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Theoretical demonstration for signal gain in
multiple four-wave mixing processes based on cubic susceptibility
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| Liang ZHAO,Junqiang SUN,Zhefeng HU,Qian HU,Yujie ZHOU,Jing SHAO,Tianye HUANG,Jun LI, |
| Wuhan National Laboratory
for Optoelectronics, College of Optoelectronic Science and Engineering,
Huazhong University of Science and Technology, Wuhan 430074, China; |
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Abstract An insight into the signal gain in multiple four-wave mixing (MFWM) processes based on a cubic susceptibility medium is theoretically proposed and demonstrated. A dual-pumped fiber optical parametric amplification (FOPA) model is developed with the exact expressions for the signal gain and its 3-dB bandwidth successfully yielded. With these analytical expressions, we show that when pump-1 and pump-2 wavelengths tuned at 1549 and 1551.02 nm, the 3-dB bandwidth of the signal gain can be achieved at about 2253.4 nm theoretically by properly setting the pumped powers. Numerical simulations show that there is a small pinnacle emerging in the signal gain spectrum owing to the degenerate OPA process occurring. The proposed OPA model can find potential applications in all-optical wavelength conversion, optical amplifier, and all-optical sampling.
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| Keywords
fiber optical parametric amplification (FOPA)
four-wave mixing
highly nonlinear fiber
signal gain spectrum
3-dB bandwidth
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Issue Date: 05 September 2010
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