Measurement of the optical transmission modes and losses of the poled guest-host polymer NAEC/PEK-c planar waveguides

The polyetherketone (PEK-c) guest-host polymer planar waveguides doped with (4'-nitro)-3-azo-9-ethyl-carbazole (NAEC) were prepared. The waveguide fil ms were poled by corona-onset poling at elevated temperature (COPET), and t he corona poling setup includes a grid voltage making the surface-charge di stribution uniform. By using the prism-in coupling method, the dark-line sp ectrum given by the reflected intensity versus the angle of incidence have been obtained, and the optical transmission losses of mth modes have been m easured for the poled polymer waveguides at lambda = 632.8 nm. The measurem ent result showed that the optical loss of the fundamental mode is less tha n 0.7 dB cm(-1) for the TE polarization. (C) 2000 Elsevier Science Ltd. All rights reserved.