Straight and curved distributed Bragg reflector design for compact WDM filters

Yonas Gebregiorgis; Sujith Chandran; Marios Papadovasilakis; Yusheng Bian; Michal Rakowski; Abdelsalam Aboketaf; Rod Augur; Jaime Viegas

doi:10.1364/OE.485609

Straight and curved distributed Bragg reflector design for compact WDM filters

Yonas Gebregiorgis, Sujith Chandran, Marios Papadovasilakis, Yusheng Bian, Michal Rakowski, Abdelsalam Aboketaf, Rod Augur, Jaime Viegas

IBM Microelectronics Division

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Grating-assisted contra-directional couplers (CDCs) wavelength selective filters for wavelength division multiplexing (WDM) are designed and experimentally demonstrated. Two configuration setups are designed; a straight-distributed Bragg reflector (SDBR) and curved distributed Bragg reflector (CDBR). The devices are fabricated on a monolithic silicon photonics platformin a GlobalFoundries CMOS foundry. The sidelobe strength of the transmission spectrum is suppressed by controlling the energy exchange between the asymmetric waveguides of the CDC using grating and spacing apodization. The experimental characterization demonstrates a flat-top and low insertion loss (0.43 dB) spectrally stable performance (<0.7 nm spectral shift) across several different wafers. The devices have a compact footprint of only 130μm2/Ch (SDBR) and 3700μm2/Ch (CDBR).

Original language	British English
Pages (from-to)	11519-11535
Number of pages	17
Journal	Optics Express
Volume	31
Issue number	7
DOIs	https://doi.org/10.1364/OE.485609
State	Published - 27 Mar 2023

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abstract = "Grating-assisted contra-directional couplers (CDCs) wavelength selective filters for wavelength division multiplexing (WDM) are designed and experimentally demonstrated. Two configuration setups are designed; a straight-distributed Bragg reflector (SDBR) and curved distributed Bragg reflector (CDBR). The devices are fabricated on a monolithic silicon photonics platformin a GlobalFoundries CMOS foundry. The sidelobe strength of the transmission spectrum is suppressed by controlling the energy exchange between the asymmetric waveguides of the CDC using grating and spacing apodization. The experimental characterization demonstrates a flat-top and low insertion loss (0.43 dB) spectrally stable performance (<0.7 nm spectral shift) across several different wafers. The devices have a compact footprint of only 130μm2/Ch (SDBR) and 3700μm2/Ch (CDBR).",

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AU - Gebregiorgis, Yonas

AU - Chandran, Sujith

AU - Papadovasilakis, Marios

AU - Bian, Yusheng

AU - Rakowski, Michal

AU - Aboketaf, Abdelsalam

AU - Augur, Rod

AU - Viegas, Jaime

PY - 2023/3/27

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AB - Grating-assisted contra-directional couplers (CDCs) wavelength selective filters for wavelength division multiplexing (WDM) are designed and experimentally demonstrated. Two configuration setups are designed; a straight-distributed Bragg reflector (SDBR) and curved distributed Bragg reflector (CDBR). The devices are fabricated on a monolithic silicon photonics platformin a GlobalFoundries CMOS foundry. The sidelobe strength of the transmission spectrum is suppressed by controlling the energy exchange between the asymmetric waveguides of the CDC using grating and spacing apodization. The experimental characterization demonstrates a flat-top and low insertion loss (0.43 dB) spectrally stable performance (<0.7 nm spectral shift) across several different wafers. The devices have a compact footprint of only 130μm2/Ch (SDBR) and 3700μm2/Ch (CDBR).

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Straight and curved distributed Bragg reflector design for compact WDM filters

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