40 Gbit/s, 16-ary (4 bit/symbol) optical modulation demodulation scheme.

Authors :: Sekine, K.
Kikuchi, N.
Sasaki, S.
Hayase, S.
Hasegawa, C.
Sugawara, T.
Source :: Electronics Letters (Institution of Engineering & Technology); 3/31/2005, Vol. 41 Issue 7, p430-432, 3p
Publication Year :: 2005
Abstract: A practical 16-ary amplitude-phase-shift-keying (16APSK) optical modulation/demodulation scheme (4 bit/symbol) with a combination of multilevel amplitude and phase modulations is proposed., and its feasibility is successfully demonstrated for the first time. The spectral width of return-to-zero 16APSK signal is only 0.27nm (33.75 GHz) at 20 dB down, even with 40 Gbit/s modulation. [ABSTRACT FROM AUTHOR]