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A wide-band guided-wave periodic multi/demultiplexer with a ring resonator for optical FDM transmission systems

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4 Author(s)
Oda, K. ; NTT Labs., Kanagawa, Japan ; Takato, N. ; Toba, H. ; Nosu, K.

A wide-band guided-wave periodic multi/demultiplexer with a ring resonator for optical frequency-division-multiplexing (FDM) transmission systems is demonstrated. This periodic multi/demultiplexer consists of a Mach-Zehnder interferometer and ring resonator. It has a flat wide bandwidth and sharp cutoff regions. The authors describe theoretical analysis, design method, and experimental results of the multi/demultiplexer. The fabricated periodic multi/demultiplexer with a ring resonator has 5-GHz channel frequency separation at the 1.55-μm wavelength region. Measured average loss was 4.8-dB and the average crosstalk was -13.2 dB. At 0.5-dB loss up from the minimum loss level, a width of 4.0 GHz was measured. This `0.5-dB bandwidth' is 1.8 times wider than that of the conventional Mach-Zehnder type periodic multi/demultiplexer

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Lightwave Technology, Journal of  (Volume:6 ,  Issue: 6 )