Abstract
We perform an optical vestigial sideband (VSB) filtering using a pair of Fabry-Perot (FP)
filters. The transmittance curve of each FP filter is made to have sharp skirts using an offset
between input and output coupling fibers. Moreover, the accurate periodicity of FP filters in the
optical frequency domain enables the simultaneous VSB filtering of a large number of optical
channels. With this VSB filtering technique, we transmit 12.5-GHz spaced
64 × 12.4-Gb/s wavelength-division-multiplexing channels over a
single-mode fiber up to 150 km without any dispersion compensations. When the channel spacing is
reduced to 10 GHz, we achieve the spectral efficiency of 1 bit/s/Hz in conventional optical
intensity modulation systems up to 125 km.
© 2013 Optical Society of Korea
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