fast speed electro-optic polymer variable optical attenuator (VOA) is fabricated by utilizing cascaded attenuated-total-reflection technique. The proposed VOA demonstrates high dynamic range and low driving voltage. An ~200 ns response time of the device is obtained, and other measured parameters include a dynamic range up to 24.1 dB, a driving voltage of 39.6 V, and an insertion loss of 1.02 dB.

prism-optical waveguide coupling system, which consists of a prism and a symmetrical metal-cladding polymer optical waveguide, is used to analyze the field-induced intensity variation due to the quadratic electro-optic (QEO) effect. As a result, not only the dc Kerr coefficient, but also the whole components of the QEO tensor of the polymer film are determined experimentally.

The second-order nonlinearity of poled-polymer during photobleaching process is monitored with second harmonic generation(SHG) intensity enhanced by surface plasmon resonance(SPR) in an attenuated total reflection (ATR) configuration. The nonlinear coefficient d33 of the poled polymer is determined by comparing the SPR enhanced second harmonic generation(SHG) intensities with that from the calibrated quartz. Experimental results show that photobleaching process has less effect on the second-order nonlinearity of a poled cross-linked polymer than that of a poled side-chain polymer.