Effects of Electrical and Optical Equalizations in 28-Gb/s RSOA-Based WDM PON

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We experimentally investigate the roles of electrical and optical equalizers in the 28-Gb/s wavelength-division-multiplexed passive optical network implemented by using reflective semiconductor optical amplifiers (RSOAs) and direct-detection receivers. For the generation of 28-Gb/s signal, we directly modulate an RSOA in the polar return-to-zero (RZ) N-ary pulse-amplitude-modulation (PAM) format. The results show that the optical equalization is capable of compensating the waveform distortions caused by both the bandwidth-limitation of RSOA and fiber's chromatic dispersion without deteriorating the signal-to-noise ratio (SNR). On the other hand, the electrical equalization is effective for the compensation of the bandwidth-limitation of RSOA only at the cost of SNR. The results also show that the electrical equalization is helpful to compensate for the remaining waveform distortions after the optical equalization. By using both equalizers, we demonstrate the transmission of the 28-Gb/s signals in polar RZ-PAM-N formats (N = 2, 3, and 4) over 20 km of standard single-mode fiber.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2016-11
Language
English
Article Type
Article
Keywords

DELAY INTERFEROMETER; 10-GB/S OPERATION

Citation

IEEE PHOTONICS TECHNOLOGY LETTERS, v.28, no.22, pp.2537 - 2540

ISSN
1041-1135
DOI
10.1109/LPT.2016.2602883
URI
http://hdl.handle.net/10203/214222
Appears in Collection
EE-Journal Papers(저널논문)
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