Multimode Interference Structures of Variable Geometry for Optical Sensor Application

All-fiber multimode interference micro-displacement sensor

We report an all-fiber micro-displacement sensor based on multimode interference (MMI) effects. The micro-displacement sensor consists of a segment of No-Core multimode fiber (MMF) with one end spliced to a segment of single mode fiber (SMF) which acts as the input. The other end of the MMF and another SMF are inserted into a capillary ferrule filled with index matching liquid. Since the refrac...

Multimode Passive Optical Network for LAN Application

Arbitrary Power Splitting Couplers Based on 3x3 Multimode Interference Structures for All-optical Computing

-Chip level optical links based on VLSI photonic integrated circuits have been proposed to replace metal electrical data paths in cases where high frequencies make electrical traces impractical. This is especially relevant to highspeed clock signals as silicon CMOS circuit technology is scaled higher in speed to the GHz range and beyond. In this paper, the realization of optical couplers and po...

Optical Wavelength and Dimensions Tolerance Criterion for Multimode Interference Couplers

The self-imaging property of a homogeneous multi-moded planar optical waveguide has been applied in the design optical couplers based on multimode Interference (MMI). Based on this design, the optical wavelength and dimensions tolerance for MMI-3dB couplers are investigated analytically. They are shown to be inversely proportional to the multimode section width. Among Symmetrical, paired, and g...

Optical Polarization Filters and Splitters Based on Multimode Interference Structures using Silicon Waveguides

In this paper, we would like to propose a novel design for realizing optical polarization filters and combiners based on multimode interference (MMI) structures using silicon waveguides. The device geometry is simple and eases of fabrication. In addition, analytical and numerical methods are used to optimize the designs for these devices in order to reduce losses and device size.