Abstract

The ever-increasing demand for fiber transmission capacity requires increases in both spectral efficiency and usable optical bandwidth. Recently, the total transmission window has been enlarged to include C-, L- and S-bands and multiple-band transmissions were demonstrated at 40 Gbps.^1–4 However spectral expansion with band per band management requires increasingly complex and expensive equipment, and bandwidth gaps, that cannot be used for transmission, are produced between the bands.

© 2002 Optical Society of America