Title :
1500-km SSMF Transmission of Mixed 40-Gb/s CS-RZ Duobinary and 100-Gb/s CS-RZ DQPSK Signals
Author :
Li, Zhaohui ; Cheng, Linghao ; Yang, Yanfu ; Lu, Chao ; Lau, Alan Pak Tao ; Tam, HwaYaw ; Wai, P.K.A. ; Wang, Chao ; Xu, Xiaogeng ; Deng, Jian ; Xiong, Qianjing
Author_Institution :
Photonic Res. Centre, Hong Kong Polytech. Univ., Hong Kong, China
Abstract :
We demonstrated transmission of eight channels of 200-GHz channel spacing and 100-Gb/s carrier-suppressed return-to-zero (CS-RZ) differential quadrature phase-shift keying (DQPSK) signals together with eight channels of 40-Gb/s CS-RZ duobinary (DRZ) signals also with 200-GHz channel spacing in order to improve the optical spectral efficiency of the wavelength-division-multiplexing system. Each DRZ channel is inserted in the middle of two adjacent CS-RZ DQPSK channels. A bit-error rate (BER) of less than 5E-4 is achieved for the 40-Gb/s DRZ channel after 1500-km SSMF transmission while a BER of 1E-3 is achieved for the 100-Gb/s CS-RZ DQPSK signals.
Keywords :
channel spacing; differential phase shift keying; error statistics; optical fibre communication; quadrature phase shift keying; spectral analysis; wavelength division multiplexing; DQPSK; SSMF transmission; bit rate 100 Gbit/s; bit rate 40 Gbit/s; bit-error rate; carrier-suppressed return-to-zero duobinary signal; channel spacing; differential quadrature phase-shift keying signal; distance 1500 km; frequency 200 GHz; optical spectra; standard single-mode fiber; wavelength-division-multiplexing system; Carrier-suppressed return-to-zero (CS-RZ); differential quadrature phase-shift keying (DQPSK); mixed transmission; modulation format; optical duobinary;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2009.2021773
