Spectroscopic properties of Nd3+ doped Sc2O3:LiNbO3 crystal fibers

Burlot, R.; Moncorgé, R.; Boulon, G.

doi:10.1016/s0022-2313(96)00181-0

Cited by 4 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…, Y 6 ). The marked positions were obtained using the criterion of maximum intensity as described to characterize other materials [10] that permits us to visualize all spectra simultaneously and separate each Stark component of the 4 The number of sites and the energy position bands also seems to agree with the number and energy obtained from the site-selective excitation spectrum of figure 2. However, some bands in 4 F 3/2 (R 1 ) look larger than others (observed in figure 3 for the site α where six bands were expected and four bands observed).…”

Section: Results and Analysismentioning

confidence: 77%

Optical multi-sites of Nd³⁺-doped CaMoO₄induced by Nb⁵⁺charge compensator

Andrade

Guyot

et al. 2006

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Site-selective laser excitation and luminescence measurements at 15 K of CaMoO4 single crystal doped with Nd3+ and co-doped with Nb5+ charge compensator have been investigated in the spectral region of laser interest involving the transition. A larger than expected number of Nd3+ sites was found and a model to explain this result is presented. A partial diagram of 4F3/2 and 4I11/2 levels was constructed from the acquired data and their features are discussed.

show abstract

Section: Results and Analysismentioning

confidence: 77%

Optical multi-sites of Nd³⁺-doped CaMoO₄induced by Nb⁵⁺charge compensator

Andrade

Guyot

et al. 2006

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

“…This is lower than in LiNbO 3 :MgO:Nd systems [13]; moreover it is argued that LiNbO 3 :1.5 mol%:Sc 2 O 3 is easier to grow and has a photorefractive damage level comparable to that of LiNbO 3 :5 mol%:MgO. So, in order to have more information about that question and to make a more complete comparison with LiNbO 3 :MgO:Nd, we have studied the luminescence properties of LiNbO 3 :1% or 1.5% Sc 2 O 3 :1% Nd crystal fibres [38] grown by using the Laser Heated Pedestal Growth (L.H.P.G.) technique [39].…”

Section: Optical Results On Ndmentioning

confidence: 99%

Optical Transitions of Trivalent Neodymium and Chromium Centres in LiNbO3 Crystal Host Material

Boulon

2004

Structure and Bonding

View full text Add to dashboard Cite

LiNbO 3 (LN) is a crystal which combines excellent non-linear optical properties with the possibility of trivalent optical ion doping as rare earth ions or transition metal ions. A key problem in these trivalent optical ions-doped LN has been to determine the lattice location of the activator. This is of importance because some of their attractive features depend on the crystal field surrounding the active ion. Laser spectroscopy (LS) and channelled Rutherford backscattering (RBS) spectrometry have been applied to investigate trivalent rare earth ions as active ions, whereas Cr 3+ ions can only be studied by LS. As an example, we shall focus our attention more precisely on Nd 3+ centres in LiNbO 3 :Nd 3+ and LiNbO 3 :MgO:Nd 3+ . The Nd 3+ ions are in Li + octahedral sites, off-centred by three different amounts along the c-axis, giving place to three non-equivalent optical centres. Co-doping with MgO produces an additional optical centre (Nd-Mg), in which Nd 3+ ions are not located in octahedral lattice sites. Measurements performed on Cr 3+ -doped LN single crystals with composition varying between congruent and close to stoichiometry enabled new features to be revealed which lead us to re-interpret the optical spectra in the same way as rare earth dopants: three chromium centres (g, a, b) are sufficient to explain the main optical features. The main centre g occupies the Li + regular octahedral site whereas the centres a and b are shown to be strongly connected to the presence in their surrounding of intrinsic defects related to the crystal non-stoichiometry. Stoichiometry effects on the centre distribution and possible models to explain the origin of the different centres is discussed. In addition, a nephelauxetic broadening of the 2 EAE 4 A 2 transition in Cr 3+ caused by disorder which originates from a variation in the values of the electron-electron Racah parameters. This article has been devised as the actual state of the art of the trivalent rare earth ions and the Cr 3+ transition metal ion used as probe dopants in the LiNbO 3 crystal host.

show abstract