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Numerical analysis of a novel straight polymer channel waveguide based variable optical attenuator

Depending on their chemical structures, polymer materials show large variation of thermo-optical coefficient. Utilizing this property a novel straight polymer channel waveguide based variable optical attenuator (VOA) was proposed. This article presents some numerical analysis results of this type of VOA devices. The results show that the proposed design can offer an attenuation level of more than 30 dB with less than 25 mW electrical power consumption, and achieve less than 0.3 dB polarization dependent loss at the attenuation level of 20 dB.