Apodized surface-corrugated gratings with varying duty cycles

We present the first realization of a Bragg grating apodization based on a concatenation of different duty cycles. The gratings were fabricated in SiON planar waveguides. The reflected signal exhibits a sidelobe suppression better than -20 dB outside a bandwidth of 1.36 nm. At the same time the refl...

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Bibliographic Details
Published inIEEE photonics technology letters Vol. 12; no. 6; pp. 639 - 641
Main Authors Wiesmann, D., David, C., Germann, R., Emi, D., Bona, G.L.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.06.2000
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Apodization
Bandwidth
Bragg gratings
Corrugated surfaces
Electromagnetic waveguides
Etching
Filters
Laboratories
Noise levels
Photonics
Planar waveguides
Reflection
Semiconductor waveguides
Sidelobes
Silicon oxynitride
Wide area networks
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Summary:We present the first realization of a Bragg grating apodization based on a concatenation of different duty cycles. The gratings were fabricated in SiON planar waveguides. The reflected signal exhibits a sidelobe suppression better than -20 dB outside a bandwidth of 1.36 nm. At the same time the reflection is stronger than 99.9%, i.e., the resonant light is suppressed better than -30 dB in transmission over 0.22 nm. The gratings are perfectly suited to serve as the wavelength-selective element of a Mach-Zehnder add/drop filter.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:1041-1135
1941-0174
DOI:10.1109/68.849069