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Transmission bandwidth of the two-mode fiber link

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5 Author(s)
K. Kitayama ; NTT Public Corp., Tokai, Ibaraki, Japan ; Y. Kato ; S. Seikai ; N. Uchida
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The transmission bandwidth of the two-mode fiber link is investigated both experimentally and theoretically. It is shown that the experimental bandwidth as a function of wavelength is accurately predicted by using the individual fiber transfer functions and the mode conversion matrix at a splice. The bandwidth is maximized at the wavelength where the overall group delay time difference between the LP01and LP11modes becomes zero, showing the so-called modal equalization effect. It is experimentally certified that the 3 dB bandwidth over 2 GHz is obtained in the wide two-mode-propagation spectral region around 1.3 μm for 5.2 km long two-mode fiber link for the maximum output power launching condition, due to the relatively large attenuation of the LP11mode after long propagation.

Published in:

IEEE Journal of Quantum Electronics  (Volume:18 ,  Issue: 11 )