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Linewidth-tolerant QPSK homodyne transmission using a polarization-multiplexed pilot carrier

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1 Author(s)
Miyazaki, T. ; Nat. Inst. of Inf. & Commun. Technol., Tokyo, Japan

Quadrature phase-shift keying homodyne transmission has been demonstrated using a polarization-multiplexed pilot carrier generated in a transmitter and a LiNbO3-based hybrid module in a receiver for self-homodyne detection at 20 Gb/s. No degradation in receiver sensitivity was observed up to a linewidth of 30 MHz. Furthermore, we obtained error-free operation with a bit-error rate of less than 10-11. The proposed scheme can provide stable real-time multilevel modulation/demodulation formats, free from linewidth requirements, to enhance spectral efficiency.

Published in:

Photonics Technology Letters, IEEE  (Volume:18 ,  Issue: 2 )