https://scholars.lib.ntu.edu.tw/handle/123456789/607068
標題: | Photonic Crystal Structured Multi-Mode VCSELs Enabling 92-Gbit/s QAM-OFDM Transmission | 作者: | Lin Y.-H Tsai C.-T Wu W.-L Cheng C.-H Choquette K GONG-RU LIN |
關鍵字: | Bit-loading;data center;OFDM;photonic crystal;vertical-cavity surface-emitting laser (VCSEL);Bandwidth;Data streams;Orthogonal frequency division multiplexing;Photonic crystal fibers;Photonic crystals;Surface emitting lasers;Transceivers;Transmissions;Differential quantum efficiency;Modulation bandwidth;Multi-mode fibers (MMF);OFDM transmission;Relative intensity noise;Single mode lasing;Threshold currents;Waveform synthesis;Quadrature amplitude modulation | 公開日期: | 2021 | 卷: | 39 | 期: | 13 | 起(迄)頁: | 4331-4340 | 來源出版物: | Journal of Lightwave Technology | 摘要: | The multi-mode vertical-cavity surface-emitting lasers (MM-VCSELs) with different photonic crystal (PhC) designs in core and cladding regions are compared for transmitting the complex formatted QAM-OFDM data over 100-m OM5 multi-mode fiber (MMF). Among the designs with using flat core/cladding (denoting as Coreflat/Cladflat) and/or PhC core/cladding (denoting as Corephc/Cladphc) for the MM-VCSEL, the Coreflat+Cladflat VCSEL with the highest threshold current and large emission aperture provides the highest differential quantum efficiency of 0.11 and output power of 2 mW, whereas the Coreflat+Cladphc2 VCSEL with two periods of cladding PhC reveals the lowest threshold current of 2 mA, the highest modulation bandwidth of 15 GHz, the lowest relative intensity noise peak of -126 dBc/Hz and background level of -143 dBc/Hz. After pre-compensation, the Coreflat+Cladphc2 VCSEL chip can achieve the highest OFDM bandwidth of 18 GHz for 72-Gbit/s transmission in the BtB case. With additionally adding 1 period of core PhC, the Corephc1+Cladphc2 VCSEL possesses a single-mode lasing spectrum to facilitate the suppression of modal dispersion after MMF propagation. Hence, the Corephc1+Cladphc2 VCSEL exhibits the same bit rate of 60 Gbit/s as compared to the Coreflat+Cladphc2 VCSEL after 100-m OM5-MMF. After improving the analog bandwidth for waveform synthesis, the data rate of Coreflat+Cladphc2 VCSEL can successfully deliver 76-Gbit/s and 72-Gbit/s single-band 16-QAM OFDM data streams for BtB and 100-m OM5 MMF conditions via the pre-leveling technology. To date, the ultimate raw data rate achieves 92-Gbit/s with employing the multi-band QAM-OFDM data format. ? 1983-2012 IEEE. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85104658677&doi=10.1109%2fJLT.2021.3073898&partnerID=40&md5=b4774d453f3de5aeee7b5d89d9fb7d33 https://scholars.lib.ntu.edu.tw/handle/123456789/607068 |
ISSN: | 07338724 | DOI: | 10.1109/JLT.2021.3073898 |
顯示於: | 電機工程學系 |
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