ARROW-TYPE POLARIZER UTILIZING FORM BIREFRINGENCE IN MULTILAYER FIRSTCLADDING

We proposed a novel waveguide polarizer using an ARROW structure, of w hich the first cladding consists of three thin layers. Theoretical cal culation shows that this polarizer can achieve a high isolation over 3 0 dB / cm with small insertion loss of 0.01 dB / cm at the wavelength of 1.3 mu m. The isolation of 83 dB / cm with the insertion loss of 4. 3 dB / cm was experimentally obtained at the wavelength of 0.633 mu m. This structure is suitable for the integration of a polarization spli tter and photodetector.