Multi-wavelength emission through self-induced second-order wave-mixing processes from a Nd3+ doped crystalline powder random laser.
Random lasers (RLs) based on neodymium ions (Nd(3+)) doped crystalline powders rely on multiple light scattering to sustain laser oscillation. Although Stokes and anti-Stokes Nd(3+) RLs have been demonstrated, the optical gain obtained up to now was possibly not large enough to produce self-frequency conversion. Here we demonstrate self-frequency upconversion from Nd(3+) doped YAl3(BO3)4 monocrystals excited at 806 nm, in resonance with the Nd(3+) transition (4)I9/2 → (4)F5/2. Besides the observation of the RL emission at 1062 nm, self-converted second-harmonic at 531 nm, and self-sum-frequency generated emission at 459 nm due to the RL and the excitation laser at 806 nm, are reported. Additionally, second-harmonic of the excitation laser at 403 nm was generated. These results exemplify the first multi-wavelength source of radiation owing to nonlinear optical effect in a Nd(3+) doped crystalline powder RL. Contrary to the RLs based on dyes, this multi-wavelength light source can be used in photonic devices due to the large durability of the gain medium.
Grupo de Física da Matéria Condensada, Núcleo de Ciências Exatas - NCEx, Campus Arapiraca, Universidade Federal de Alagoas, 57309-005, Arapiraca-AL, Brazil.|Departamento de Física, Universidade Federal de Pernambuco, 50670-901, Recife-PE, Brazil.
André L
AL
Moura
Departamento de Física, Universidade Federal de Pernambuco, 50670-901, Recife-PE, Brazil.|CIBAS, Universidad de Santander, Bucaramanga, Colombia.
Vladimir
V
Jerez
Grupo Física de Materiais, Instituto de Física, Universidade Federal de Goiás, 74001-970, Goiânia-GO, Brazil.
Lauro J Q
LJ
Maia
Departamento de Física, Universidade Federal de Pernambuco, 50670-901, Recife-PE, Brazil.
Anderson S L
AS
Gomes
Departamento de Física, Universidade Federal de Pernambuco, 50670-901, Recife-PE, Brazil.
Cid B
CB
de Araújo