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A novel scheme for generating optical dark return-to-zero pulses and its application in a label switching optical network

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6 Author(s)
Jianjun Yu ; NEC Labs America, Princeton, NJ, USA ; Lei Xu ; Yong-Kee Yeo ; Nan Ji, P.
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We experimentally demonstrate a novel and simple method to generate a dark return-to-zero (RZ) pulse with tunable pulsewidth and extinction ratio by using a dual-arm LiNbO 3 intensity modulator. Our experimental results show that this dark RZ pulse signal can be used in a 10-Gb/s optical packet switching system as an optical label. In addition, we demonstrate that this dark RZ label can be easily erased using the gain saturation effect in a semiconductor optical amplifier.

Published in:

Photonics Technology Letters, IEEE  (Volume:18 ,  Issue: 14 )