Transmission of 28-Gb/s Duobinary and PAM-4 Signals Using DML for Optical Access Network

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We explore the possibility of utilizing 1.55-mu m directly modulated lasers (DMLs) for optical access networks operating at 28 Gb/s per wavelength. For this purpose, we attempt to maximize the power budgets of 28-Gb/s duobinary and four-level pulse amplitude modulation (PAM-4) signals generated from a DML without using optical amplifiers or optical dispersion compensation modules. For experimental investigation, we set the bias current of the DML far above the threshold current, optimize the extinction ratio of the signals, and utilize the electrical equalization at the receiver. The experimental results show that we can secure power margins of 9.6 and 10 dB after transmission over 40-km long standard single-mode fiber for the duobinary and PAM-4 signals, respectively.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2017-01
Language
English
Article Type
Article
Keywords

DIRECTLY MODULATED LASER; OOK

Citation

IEEE PHOTONICS TECHNOLOGY LETTERS, v.29, no.1, pp.130 - 133

ISSN
1041-1135
DOI
10.1109/LPT.2016.2629623
URI
http://hdl.handle.net/10203/220900
Appears in Collection
EE-Journal Papers(저널논문)
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