Suppression of intermodulation distortion in CATV system using Dual Parallel Mach-Zehnder Modulator | ||
| The International Conference on Electrical Engineering | ||
| Article 7, Volume 7, 7th International Conference on Electrical Engineering ICEENG 2010, May 2010, Pages 1-8 PDF (347.72 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/iceeng.2010.32837 | ||
| Author | ||
| M. Shahidul Islam | ||
| Institute of Information and Communication Technology, Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh. | ||
| Abstract | ||
| Mach-Zehnder (MZ) modulator used in CATV system always produces some intermodulation distortion (IMD) that limits the optical transmission performance significantly. In this paper an analytical model of dual parallel Mach-Zehnder (DPMZ) modulator is proposed to ensure composite second order (CSO) products cancellation and composite third order (CTB) products minimization. We have determined the optimal input optical power splitting ratio with given values of electrode length ratio for a DPMZ modulator. It is found that the effect of CTB is in the allowable range if the input power splitting ratio and electrode length ratio of the primary and secondary MZ modulators are 0.88 and 2.0 respectively. | ||
| Keywords | ||
| Composite second order; composite triple order; analog communication; intermodulation distortion and dual parallel Mach-Zehnder modulator | ||
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