Multi-wavelength emission through self-induced second-order wave-mixing processes from a Nd3+ doped crystalline powder random laser
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2015-09
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Random lasers (RLs) based on neodymium ions (Nd3+) doped crystalline powders rely on multiple
light scattering to sustain laser oscillation. Although Stokes and anti-Stokes Nd3+ RLs have been
demonstrated, the optical gain obtained up to now was possibly not large enough to produce selffrequency
conversion. Here we demonstrate self-frequency upconversion from Nd3+ doped YAl3(BO3)4
monocrystals excited at 806 nm, in resonance with the Nd3+ transition 4I9/2 → 4F5/2. Besides the
observation of the RL emission at 1062 nm, self-converted second-harmonic at 531 nm, and selfsum-
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 Nd3+ 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.
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MOURA, André L.; JEREZ, Vladimir; MAIA, Lauro J. Q.; GOMES, Anderson S. L.; ARAÚJO, Cid B. de. Multi-wavelength emission through self-induced second-order wave-mixing processes from a Nd3+ doped crystalline powder random laser. Scientific Reports, Sttugart, v. 5, e13816, Sept. 2015.