Transmission Performance of OOK and 4-PAM Signals Using Directly Modulated 1.5-μm VCSEL for Optical Access Network

Transmission Performance of OOK and 4-PAM Signals Using Directly Modulated 1.5-μm VCSEL for Optical Access Network. Jingjing Zhou, Changyuan Yu, & Hoon Kim Journal of Lightwave Technology, 33(15):3243–3249, August, 2015.

Paper abstract bibtex

We evaluate the possibility of realizing optical access networks using 1.5-μm vertical-cavity surface-emitting lasers (VCSELs) in the on-off keying (OOK) and four-level pulse amplitude modulation (4-PAM) formats. In order to maximize the power budget of the networks, we optimize the extinction ratio of the 10.7- and 21.4-Gb/s signals and exploit the electrical equalization at the receiver. The experimental comparison made at 10.7 Gb/s shows that the OOK format vastly outperforms the 4-PAM format in terms of tolerance to chromatic dispersion. For example, we achieve the 80-km transmission of the OOK signal over standard single-mode fiber (SSMF), but the maximum reach is halved when the 4-PAM signal is employed. Nevertheless, the 4-PAM format is still an effective way to double the data rate of the VCSEL links in optical access networks. We successfully transmit the 21.4-Gb/s 4-PAM signal generated by using the 1.5-μm VCSEL over 18-km long SSMF.

@article{jingjing_zhou_transmission_2015,
	title = {Transmission {Performance} of {OOK} and 4-{PAM} {Signals} {Using} {Directly} {Modulated} 1.5-μm {VCSEL} for {Optical} {Access} {Network}},
	volume = {33},
	copyright = {\&\#169; 2015 IEEE},
	url = {https://www.osapublishing.org/jlt/abstract.cfm?uri=jlt-33-15-3243},
	abstract = {We evaluate the possibility of realizing optical access networks using 1.5-μm vertical-cavity surface-emitting lasers (VCSELs) in the on-off keying (OOK) and four-level pulse amplitude modulation (4-PAM) formats. In order to maximize the power budget of the networks, we optimize the extinction ratio of the 10.7- and 21.4-Gb/s signals and exploit the electrical equalization at the receiver. The experimental comparison made at 10.7 Gb/s shows that the OOK format vastly outperforms the 4-PAM format in terms of tolerance to chromatic dispersion. For example, we achieve the 80-km transmission of the OOK signal over standard single-mode fiber (SSMF), but the maximum reach is halved when the 4-PAM signal is employed. Nevertheless, the 4-PAM format is still an effective way to double the data rate of the VCSEL links in optical access networks. We successfully transmit the 21.4-Gb/s 4-PAM signal generated by using the 1.5-μm VCSEL over 18-km long SSMF.},
	language = {EN},
	number = {15},
	urldate = {2018-10-26TZ},
	journal = {Journal of Lightwave Technology},
	author = {{Jingjing Zhou} and {Changyuan Yu} and {Hoon Kim}},
	month = aug,
	year = {2015},
	keywords = {Dispersion, Modulation, Optical access networks, Vertical cavity surface emitting lasers},
	pages = {3243--3249}
}

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