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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 24, Iss. 6 — Jun. 1, 2007
  • pp: 1283–1290

Higher-order mode grating devices in As 2 S 3 chalcogenide glass rib waveguides

Klaus Finsterbusch, Neil J. Baker, Vahid G. Ta’eed, Benjamin J. Eggleton, Duk-Yong Choi, Steve Madden, and Barry Luther-Davies  »View Author Affiliations


JOSA B, Vol. 24, Issue 6, pp. 1283-1290 (2007)
http://dx.doi.org/10.1364/JOSAB.24.001283


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Abstract

We report on the design and fabrication of high-quality long-period gratings in chalcogenide glass ( As 2 S 3 ) rib waveguides utilizing the strong photosensitivity. Higher-order modes of the rib waveguides are analyzed by inspection of the spectra of Bragg gratings written into these waveguides. Based on these measurements, we infer the effective indices of higher-order modes, which are in good agreement with modeling results using a beam propagation method. High-quality long-period gratings are then designed and written into the rib waveguides using a simple shadow mask technique. Coupling the fundamental to the HE 02 mode strong resonances of up to 20 dB depths are obtained. The gratings have a length of L = 26 mm and a period of Λ = 86 μ m . In situ monitoring of the writing process allows the growth dynamics of the grating to be studied. A theoretical fit to the measured transmission curve gives an average index change of 10 3 .

© 2007 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(160.3130) Materials : Integrated optics materials
(350.2770) Other areas of optics : Gratings

ToC Category:
Materials

History
Original Manuscript: November 8, 2006
Revised Manuscript: January 31, 2007
Manuscript Accepted: February 13, 2007
Published: May 17, 2007

Citation
Klaus Finsterbusch, Neil J. Baker, Vahid G. Ta'eed, Benjamin J. Eggleton, Duk-Yong Choi, Steve Madden, and Barry Luther-Davies, "Higher-order mode grating devices in As2S3 chalcogenide glass rib waveguides," J. Opt. Soc. Am. B 24, 1283-1290 (2007)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-24-6-1283

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