Numerical analyses of splice losses of photonic crystal fibers |
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Authors: | Zhongnan Xu Kailiang Duan Zejin Liu Yishan Wang Wei Zhao |
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Institution: | aCollege of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, China;bState Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China |
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Abstract: | Splice losses between a photonic crystal fiber (PCF) and a single mode fiber (SMF) or a PCF are numerically investigated by using finite element method (FEM) with the circular perfectly matched layer (PML). Results show that the splice loss between a SMF and a PCF with air holes completely collapsed can reach many times of that between a SMF and a PCF without air-hole collapse. We calculate the rotation losses between two identical PCFs of three kinds: large mode area, polarization maintaining and grapefruit. It is shown that for the large mode area PCF and the grapefruit PCF, the rotation losses are sensitive to the wavelength when the rotation angle is larger than zero degree. The non-circular mode field distribution is the main source of the rotation loss. |
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Keywords: | Splice loss Rotation loss PCF FEM PML |
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