In this paper, we demonstrate a traveling wave linear modulator for high speed analog optical link applications. A two-section Y-fed directional coupler modulator based on electro-optic polymer is linearized with Δβ-reversal technique to suppress the third-order intermodulation distortions. A traveling wave electrode with low RF loss and excellent velocity matching is designed and demonstrated with the bandwidth-length product of 125 GHz ·cm. The 3-dB electrical bandwidth of 10 GHz and the spurious free dynamic range of 110 ±3 dB/Hz2/3over the modulation frequency of 2-8 GHz are measured form the fabricated device.
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Lee et al. (2011) studied this question.
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