High contrast grating for spatial mode filtering and mode control of VCSELs

摘要

High contrast gratings (HCG) have various unique features such as broadband high reflections, high-Q resonance, spatial control of optical phase and so on. We focus on the angular dependence of HCG, which can be managed by designing grating parameters. The angular dependence of HCG is much larger than that of conventional quarter-wavelength stack mirrors while keeping their broadband high reflections. The engineered angular dependence can be useful for spatial mode MUX/DEMUX devices. A possibility of spatial mode demultiplexer based on HCG hollow waveguides is suggested for use in optical interconnects with spatial mode multiplexing. Also, we discuss the transverse mode control of HCG-loaded VCSELs.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.