Transverse Multimode Evolution in Non-Adiabatic Optical Micro/Nanofiber Tapers
FU Jian1, XU Ying-Ying1, TANG Shao-Fang2, LI Yang1, SUN Shuo1
1State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou 3100272Qianjiang College, Hangzhou Normal University, Hangzhou 310012
Transverse Multimode Evolution in Non-Adiabatic Optical Micro/Nanofiber Tapers
FU Jian1, XU Ying-Ying1, TANG Shao-Fang2, LI Yang1, SUN Shuo1
1State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou 3100272Qianjiang College, Hangzhou Normal University, Hangzhou 310012
摘要The multimode evolution, optical losses and wavelength response of non-adiabatic micro/nano-fiber (MNF) tapers are numerically simulated using a three-dimensional finite-difference beam propagation method. For a non-adiabatic MNF taper, it is illustrated that optical losses vary with the transition region length and the optical wavelength. We explain how the complicated multimode evolutions result in the complicated optical loss and wavelength response properties, especially when the waist diameters are large enough to allow much higher-order modes. These results may offer valuable references for trapping and guiding cold atoms in atom optics and practical application of micro/nano-devices.
Abstract：The multimode evolution, optical losses and wavelength response of non-adiabatic micro/nano-fiber (MNF) tapers are numerically simulated using a three-dimensional finite-difference beam propagation method. For a non-adiabatic MNF taper, it is illustrated that optical losses vary with the transition region length and the optical wavelength. We explain how the complicated multimode evolutions result in the complicated optical loss and wavelength response properties, especially when the waist diameters are large enough to allow much higher-order modes. These results may offer valuable references for trapping and guiding cold atoms in atom optics and practical application of micro/nano-devices.
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2010, Vol. 27 
