20-Gb/s Polar RZ 4-PAM Transmission Over 20-km SSMF Using RSOA and Direct Detection

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We demonstrate 20-Gb/s upstream transmission in the wavelength-division-multiplexed passive optical network based on reflective semiconductor optical amplifiers (RSOAs) and direct-detection receivers by using the polar return-to-zero (RZ) four-level pulse amplitude modulation (4-PAM) format. In order to compensate for the limited modulation bandwidth of the RSOA, an optical delay interferometer is used together with an electrical equalizer at the receiver. We successfully transmit the 20-Gb/s polar RZ 4-PAM signal over the 20-km long loopback link without using optical dispersion compensator. We also show that the proposed polar RZ 4-PAM format provides superior performances to the conventional RZ 4-PAM format due to the up-down symmetry of its waveform.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2015-05
Language
English
Article Type
Article
Keywords

WDM PON; 10-GB/S OPERATION

Citation

IEEE PHOTONICS TECHNOLOGY LETTERS, v.27, no.10, pp.1116 - 1119

ISSN
1041-1135
DOI
10.1109/LPT.2015.2408376
URI
http://hdl.handle.net/10203/198758
Appears in Collection
EE-Journal Papers(저널논문)
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