Abstract
This paper proposes a quaternary amplitude- shift-keying (4ASK) modulation circuit that suppresses amplitude distortion of the transmitting 4ASK signal. The performance of the proposed circuit is quantitatively verified through numerical calculation in comparison to a conventional alternative. The feasibility of the proposed circuit as integrated in a lithium niobate substrate is also demonstrated: the suppression of amplitude distortion is successfully demonstrated and minimum sensitivity of the transmitted 4ASK signal is 1.7 dB better than that offered by the conventional circuit.
Original language | English |
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Pages (from-to) | 733-738 |
Number of pages | 6 |
Journal | Journal of Lightwave Technology |
Volume | 22 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2004 Mar 1 |
Externally published | Yes |
Keywords
- Amplitude distortion
- Eye-opening penalty
- Mach-Zehnder modulator (MZM)
- Quaternary amplitude shift keying (4ASK)
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics