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Layered optical thin-film allpass dispersion equaliser for compensation of dispersion slope of optical fibres

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7 Author(s)
Jablonski, M. ; Res. Center for Adv. Sci. & Technol., Tokyo Univ., Japan ; Takushima, Y. ; Kikuchi, K. ; Tanaka, Y.
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The authors propose and demonstrate novel coupled two-cavity allpass filters realised entirely as thin-film structures for dispersion slope compensation of optical fibres. The filters have centre wavelengths tunable over 15 nm. By cascading two such filters, the dispersion slope can be adjusted between -4.5 and -12.0 ps3 over a compensation bandwidth between 2.4 and 1.2 nm, respectively. A combination of two of the cascaded filters enables transmission of 1.6 ps pulse trains at 1550 nm through 60 km of dispersion-shifted fibre without waveform distortion

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Electronics Letters  (Volume:36 ,  Issue: 13 )