1500-km SSMF Transmission of Mixed 40-Gb/s CS-RZ Duobinary and 100-Gb/s CS-RZ DQPSK Signals

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...

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Veröffentlicht in:	IEEE photonics technology letters 2009-08, Vol.21 (16), p.1148-1150
Hauptverfasser:	Zhaohui Li, Linghao Cheng, Yanfu Yang, Chao Lu, Lau, A.P.T., Tam, H., Wai, P.K.A., Chao Wang, Xiaogeng Xu, Jian Deng, Qianjing Xiong
Format:	Artikel
Sprache:	eng
Schlagworte:	Bit error rate Carrier-suppressed return-to-zero (CS-RZ) Carriers Channel spacing Channels Chaos Clocks differential quadrature phase-shift keying (DQPSK) Erbium-doped fiber amplifier High speed optical techniques Keying mixed transmission modulation format optical duobinary Optical fiber polarization Optical modulation Phase shift keying Photonics Pulse modulation Quadratures Spectra
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Zusammenfassung:	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.
ISSN:	1041-1135 1941-0174
DOI:	10.1109/LPT.2009.2021773