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Chirp control of an optical signal using phase modulation in a semiconductor optical amplifier

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4 Author(s)
Watanabe, T. ; NTT Opt. Networks Syst. Labs., Kanagawa, Japan ; Sakaida, N. ; Yasaka, H. ; Koga, M.

We demonstrate that phase modulation in a semiconductor optical amplifier converts a positively chirped signal launched from an electroabsorption modulator into negative chirp. This negative chirp reduces the broadening of optical signal waveform due to the anomalous dispersion in standard single-mode fiber (SMF). A 2.5-Gb/s transmission experiment across 600-km SMF confirms that the chirp control technique is effective for extending the signal transport distance.

Published in:

Photonics Technology Letters, IEEE  (Volume:10 ,  Issue: 7 )