Spectroscopic investigation of Nd3+ ion in LiNbO3, MgO:LiNbO3 and LiTaO3 single crystals relevant for laser applications

“…The breakthrough was achieved by the co-doping of MgO [2,5]. Due to the 4 F 3/2 → 4 I 11/2 transition [7], laser oscillation could be achieved in the high-gain polarization (π-polarization) at 1085 nm as well as in the low-gain polarization (σ-polarization) at 1093 nm [2,5]. Dual-wavelength emitting from a single laser medium possesses huge potential in the applications of high-precision laser metrology, laser spectroscopy, satellite laser ranging, analysis of the atmosphere, and THz research [8,9].…”

Section: Introductionmentioning

confidence: 99%

Dual-wavelength laser operation in a-cut Nd:MgO:LiNbO3

Fan

Zhao

et al. 2016

Optical Materials

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Diode-pumped dual-wavelength a-cut Nd:MgO:LiNbO 3 lasers near 1085 and 1093 nm were experimentally and theoretically investigated. The simultaneous dual-wavelength emitting was mainly attributed to the Boltzmann distribution of the occupation in the Stark-split energy-levels in manifold 4 I 11/2. Under an absorbed pump power of 7.45 W, a maximum continuous wave (CW) output power of 1.23 W was obtained, giving a slope efficiency of 21.2%. Using Cr:YAG as saturable absorber, the shortest pulse duration of 28 ns was obtained with a repetition rate of 24 kHz, resulting in a peak power of 729 W.

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“…Compared with its isomorph lithium niobate (LiNbO 3 ), the LiTaO 3 crystal is more attractive because of the smaller birefringence and higher optical damage thresholds [12][13][14]. In the case of doping Nd 3 þ and Mg 2 þ ions, the Nd 3 þ ions are perturbed by both Li-Nb and Nd-Mg lattice site, permitting two emission lines [15] and a broad emission spectra [16]. Accordingly, multi-wavelength and tunable Nd,Mg:LiTaO 3 laser can be expected.…”

Section: Introductionmentioning

confidence: 99%