| Budget Amount *help |
¥48,230,000 (Direct Cost: ¥37,100,000、Indirect Cost: ¥11,130,000)
Fiscal Year 2012: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
Fiscal Year 2011: ¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2010: ¥20,930,000 (Direct Cost: ¥16,100,000、Indirect Cost: ¥4,830,000)
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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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