High-performance Bragg gratings in chalcogenide rib waveguides written with a modified Sagnac interferometer
نویسندگان
چکیده
منابع مشابه
Sampled Bragg gratings in chalcogenide (As(2)S(3)) rib-waveguides.
We have written a sampled Bragg grating into a highly photosensitive chalcogenide (As(2)S(3)) rib-waveguide using a scanning Sagnac interferometer. The grating exhibits evenly spaced rejection peaks over a 40 nm bandwidth. We estimate the induced refractive index change of the waveguide to be over 0.03 by matching the measured spectrum to numerical solutions of the coupled mode equations while ...
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Firstand second-order Bragg reflectors at telecommunication wavelength (1.5 m) were fabricated in single-mode monolayer (As2S3) and multilayer (As-S-Se/As-S) chalcogenide glass (ChG) planar waveguides with near bandgap illumination using an interferometric technique. Reflectivities as high as 90% near 1555 nm, and index modulations up to 3 10 4 were achieved. The volume photodarkening effect is...
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We have developed a new approach for producing high performance sampled Bragg gratings in planar waveguides as a platform for WDM on-chip signal processing in a compact integrated device. Using this method we have successfully integrated a shadow mask directly onto a chalcogenide (As(2)S(3)) waveguide using standard semiconductor processing, eliminating misalignment errors between the mask and ...
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متن کاملIn situ loss measurement of direct UV-written waveguides using integrated Bragg gratings.
The propagation loss of a direct UV-written silica-on-silicon waveguide is measured using an elegant nondestructive method. The technique uses integrated Bragg grating structures, which are observed from opposing launch directions to obtain information about the optical power at different positions along the length of the waveguide. Critically, the technique is ratiometric and independent of co...
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ژورنال
عنوان ژورنال: Journal of the Optical Society of America B
سال: 2006
ISSN: 0740-3224,1520-8540
DOI: 10.1364/josab.23.001323