Title :
Chirped return-to-zero modulation by imbalanced pulse carver driving signals
Author :
Winzer, P.J. ; Dorrer, C. ; Essiambre, R.J. ; Kang, I.
Author_Institution :
Bell Labs., Holmdel, NJ, USA
fDate :
5/1/2004 12:00:00 AM
Abstract :
We demonstrate a simple way of generating chirped and alternate-chirp return-to-zero signals of various duty cycles by means of a sinusoidally driven dual-drive Mach-Zehnder modulator. The amount of inherently bit-synchronized chirp is tuned by varying the imbalance of the drive signals´ amplitudes or their relative delay. High temporal resolution measurements of the intensity and phase of the modulated optical field are obtained at 20 and 40 Gb/s using the spectrogram technique.
Keywords :
chirp modulation; optical communication equipment; optical fibre communication; optical modulation; synchronisation; 20 Gbit/s; 40 Gbit/s; bit-synchronized chirp; chirped return-to-zero modulation; dual-drive Mach-Zehnder modulator; duty cycles; imbalanced pulse carver driving signals; Chirp modulation; Delay; Intensity modulation; Optical modulation; Phase measurement; Phase modulation; Pulse modulation; Signal generators; Signal resolution; Spectrogram;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.826036