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Pilot-tone-based WDM monitoring technique for DPSK systems

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5 Author(s)
Jun, S.B. ; Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon ; Hoon Kim ; Park, P.K.J. ; Lee, J.H.
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To evaluate the effectiveness of the pilot-tone-based monitoring technique in differential phase-shift keying (DPSK) systems, we measure the mutual interactions between the pilot tones and DPSK signals and compare the results with those of on-off keying (OOK) signals. The results show that, by using the DPSK format instead of OOK, it is possible to increase the number of wavelength-division-multiplexed channels that can be monitored simultaneously by using pilot tones without using optical demultiplexers by more than one hundred times

Published in:

Photonics Technology Letters, IEEE  (Volume:18 ,  Issue: 20 )