期刊
OPTICS LETTERS
卷 47, 期 19, 页码 5244-5247出版社
Optica Publishing Group
DOI: 10.1364/OL.473960
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资金
- National Natural Science Foundation of China [62122049, 91850203]
- Shanghai Rising-Star Program [21QA1404600]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDA25020311]
- NSAF Joint Fund [U1930126]
YCOB crystals oriented in both the XZ and XY principal planes possess broadband phase-matching property of intrapulse difference-frequency generation and can generate few-cycle pulses tunable from 2 to 4 μm.
Yttrium calcium oxyborate (YCOB) crystals have been widely applied for generating intense near-infrared laser pulses by optical parametric amplification. Here, we show that the YCOB crystals oriented in both the XZ and XY prin-cipal planes possess broadband phase-matching property of intrapulse difference-frequency generation in the mid -infrared region. Few-cycle pulses tunable from 2 to 4 mu m are experimentally produced by using a 7.5-fs pump laser at 800 nm, in which the conversion efficiency can be as high as 2.5%. With a large-size crystal and high-power pump laser, intrapulse difference-frequency generation based on YCOB may provide a new route for directly producing intense few -cycle mid-infrared pulses. (c) 2022 Optica Publishing Group
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