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Recent advances in electrooptic polymer modulators incorporating highly nonlinear chromophore

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11 Author(s)
Min-Cheol Oh ; Pacific Wave Industries, Los Angeles, CA, USA ; Zhang, Hua ; Zhang, Cheng ; Erlig, Hernan
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Based on a nonlinear optical polymer with a highly nonlinear chromophore (CLD) dispersed in an amorphous polycarbonate (APC), we have developed electrooptic (EO) polymer modulators operating at 1550-nm wavelength with low loss and good thermal stability. By incorporating polymer insulation layer, push-pull poling was successfully performed without film damages. We also demonstrated that the propagation loss of the EO polymer waveguide could be reduced as low as 1.2 dB/cm at 1550 nm when the large core waveguide structure was incorporated. The long-term reliabilities of the EO polymer modulator made of CLD/APC polymer were investigated. When the modulator was hermetically sealed in an inert gas, the Vπ change of a Mach-Zehnder modulator was negligible over 30 d of operation with 20-mW exposure to the waveguide input. In the thermal stability measurement, 25% Vπ increase was observed from the sample heated to 60°C over 40 d, though the sample left at room temperature showed no decay of nonlinearity

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Selected Topics in Quantum Electronics, IEEE Journal of  (Volume:7 ,  Issue: 5 )