✦ LIBER ✦
Optical properties and energy transfer among Nd3+ in Nd:Ca2Al2SiO7 crystals for diode pumped lasers
✍ Scribed by B. Viana; A.M. Lejus; D. Saber; N. Duxin; D. Vivien
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 840 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0925-3467
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✦ Synopsis
The energy levels of neodymium in the Nd 3~:Ca 2A12SiO7 (CAS) laser material with gehlenite structure are reported. As the Nd 3:Ca 2A12SiO7 compound presents a broad absorption around 806 nm, it is a good candidate for diode pumped laser. The 4F 372-. 41 912 and 4F 312-. 41 1112 emission have been recorded and the fluorescence branching ratios calculated from the Judd-Ofelt analysis are 0.41 and 0.47 respectively. The emission cross section at 1.06 sm ( 4F 312-. 41 1112 transition) is 5x l0_20 cm
- The decay profiles of the Nd3~emission have been analyzed for several Nd3~concentrations using the kinetic microparameters related to the cross relaxation (CDA=l.7X i0~°cm6 s~and R 0~6 A) and the energy migration probabilities (CDD= 20X l0-~°c m6 s). In the Nd: CAS laser material, the optimal concentration corresponding to the maximum ofthe fluorescence intensity is determined to be around 2.7x 1020 Nd3~ions cm3. The Nd31--Nd3~interactions are not very strong in this material as the optical concentration value is two times higher than in the Nd: YAG laser material.