Small core rib waveguides with embedded gratings in As2Se3 glass | Zendy

N. Ponnampalam | Zendy; R. G. DeCorby | Zendy; H. T. Nguyen | Zendy; Prabhat K. Dwivedi | Zendy; C.J. Haugen | Zendy; J.N. McMullin | Zendy; Safa Kasap | Zendy

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Small core rib waveguides with embedded gratings in As2Se3 glass

Author(s) -

N. Ponnampalam,

R. G. DeCorby,

H. T. Nguyen,

Prabhat K. Dwivedi,

C.J. Haugen,

J.N. McMullin,

Safa Kasap

Publication year - 2004

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/opex.12.006270

Subject(s) - materials science , optics , phosfos , core (optical fiber) , fiber bragg grating , refractive index , optoelectronics , optical fiber , plastic optical fiber , fiber optic sensor , wavelength , physics , composite material

Low-loss shallow-rib waveguides were fabricated using As2Se3 chalcogenide glass and polyamide-imide polymer. Waveguides were patterned directly in the As2Se3 layer by photodarkening followed by selective wet etching. Theory predicted a modal effective area of 3.5-4 microm2, and this was supported by near-field modal measurements. The Fabry-Perot technique was used to estimate propagation losses as low as ~0.25 dB/cm. First-order Bragg gratings near 1550 nm were holographically patterned in some waveguides. The Bragg gratings exhibited an index modulation on the order of 0.004. They were used as a means to assess the modal effective indices of the waveguides. Small core As2Se3 waveguides with embedded Bragg gratings have potential for realization of all-optical Kerr effect devices.

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