Title :
Chirped RZ-DPSK based on single Mach-Zehnder modulator and its nonlinear transmission performance
Author :
Liu, Xiang ; Kao, Y.-H.
Author_Institution :
Bell Labs., Lucent Technol., Holmdel, NJ, USA
fDate :
7/1/2005 12:00:00 AM
Abstract :
We present a detailed analysis of positively and negatively chirped return-to-zero differential phase-shift keyed (CRZ-DPSK) signals that are generated using a single Mach-Zehnder modulator at the transmitter. Supporting CRZ-DPSK experiments at 10 Gb/s showed a nominal receiver sensitivity of -42 dBm at bit-error rate =10-9. We show that an appropriate amount of chirp, depending on the dispersion map used, enhances the nonlinear tolerance of the CRZ-DPSK signal by reducing the Gordon-Mollenauer phase noise.
Keywords :
Mach-Zehnder interferometers; chirp modulation; differential phase shift keying; error statistics; nonlinear optics; optical fibre communication; optical fibre dispersion; optical modulation; optical noise; optical receivers; optical transmitters; phase noise; 10 Gbit/s; Gordon-Mollenauer phase noise reduction; Mach-Zehnder modulator; bit-error rate; chirped RZ-DPSK; dispersion map; nonlinear tolerance; receiver sensitivity; return-to-zero differential phase-shift keying; transmitter; Chirp modulation; Differential phase shift keying; Differential quadrature phase shift keying; Nonlinear optics; Optical modulation; Optical transmitters; Phase modulation; Signal analysis; Signal generators; Voltage; Chirped return-to-zero differential phase-shift keying (CRZ-DPSK); modulation format; nonlinear transmission;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.848550
