Journal
OPTICS LETTERS
Volume 46, Issue 4, Pages 785-788Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.418215
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Funding
- National Natural Science Foundation of China [51772172, 51890863, 52025021]
- Future Plans of Young Scholars at Shandong University
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This study demonstrates tunable difference frequency generation (DFG) of an oxide La3Ga5.5Nb0.5O14 (LGN) crystal pumped by near-infrared lasers for the first time. Tunable lasers in the wavelength range from 4.4 to 5.7 μm and 4.56 to 5.6 μm were achieved under type II and I phase-matching conditions, with the maximum output energy of 13.1 μJ.
We demonstrate the tunable difference frequency generation (DFG) of an oxide La3Ga5.5Nb0.5O14 (LGN) crystal pumped by near-infrared lasers with nanosecond pulses for the first time to our knowledge. The type I and II phase-matching conditions of DFG were calculated in the mid-infrared region. With the processed LGN crystals, tunable lasers in the wavelength range from 4.4 to 5.7 mu m and 4.56 to 5.6 mu m were achieved under type II and I phase-matching conditions, respectively, with the maximum output energy of 13.1 mu J, which agreed well with the theoretical calculation. This work provides the kind of promising mid-infrared nonlinear crystals for the pumping of nanosecond pulsed lasers as well as a tunable mid-infrared laser source at a wavelength over 5 mu m in further photonic applications. (C) 2021 Optical Society of America
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