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Proceedings Paper

Bias-free Y-branch waveguide modulator based on domain-inversed modulation of electro-optic polymer
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Paper Abstract

A Y-branch directional coupler modulator based on electro-optic (EO) polymer with domain-inversion is designed, fabricated, and characterized. The functional core material is LPD-80 chromophore in amorphour-polycarbonate (APC) host polymer which is cladded between UV15-LV and UFC-170A. The switching voltage of 4.4V and the electro-optic coefficient (r33) of 90pm/V are measured from 4-domain directional coupler modulator and Mach-Zehnder modulator, respectively. A two-tone test of domain-inversed directional coupler modulator demonstrates the spurious-free dynamic range (SFDR) of 119dB/Hz2/3, which is enhanced by 11dB compared with the conventional Mach-Zehnder modulator. The SFDR of Mach-Zehnder modulator shows good agreement with simulation result but the directional coupler modulator shows approximately 10dB lower value than simulation result, which is mainly due to the high sensitivity of directional coupler structure to the fabrication error. Further improvement can be achieved with completion of fabrication precision.

Paper Details

Date Published: 23 February 2010
PDF: 8 pages
Proc. SPIE 7607, Optoelectronic Interconnects and Component Integration IX, 76070X (23 February 2010); doi: 10.1117/12.843832
Show Author Affiliations
Beomsuk Lee, The Univ. of Texas at Austin (United States)
Che-Yun Lin, The Univ. of Texas at Austin (United States)
Alan X. Wang, Omega Optics, Inc. (United States)
Raluca Dinu, GigOptix, Inc. (United States)
Ray T. Chen, The Univ. of Texas at Austin (United States)

Published in SPIE Proceedings Vol. 7607:
Optoelectronic Interconnects and Component Integration IX
Alexei L. Glebov; Ray T. Chen, Editor(s)

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