Title :
Demonstration of a Linearized Traveling Wave Y-Fed Directional Coupler Modulator Based on Electro-Optic Polymer
Author :
Lee, Beom Suk ; Lin, Che-Yun ; Wang, Alan X. ; Chen, Ray T.
Author_Institution :
Univ. of Texas at Austin, Austin, TX, USA
fDate :
7/1/2011 12:00:00 AM
Abstract :
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/Hz2/3 over the modulation frequency of 2-8 GHz are measured form the fabricated device.
Keywords :
electro-optical devices; microwave photonics; modulators; optical communication equipment; optical directional couplers; optical polymers; electro-optic polymer; frequency 2 GHz to 8 GHz; high speed analog optical link; linearized traveling wave Y-fed directional coupler modulator; third order intermodulation distortion suppression; traveling wave electrode; traveling wave linear modulator; velocity matching; Directional couplers; Distortion measurement; Electrodes; Microstrip; Modulation; Optical waveguides; Radio frequency; $Delta beta$-reversal; Directional coupler; electro-optic polymer; linear modulator; traveling wave electrode;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2011.2150735
