2012 Fiscal Year Final Research Report
Study on Ultra-long Large-capacity Coherent Optical TransmissionSystems Aiming at Realization of the Shannon Limit
| Project/Area Number |
22246046
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Electron device/Electronic equipment
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KIKUCHI Kazuro 東京大学, 大学院・工学系研究科, 教授 (50134458)
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| Co-Investigator(Renkei-kenkyūsha) |
KATOH Kazuhiro 東京大学, 大学院・情報理工学系研究科, 助教 (00292897)
IGARASHI Koji 東京大学, 大学院・工学系研究科, 講師 (80436534)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 情報通信工学 / フォトニックネットワーク |
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| Research Abstract |
The Nyquist wavelength-division multiplexing (WDM) technique can increase the spectral efficiency up to 1 sybmol/s/Hz, generating rectangular-shaped optical spectra whose bandwidths are equal to the symbol rate and aligning them in the optical frequency domain without any frequency gap. In this project, we study generation, transmission, and demodulation of polarization-division multiplexed (PDM) high-order QAM optical signals under the Nyquist-WDM condition. We successfully establish the method for generating 4QAM, 16QAM, and 64QAM Nyquist-WDM PDM signals at 10 Gsymbol/sand demodulating these signals after transmission.
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