期刊
OPTICS LETTERS
卷 40, 期 7, 页码 1338-1341出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.40.001338
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资金
- National Natural Science Foundation of China [61307109, 61475023]
- Beijing Natural Science Foundation [4152037]
- National High-Technology Research and Development Program of China [2013AA031501]
- Specialized Research Fund for the Doctoral Program of Higher Education [20120005120021]
- Fundamental Research Funds for the Central Universities [2013RC1202]
- State Key Laboratory of Information Photonics and Optical Communications (BUPT) of China
- Hong Kong Scholars Program [PolyU G-YZ45]
- Research Grant Council of the Hong Kong Special Administrative Region China [PolyU5272/12E]
We demonstrate experimentally an enhanced intermodal four-wave mixing (FWM) process through coupling positively chirped femtosecond pulses into the deeply normal dispersion region of the fundamental mode of an in-house fabricated photonic crystal fiber (PCF). In the intermodal phase-matching scheme, the energy of the pump waves at 800 nm in the fundamental mode is efficiently converted into the anti-Stokes waves around 553 nm and the Stokes waves within the wavelength range of 1445-1586 nm in the second-order mode. The maximum conversion efficiency of eta(as) and eta(s) of anti-Stokes and Stokes waves can be up to 21% and 16%, respectively. The Stokes frequency shift Omega is 5580 cm(-1). The fiber bending and intermodal walk-off effect of pulses do not have significant influence on the nonlinear optical process. (C) 2015 Optical Society of America
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