標題: Modal Linewidth Dependent Transmission Performance of 850-nm VCSELs With Encoding PAM-4 Over 100-m MMF
作者: Kao, Hsuan-Yun
Chi, Yu-Chieh
Peng, Chun-Yen
Leong, Shan-Fong
Chang, Chun-Kai
Wu, Yun-Chen
Shih, Tien-Tsorng
Huang, Jian Jang
Kuo, Hao-Chung
Cheng, Wood-Hi
Wu, Chao-Hsin
Lin, Gong-Ru
光電工程學系
Department of Photonics
關鍵字: Data center;vertical cavity surface emitting laser (VCSEL);4-level pulse amplitude modulation (PAM-4)
公開日期: 1-Oct-2017
摘要: By changing the transverse-mode spectral linewidth of vertical cavity surface emitting lasers (VCSELs) at 850 nm, the directly encoded four-level pulse amplitude modulation data transmission performance over 100-m-long OM4 multimode fiber (MMF) are demonstrated and compared. The multi-mode VCSEL chip with the largest aperture of 11 mu m reveals the widest spectral linewidth and the highest optical power, but provides the smallest modulation bandwidth to support only 44-and 28-Gb/s data rates for back-to-back (BtB) and 100-m OM4 MMF transmission cases, respectively. By shrinking the aperture size to reduce transverse-mode number, the few-mode VCSEL with the strongest throughput power enables a BtB transmission capacity as high as 52 Gb/s. However, its modal dispersion induced after OM4 MMF transmission inevitably degrade the data rate to 32 Gb/s. In contrast, the single-mode VCSEL with the smallest aperture of 3 mu m reveals the highest modulation bandwidth and negligible modal dispersion to show competitive BtB transmission capacity with that of the few-mode VCSEL. In particular, the single-mode VCSEL successfully achieves a data rate of 34 Gb/s with a power penalty as low as 1.4 dB, after 100-m OM4 MMF transmission.
URI: http://dx.doi.org/10.1109/JQE.2017.2750414
http://hdl.handle.net/11536/146135
ISSN: 0018-9197
DOI: 10.1109/JQE.2017.2750414
期刊: IEEE JOURNAL OF QUANTUM ELECTRONICS
Volume: 53
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