Temperature-dependent lasing and spectroscopy of Yb:Y2O3 and Yb:Sc2O3

Correlation between Luminescence and EPR Spectroscopy as Evidence of Ytterbium Pair Formation in Li6Ln(BO3)3:Yb3+ (Ln=Gd, Y) Borate Single Crystals

“…Such an energy transfer between two sites is reported by Ternane et al in a monoclinic yttrium polyphosphate. [5,8] The challenge is to explain why the luminescent study of the LLnB single crystals reveals the existence of two lines in the expected zero-line transition range. Different assumptions are discussed below.…”

“…Maintaining the research effort on new host compounds and re-evaluating the performance of well-known materials at low temperatures are mandatory to improve the thermal conductivity and the gain cross sections of solid-state optical amplifiers. [5] Low-temperature characterizations are useful to determine the crystal-field splitting of the spin-orbit multiplets (Stark components) and to attribute the different bands observed to the absorption and emission spectra. The zero-line transition associated with the radiative de-excitation between the lowest excited level and the ground state (transition 5!1) can be used as a local probe to count the number of sites occupied by the ytterbium ions.…”

Sm3+-doped Sc2O3 polycrystalline ceramics: Spectroscopic investigation

“…There are many studies (technological, spectroscopic, laser emission, etc.) of RE 3+ doped sesquioxides, especially with Nd [13,14], Yb [15,16], Er [17,18], Ho [19,20], Tm [21,22], etc., but up to now no investigations on Sm 3+ in sesquioxide ceramics have been reported. In fact, there are few data on Sm 3+ in sesquioxides, they refer to Y 2 O 3 single crystals [23] and Y 2 O 3 or Lu 2 O 3 nano-phosphors [24,25].…”

Host-dependence of Trivalent Erbium (Er3+) Spectra Relevant to Solid-state Lasers: Yttrium Aluminum Garnet (YAG) and Sesquioxides

“…This gives an extremely small -qua ntum defect,‖ meaning that the absorbed pump photon has only slightly more energy than the emitted laser wavelength, so that very little of the pump photon's energy is deposited in the gain medium as heat. This approach has been demonstrated by our own group and others for several laser ions, notably trivalent ytterbium (Yb 3+ ), Er 3+ , and Ho 3+ (3)(4)(5)(6). The diode lasers at wavelengths suited to pump Yb 3+ are particularly efficient, but that ion emits at wavelengths where the eye is quite sensitive to damage.…”