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the setup as shown in Figure 6. Low frequency modulation with a sine AC voltage of 1 kHz and the DC bias voltages are added to measure the V . Light with TM polarization is coupled into the waveguide through a single mode fiber. The output light is coupled by another single mode fiber and received by a Ge detector. The detected optical response is simultaneously observed by an oscilloscope as illustrated in Figure 7. The measured V of the modulator is about 8.5 V with a 1.5-cm-long CPW electrode in a 3.5-cm-long device. The optical insert loss of for the TM mode is less than 20 dB. CONCLUSIONSIn conclusion, we have designed and successfully demonstrated a CPW MZ modulator using a strip-loaded waveguide structure based on the hybrid EO material with low cost and good poling stability. We obtain the propagating loss and insert loss of the waveguide at about 2.58 dB/cm and less than 20 dB at 1550 nm, respectively. The CPW modulator is successfully fabricated and the V 's of 8.5 V is obtained. Considering the thermal stabilities of the hybrid film are excellent and the simple processes for the device fabrication, this type of device has great potential for electro-optic devices applications. ACKNOWLEDGMENTS

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