Effect of cerium codoping in Er3+,Ce3+:NaLa(MoO4)2 crystals

Abstract

The detailed polarized spectroscopic investigation of math and math states of Er3+ ions in Czochralski-grown NaLa(MoO4)2 single crystals doped with Er3+ and codoped with Ce3+ as a function of cerium concentration is presented. The main results of room-temperature lifetime investigation show that the math lifetime reduces by about 50 times from the solely Er-doped sample to the crystal codoped with 50 at. % of Ce, while in the same experimental conditions, the lifetime of the math level reduces by less than two times in the most heavily Ce codoped sample. This result looks very promising from the point of view of obtaining low-threshold 1.5-μm laser oscillation

Growth, Thermal and Spectral Properties of Er3+-Doped and Er3+/Yb3+-Codoped Li3Ba2La3(WO4)8 Crystals

“…The stimulated-emission cross-sections were calculated by the Füchtbauer-Ladenburg (F-L) formula [44], [45],where A q is the spontaneous emission probability for q polarization, I q ( λ ) is the fluorescence intensity as a function of wavelength. The peak emission cross-sections are about 0.81×10 −20 , 1.23×10 −20 and 0.84×10 −20 cm 2 for E||X , E||Y and E||Z respectively, which are comparable to other co-doped crystals, such as 1.89×10 −20 cm 2 for Er 3+ /Yb 3+ : KY(WO 4 ) 2 [46], 0.71×10 −20 cm 2 for Er 3+ /Yb 3+ : LaPO 4 [47] and 0.95×10 −20 cm 2 for Ce 3+ /Er 3+ NaLa(MoO 4 ) 2 [48].…”

Concentration-dependent luminescence and energy transfer of flower-like Y2(MoO4)3:Dy3+ phosphor

“…Molybdates are important inorganic compounds and have exhibited some excellent performance in the fields of catalysts, lasers and ionic conductors [19][20][21]. Recently, RE 3+ doped molybdates are also studied widely on the purpose of seeking for novel luminescence materials for W-LEDs due to the special properties of MoO 4 2− group [4,[22][23][24].…”

Er 3 + -doped BaY2F8 crystal waveguides for broadband optical amplification at 1.5μm

“…Other rare-earth doped crystal structures, such as disordered crystals, 17 are currently under investigation for improving the amplifier gain flatness still ensuring extremely broad gain bandwidths without PDG effects. Other rare-earth doped crystal structures, such as disordered crystals, 17 are currently under investigation for improving the amplifier gain flatness still ensuring extremely broad gain bandwidths without PDG effects.…”