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http://dx.doi.org/10.3807/JOSK.2014.18.4.330

Dynamic Range Improvement of IM-DD Optical Link using Dual-Wavelength Dual-Parallel Modulation  

Li, Xianghua (School of Electronic Science and Engineering, Southeast University)
Yang, Chun (School of Electronic Science and Engineering, Southeast University)
Zhou, Zhenghua (School of Electronic Science and Engineering, Southeast University)
Chong, Yuhua (School of Electronic Science and Engineering, Southeast University)
Publication Information
Journal of the Optical Society of Korea / v.18, no.4, 2014 , pp. 330-334 More about this Journal
Abstract
In this paper, we present an incoherent dual-parallel modulation linearized optical link employing two different optical wavelengths. Comparing with previous dual-parallel modulation, this linearization method prevents the recreation of distortion products and can be readily implemented. Furthermore, a dual-wavelength dual-parallel modulation linearized optical link constructed with the commercially available devices is experimentally demonstrated with a spurious-free dynamic range of $122.5dB.Hz^{4/5}$. More than 25 dB suppression of the intermodulation distortion, 15.6 dB improvement of spurious-free dynamic range and 1.5 dB improvement of compression dynamic range are achieved after linearization.
Keywords
Analog optical link; Linearization method; Intermodulation distortion; Spurious-free dynamic range;
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