Title :
A coherent photonic wavelength-division switching system for broad-band networks
Author :
Fujiwara, Masahiko ; Shimosaka, Naoki ; Nishio, Makoto ; Suzuki, Syuji ; Yamazaki, Shuntaro ; Murata, Shigeru ; Kaede, Kazuhisa
Author_Institution :
NEC Corp., Kawasaki, Japan
fDate :
3/1/1990 12:00:00 AM
Abstract :
A coherent photonic wavelength-division (WD) switching system, utilizing a coherent wavelength switch (λ switch), is proposed. In the proposed coherent λ switch, the tunable wavelength filter function is accomplished using coherent optical detection with a wavelength tunable local oscillator. The coherent photonic WD switching system has the following features; (1) low crosstalk switching for dense WDM signal, and (2) large line capacity capability. Design considerations show that 32 wavelength division channels can be available with a coherent λ switch. It is also shown that a broadband metropolitan-area-network with over 1000 line capacity is possible, using a multistage connection in the coherent λ switches. The switching function of the coherent λ switch is demonstrated in a two-channel wavelength-synchronized switching experiment, using 8-GHz-spaced, 280-Mb/s optical FSK signals
Keywords :
crosstalk; frequency division multiplexing; light coherence; optical filters; optical switches; tuning; λ switch; 2809 Mbit/s; FSK signals; broad-band networks; coherent optical detection; coherent photonic wavelength-division switching system; coherent wavelength switch; dense WDM signal; large line capacity; line capacity; low crosstalk switching; metropolitan-area-network; multistage connection; tunable wavelength filter function; wavelength tunable local oscillator; Frequency shift keying; Optical crosstalk; Optical detectors; Optical feedback; Optical fiber networks; Optical filters; Optical switches; Switching systems; Tunable circuits and devices; Wavelength division multiplexing;
Journal_Title :
Lightwave Technology, Journal of
