ALONSO-RAMOS , Carlos

Waveguide Bragg grating filters with narrow bandwidths and high optical rejections are key functions for several advanced silicon photonics circuits. Here, we propose and demonstrate a new, to the best of our knowledge, Bragg grat- ing geometry that provides a narrowband and high rejection response. It combines the advantages of subwavelength...

On-chip pump rejection filters are key building blocks in a variety of applications exploiting nonlinear phenomena, including Raman spectroscopy and photon-pair generation. Ultrahigh rejection has been achieved in the silicon technology by non-coherent cascading of modal-engineered Bragg filters. However, this concept cannot be directly applied...

Applications such as Raman spectroscopy and quantum communications are becoming more prevalent on chip, which is increasing the demand for ultra-high rejection integrated filters. In this study, we present a new type of silicon nitride (SiN) Bragg filter with an asymmetric sinusoidal geometry that uses a non-coherent cascading multimodal...

International audience

International audience

The high index contrast of the silicon-on-insulator (SOI) platform allows the realization of ultra-compact photonic circuits. However, this high contrast hinders the implementation of narrow-band Bragg filters. These typically require corrugations widths of a few nanometers or double-etch ge-ometries, hampering device fabrication. Here we...