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Full investigation into continuous-wave Nd:LuAG lasers on 4F3/2→4I13/2 transition around 1.3 and 1.4 μm

Zhi Lin, Jinglong Lan, Qin Cui, Xiaoxu Huang, Bin Xu, Huiying Xu, Zhiping Cai, Xiaodong Xu, Jian Zhang, and Jun Xu

Open Access Open Access

Abstract

We report a full investigation of continuous-wave diode-pumped Nd:LuAG single crystal lasers on 4F3/2→4I13/2 transition around 1.3 and 1.4 μm. In free-running mode, a maximum output power of 4.18 W is achieved for a simultaneous dual-wavelength laser operation at 1321 and 1338 nm, which represents the highest output power for Nd:LuAG laser material at a 1.3 μm emission band. Three single wavelength lasers at 1340, 1332 and 1322 nm, as well as a dual-wavelength laser at 1334 and 1338 nm, are also generated with maximum output powers of 2.39, 2.63, 2.24 and 1.23 W, respectively, with the aid of a glass etalon. Moreover, a single wavelength laser at 1353 nm is also obtained with a maximum output power of 1.53 W. Furthermore, in free-running mode, simultaneous tri-wavelength eye-safe lasers at 1419, 1432 and 1442 nm are attained with a maximum output power of 1.83 W, and a 1.08 W single wavelength laser at 1419 nm is also yielded. Most of the 1.3 μm lasers and all of the 1.4 μm lasers are demonstrated for the first time to our knowledge. Thus, this work indicates that Nd:LuAG crystal is a very promising laser gain medium for high-power continuous-wave infrared laser generation.

© 2016 Optical Society of America

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Figures (6)
Fig. 1
Fig. 1 Transmissions of IMs and OCs for 1.3 and 1.4 μm lasers.

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Fig. 2
Fig. 2 Emission spectrum of Nd:LuAG single crystal from 900 to 1460 nm. Inset: emission spectrum with respect to the 1.3 and 1.4 μm spectral regions.

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Fig. 3
Fig. 3 (a) Output powers versus absorbed powers for Nd:LuAG 1.3 μm laser in free-running mode, (b) single wavelength laser spectrum at 1338 nm at low pump powers, (c) dual-wavelength laser at 1321 and 1338 nm with the increasing of the pump powers and (d) dual-wavelength laser at the same two lines with maximum pump power.

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Fig. 4
Fig. 4 (a) Laser output powers versus absorbed powers for single wavelength lasers at 1340, 1332, 1322 nm and dual-wavelength laser at 1334 and 1338 nm, as well as corresponding laser spectra at (b) 1340 nm, (c) 1332 nm, (d) 1322 nm and (e) 1334 and 1338 nm.

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Fig. 5
Fig. 5 (a) Output powers versus absorbed powers of single wavelength 1353-nm laser and (b) Laser spectrum of the single wavelength 1353 nm emission.

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Fig. 6
Fig. 6 (a) Output powers versus absorbed powers of 1.4 μm lasers and laser spectra of (b) tri-wavelength lasing at 1418, 1432 and 1442 nm, and (c) single wavelength lasing at 1418 nm

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