Title :
Wavelength-selective cross connect featuring wide flat passband and high cascadability for WDM optical networks
Author :
Maeda, Hideki ; Sumida, Masatoyo ; Tada, Yasuhiko ; Imai, Takamasa
Author_Institution :
NTT Network Service Syst. Labs., Kanagawa, Japan
Abstract :
A new reconfigurable wavelength-selective optical cross connect (OXC) featuring wide flat passband and high cascadability is proposed. It is demonstrated by 10-Gb/s /spl times/ 8-channel wavelength-division-multiplexing (WDM) transmission (0.8-nm channel spacing) over 4000 km. In the transmission line end with a single OXC, the electrical signal-to-noise ratio (SNR) degradation caused by inserting the proposed OXC is negligible, unlike the 1-dB SNR degradation with a conventional OXC. In the transmission line with an eight-unit OXC cascade, the bandwidths yielding 3-dB SNR degradation for the proposed OXCs, and the conventional OXCs, are 0.6 and 0.1 nm, respectively. The cascade of the proposed OXCs has such a wide passband, that there is nearly no narrowing compared to the 0.8-nm channel spacing.
Keywords :
Bragg gratings; optical fibre communication; optical fibre couplers; optical interconnections; reconfigurable architectures; telecommunication channels; telecommunication signalling; wavelength division multiplexing; 10 Gbit/s; 4000 km; 8-channel WDM transmission; 80 Gbit/s; SNR degradation; WDM optical networks; channel spacing; electrical signal-to-noise ratio; high cascadability; reconfigurable wavelength-selective optical cross connect; transmission line; transmission line end; wavelength-selective cross connect; wide flat passband; wide passband; Channel spacing; Degradation; Fiber nonlinear optics; Nonlinear optics; Optical fiber networks; Optical filters; Optical switches; Passband; WDM networks; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
