Abstract—Design, fabrication and characterization of a photodefinable benzocyclobutene (BCB 4022-35 is a product of DowTM) single mode rib optical waveguide is presented in this work. At first, the refractive index of polymer film is measured by the method of prism coupling. We design the single mode rib waveguide based on the geometrical adjustment of rib width, total waveguide height using conventional R-soft BPM and effective index methods. Based on the design results, BCB waveguides were fabricated by using photolithographic process with wet etching, which is quite complicated and time consuming. In this work, the insertion and propagation losses of waveguide are measured by using the conventional cut back method. The insertion losses of waveguide are 3.95 dB and 4.08 dB for TE and TM modes respectively. The propagation losses of waveguide are 1.09dB/cm and 1.20dB/cm for TE and TM modes respectively.

Index Terms—Benzocyclobutene (BCB 4022-35), rib waveguide, single mode

Cite: Fikret. G. Aras, E. Öz Orhan, and O. Salihoglu, "Benzocyclobutene (BCB 4022-35) Single Mode Rib Waveguides," Lecture Notes on Photonics and Optoelectronics , Vol.1, No.1, pp.14-17,  June 2013. doi: 10.12720/lnpo.1.1.14-17