Affiliation:
1. Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, Koszykowa 75, 00-662 Warszawa, Poland
Abstract
This study presents a comprehensive numerical investigation of silicon Bragg grating (BG) waveguide structures with cladding modulation. The device design features a uniform silicon ridge waveguide with corrugated cladding on both sides. Two distinct architectures are explored: one where silicon serves as the cladding and another where gold (Au) is employed. Our detailed analysis uncovers compelling results for both configurations. The silicon corrugated cladding BG waveguide demonstrates a bandstop bandwidth of ~50 nm, accompanied by an extinction ratio (ER) of 7.98 dB. The device footprint is compact, measuring approximately 16.4 × 3 µm2. In contrast, the Au corrugated cladding BG waveguide exhibits exceptional performance, boasting a wideband bandstop bandwidth of ~143 nm and an impressive ER of 19.96 dB. Despite this enhanced functionality, the device maintains a reasonably small footprint at around 16.9 × 3 µm2. This investigation underscores the potential of Au corrugated cladding BG waveguides as ideal candidates for achieving high-spectral-characteristic bandstop filters. The significant improvement in bandstop bandwidth and ER makes them promising for advanced optical filtering applications.
Subject
Radiology, Nuclear Medicine and imaging,Instrumentation,Atomic and Molecular Physics, and Optics
Reference30 articles.
1. Optical signal processing based on silicon photonics waveguide Bragg gratings: Review;Kaushal;Front. Optoelectron.,2018
2. Integrated waveguide Bragg gratings for microwave photonics signal processing;Burla;Opt. Express,2013
3. Fabricating waveguide Bragg gratings (WBGs) in bulk materials using ultrashort laser pulses;Ams;Nanophotonics,2017
4. (2023, November 23). Dual Phase-Shift Bragg Grating Silicon Photonic Modulator Operating up to 60 Gb/s. Available online: https://opg.optica.org/oe/fulltext.cfm?uri=oe-24-3-2413&id=335910.
5. Shi, W., Veerasubramanian, V., Plant, D.V., Jaeger, N.A.F., and Chrostowski, L. (2014). Next-Generation Optical Networks for Data Centers and Short-Reach Links, SPIE.