Si Photonic Wire Waveguide Devices

Abstract—Si photonic wire waveguides are attractive for constructing various optical devices that are extremely small because the waveguides can be bent with extremely small curvatures of less than a few micrometers of bending radius. We have fabricated optical directional couplers with the waveguides and demonstrated their fundamental characteristics. Their coupling length was extremely short, several micrometers, because of strong optical coupling between the waveguide cores. We have also demonstrated wavelength-demultiplexing functions for these devices with a long coupled waveguide. Optical outputs from a device with a 100-µm-long coupled waveguide changed reciprocally with a 20-nm wavelength spacing between the parallel and cross ports. We also demonstrated the operation of ultrasmall optical adddrop multiplexers (OADMs) with Bragg grating reflectors made up of the waveguides. The dropping wavelength bandwidth of the OADMs was less than 0.7 nm, and these dropping wavelengths c...

• Type: Journal
• Year: 2007
• Where: IEICET
• Authors: Hirohito Yamada, Tao Chu, Satomi Ishida, Yasuhiko Arakawa
• Keywords: IEICET 2007, Optical, Photonic Wire Waveguide, Waveguide