Triple-Wavelength Lasing with a Stabilized β-LaBSiO₅:Nd³⁺ Crystal

Abstract

Multi-wavelength lasers, especially the triple-wavelength laser around 1060 nm, could be produced by the 4F3/2 → 4I11/2 transition of Nd3+ and present numerous challenges and opportunities in the field of optoelectronics. The Nd3+-doped high-temperature phase of LaBSiO5 (β-LBSO) is an ideal crystal to produce triple-wavelength lasers; however, the crystal growth is challenging because of the phase transition from β-LBSO to low-temperature phase (α-LBSO) at 162 °C. This phase transition is successfully suppressed when the doping content of Nd3+ is larger than 6.3 at. %, and the Nd3+-doped β-LBSO is stable at room temperature. The local disorder of BO4 tetrahedra due to Nd3+ doping is essential to the stabilization of β-LBSO. For the first time, the β-LBSO:8%Nd3+ crystal with a dimension of 1.8 × 1.8 × 1.8 cm3 is obtained through the top-seeded solution method. The crystal shows strong optical absorption in the range of 785–815 nm, matching well with the commercial laser diode pumping source. The optical emission of 4F3/2 → 4I11/2 splits into four peaks with the highest optical emission cross section of 2.14 × 10–20 cm2 at 1068 nm. The continuous-wave triple-wavelength generation of coherent light at 1047, 1071, and 1092 nm is achieved with the highest output power of 235 mW and efficiency of 12.1%.

Optical temperature sensing with an Er3+, Yb3+co-doped LaBMoO6single crystal

“…2d. The calculated energy gap of LBMO is 4.79 eV, 40 which is slightly larger than the measured optical band gap based on DRS. Considering the calculation error, 44 we believe that the HSE03 functional can more accurately describe the band structure of LBMO.…”

“…[36][37][38] Recently, the mixture design method was firstly developed for crystal growth in our lab. 39,40 The mixture is characterized by the sum of the proportions of all components being 100%. This means that the only constrain in the mixture design experiment is x 1 + x 2 + x 3 = 1, where x 1 , x 2 , and x 3 are the mol contents of LBMO, B 2 O 3 and Li 2 Mo 2 O 7 , respectively.…”

Formation of Au@Ag Bimetallic Nanoparticles via Ion Implantation and Its Effects on Boosting the Near-Infrared Emission of Er3+ Ions in Germanate Glass for Applications in Optical Amplifiers

“…To analyze the spectroscopic properties at 1.5 μm for optical amplifier applications for GP:Er and GP:ErAu@Ag glasses, the absorption and emission cross-sections of 4 I 15/2 → 4 I 13/2 and 4 I 13/2 → 4 I 15/2 transitions were calculated. The absorption cross section σ a can be calculated by using the Beer–Lambert law: σ normala ( λ ) = 2.303 log ( I 0 I ) N l where log nobreak0em.25em⁡ I 0 I is the absorptivity from the absorption spectrum, l is the thickness of the glass, and N is concentration of Er 3+ ions (ions/cm 3 ), and the emission cross section σ e can be obtained from the fluorescence spectrum by using the Fuchtbauer–Ladenburg (FL) equation: σ normale = λ 4 A normalr 8 π c n 2 λ I ( λ ) true∫ λ I ( λ ) dλ 0.25em where λ is the wavelength, A r represents the radiative transition probability corresponding to the Er 3+ ( 4 I 13/2 → 4 I 15/2 ) transition, c is the speed of light, λ I is the emission intensity, and n is the refractive index.…”

Top-seeded solution growth, spectral analysis and laser properties of a novel Nd-doped Bi2Mo2.66W0.34O12 crystal

“…With the continuous development of laser application fields and requirements, the exploration for novel and multifunctional laser crystals has always been one of the principal study topics of researchers around the world. [4][5][6] Due to their outstanding physical, chemical and spectral properties, molybdate and tungstate crystals in the scheelite family, such as CaMoO 4 , 7 Bi 2 Mo 3 O 12 , [8][9][10] NaLa(WO 4 ) 2 , 11 NaY(WO 4 ) 2 , 12 KGd(WO 4 ) 2 , [13][14][15][16] LiGd(MoO 4 ) 2 , 17 NaGd(MoO 4 ) 2 , 18,19 and KY(MoO 4 ) 2 , 20,21 have been paid intense attention and proved to be good host materials for active ions. During the past decade, triple-molybdates with similar structures, such as KBaGd(MoO 4 ) 3 , have also been proved to be potential candidates for laser host crystals with different output wavelengths ranging from the visible to midinfrared region with different rare-earth ions doped.…”