期刊
OPTICS LETTERS
卷 39, 期 20, 页码 5802-5805出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.39.005802
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资金
- Ministerio de Economia y Competitividad through Plan Nacional [FIS2011-30465-C02-01]
- Catalan Agencia de Gestio d'Ajuts Universitaris i de Recerca (AGAUR)
- Fundacio Cellex Barcelona
- LASERLAB-EUROPE [228334]
- SGR
- ICREA Funding Source: Custom
The performance of potassium niobate (KNbO3), MgO-doped periodically poled lithium niobate (MgO:PPLN), and potassium titanyl arsenate (KTA) were experimentally compared for broadband mid-wave infrared parametric amplification at a high repetition rate. The seed pulses, with an energy of 6.5 mu J, were amplified using 410 mu J pump energy at 1064 nm to a maximum pulse energy of 28.9 mu J at 3 mu m wavelength and at a 160 kHz repetition rate in MgO:PPLN while supporting a transform limited duration of 73 fs. The high average powers of the interacting beams used in this study revealed average power-induced processes that limit the scaling of optical parametric amplification in MgO:PPLN; the pump peak intensity was limited to 3.8 GW/cm(2) due to nonpermanent beam reshaping, whereas in KNbO3 an absorption-induced temperature gradient in the crystal led to permanent internal distortions in the crystal structure when operated above a pump peak intensity of 14.4 GW/cm(2). (C) 2014 Optical Society of America
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