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16-level quadrature amplitude modulation by monolithic quad-parallel mach-zehnder optical modulator

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6 Author(s)
Chiba, A. ; Nat. Inst. of Inf. & Commun. Technol., Koganei, Japan ; Sakamoto, T. ; Kawanishi, T. ; Higuma, K.
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A monolithically-integrated quad-parallel Mach-Zehnder optical modulator has been fabricated. 3 and 6 dB electro-optical bandwidths of Mach-Zehnder structures embedded in the modulator were evaluated as 22 and 36 GHz, respectively. By using the monolithic optical modulator, a 10 Gbaud 16-level quadrature amplitude modulation (QAM) signal was successfully obtained.

Published in:

Electronics Letters  (Volume:46 ,  Issue: 3 )