Polarization-independent and wavelength-insensitive digital optical switch with electro-optic polymer rib waveguides

전기광학 폴리머 립 광도파로를 이용한 편광과 파장에 무관하게 동작하는 디지탈 광스위치

An electro-optic polymer digital optical switch with rib waveguides is designed and fabricated by using the RIE method. POlarization-independent and wavelength-insensitive operation is demonstrated at the wavelengths of 1.3mm and 1.55mm, for the first time in electro-optic polymer-based devices. The rib waveguides have been designed to achieve good guiding properites for both TE and TM polarizations by controlling the etching depth as well as its aspect ratio. Especially theetching depth is controlled to change the guided mode profiles of the rib waveguide and thus to achieve an optimum coupling in the branch. The measured crosstalk is better than -16dB and the extincton ratio of each output port is greater than 16dB.