Open AccessSmall core rib waveguides with embedded gratings in As2Se3 glass
Author(s) -
N. Ponnampalam,
R. G. DeCorby,
Hoa Thi Nguyen,
Prabhat K. Dwivedi,
C.J. Haugen,
J.N. McMullin,
S. O. 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.