Web4 rows · Abstract. The forked grating coupler (FGC) is an optical vortex interface for silicon ... WebUsing this method, a fully etched apodized grating coupler is designed and demonstrated on the SOI platform using PhCs to engineer the refractive index of each scattering slot. An ultralow coupling loss of −1.74 dB (67% coupling efficiency) with a 3 dB bandwidth of 60 nm is demon- strated.
High-efficiency grating-couplers: demonstration of a new design
WebDec 10, 2024 · Here, we present a design approach for focusing TM grating couplers that minimizes these unwanted reflections by introducing a modified slot that fulfills an anti … WebStep 2: Optimization of the linearly apodized grating using 2D FDTD The second step is to optimize the grating using a limited set of parameters. We use the apodized grating defined in step 1 as a starting point. The number of … thomas alpaugh honeoye new york
Out-of-Plane Focusing Grating Couplers for Silicon Photonics ...
WebA phase mask with a variable diffraction efficiency has been used for the fabrication of apodized gratings [12 ]. There are two methods of fabricating such a mask. The diffraction efficiency into the +1 and –1 orders is maximized for a 1:1 mark–space ratio of the grating and the zero order minimized for a specific groove depth (see Chapter 3 ). WebNov 1, 2014 · Grating couplers are key elements enabling the coupling of light between planar waveguide circuits and optical fibers. In this work, it is demonstrated using simulations and experiments that a high coupling efficiency can be achieved for an arbitrary buried oxide thickness by judicious adjustment of the grating radiation angle. WebWe present a theoretical optimisation of 1D apodized grating couplers in a “pure” Silicon-On-Insulator (SOI) architecture, i.e. without any bottom reflector element, by means of a general mutative method. We perform a comprehensive 2D Finite Difference Time Domain study of chirped and apodized grating couplers in 220 nm SOI, and demonstrate that … thomas allom prints