Compact and low-loss bent hollow waveguides with distributed Bragg reflector

Hua Kung Chiu, Fu Li Hsiao, Chia Hua Chan, Chii Chang Chen

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


In this study, a hollow bent waveguide with distributed Bragg reflectors (DBR) in silicon substrate was presented theoretically and experimentally. We used the two-dimensional finite-difference time-domain method to simulate bending transmission efficiencies for arc- and cut-type 90°-bent waveguides. The air core was embedded by Si3N4/SiO2 multilayer. The multilayer stacks were deposited by using plasma-enhanced chemical vapor deposition on the top and bottom of air core. The lowest 90 degree bending loss is around 3.9dB for the arc-type bending waveguides and 0.8dB for cut-type bending waveguides, respectively. This waveguide demonstrates a possibility for higher density of integration in planar light wave circuits.

Original languageEnglish
Pages (from-to)15069-15073
Number of pages5
JournalOptics Express
Issue number19
Publication statusPublished - 2008 Sep 15

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Fingerprint Dive into the research topics of 'Compact and low-loss bent hollow waveguides with distributed Bragg reflector'. Together they form a unique fingerprint.

Cite this