Apodized surface-corrugated gratings with varying duty cycles

Author

Wiesmann, D. ; David, C. ; Germann, R. ; Emi, D. ; Bona, G.L.

Author_Institution

Electron. Lab., Swiss Fed. Inst. of Technol., Zurich, Switzerland

Volume

12

Issue

6

fYear

2000

fDate

6/1/2000 12:00:00 AM

Firstpage

639

Lastpage

641

Abstract

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.

Keywords

Bragg gratings; optical communication equipment; optical images; optical planar waveguides; optical waveguide filters; silicon compounds; Bragg grating apodization; Mach-Zehnder add/drop filter; SiON; SiON planar waveguides; apodized surface-corrugated gratings; duty cycle concatenation; reflected signal; resonant light suppression; sidelobe suppression; varying duty cycles; wavelength-selective element; Bandwidth; Bragg gratings; Corrugated surfaces; Electromagnetic waveguides; Etching; Filters; Laboratories; Planar waveguides; Semiconductor waveguides; Wide area networks;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.849069

Filename

849069