Mode-evolution-based TE mode magneto-optical isolator using asymmetric adiabatic tapered waveguides

Chapter 5: Polarization-Independent Magneto-Optical Isolator Using TM-Mode Nonreciprocal Phase Shift

Higher Order Mode Analysis of Tapered Disc-loaded Waveguides Using the Mode Matching Technique

Several designs for linear colliders for e+e-collisions in the TeV range are currently under discussion. Most of them will use multi bunch operation. Therefore the study of higher order modes excited by previous bunches in the train becomes even more important for the optimal design of the accelerator components. Many of the designs use long tapered disc-loaded waveguides for acceleration. Nume...

Exceptional points and asymmetric mode conversion in quasi-guided dual-mode optical waveguides

Non-Hermitian systems host unconventional physical effects that be used to design new optical devices. We study a non-Hermitian system consisting of 1D planar optical waveguides with suitable amount of simultaneous gain and loss. The parameter space contains an exceptional point, which can be accessed by varying the transverse gain and loss profile. When light propagates through the waveguide s...

On-chip optical mode exchange using tapered directional coupler

We present an on-chip optical mode exchange between two multiplexed modes by using tapered directional couplers on silicon-on-insulator platform. The device consisting of mode multiplexing and mode exchange is compact with relatively large fabrication error tolerance. The simulation results show efficient higher order mode excitation and mode exchange. A low excess loss less than 0.5 dB and hig...

Dielectric multilayer waveguides for TE and TM mode matching

Abstract. We analyse theoretically for the first time to our knowledge the perfect phase matching of guided TE and TM modes with a multilayer waveguide composed of linear isotropic dielectric materials. Alongside strict investigation into dispersion relations for multilayer systems, we give an explicit qualitative explanation for the phenomenon of mode matching on the basis of the standard one-...