Complex spectral filters in silicon waveguides based on cladding-modulated Bragg gratings

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985882%3A_____%2F21%3A00543294" target="_blank" >RIV/67985882:_____/21:00543294 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1364/OE.420696" target="_blank" >https://doi.org/10.1364/OE.420696</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1364/OE.420696" target="_blank" >10.1364/OE.420696</a>

Result language

angličtina

Original language name

Complex spectral filters in silicon waveguides based on cladding-modulated Bragg gratings

Original language description

Spectral filters are important building blocks for many applications in integrated photonics, including datacom and telecom, optical signal processing and astrophotonics. Sidewall-corrugated waveguide grating is typically the preferred option to implement spectral filters in integrated photonic devices. However, in the high-index contrast silicon-on-insulator (SOI) platform, designs with corrugation sizes of only a few tens of nanometers are often required, which hinders their fabrication. In this work, we propose a novel geometry to design complex Bragg filters with an arbitrary spectral response in silicon waveguides with laterally coupled Bragg loading segments. The waveguide core is designed to operate with a delocalized mode field, which helps reduce sensitivity to fabrication errors and increase accuracy on synthesized coupling coefficients and the corresponding spectral shape control. We present an efficient design strategy, based on the layer-peeling and layer-adding algorithms, that allows to readily synthesize an arbitrary target spectrum for our cladding-modulated Bragg gratings. The proposed filter concept and design methodology are validated by designing and experimentally demonstrating a complex spectral filter in an SOI platform, with 20 non-uniformly spaced spectral notches with a 3-dB linewidth as small as 210 pm

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

<a href="/en/project/GA19-00062S" target="_blank" >GA19-00062S: Advanced functionalities in subwavelength photonic and plasmonic structures</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Optics Express

ISSN

1094-4087

e-ISSN

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Volume of the periodical

29

Issue of the periodical within the volume

11

Country of publishing house

US - UNITED STATES

Number of pages

14

Pages from-to

15867-15881

UT code for WoS article

000654369300001

EID of the result in the Scopus database

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