials that LHPG method is not suitable to be used as a growth technique, due to thermodynamic or kinetic consideration.…”

Role of monovalent alkali ions in the Yb3+ centers of CaF2 laser crystals

“…In our previous studies, Ca 1-x Yb x F 2þx crystals were grown by either simple melting or by laser heated pedestal growth (LHPG) technique (Ito et al, 2004;Boulon et al, 2006) under Ar atmosphere by growing Yb 3þ concentration gradient fiber in order to understand involved concentration quenching mechanisms. In addition, high-quality large size crystals (more than 10 inches) have also been grown by Czochralski technique under CF 4 atmosphere (Jouini et al, 2008).…”