Design of waveguide grating with ultrafast tunable index contrast

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A long-period waveguide grating (LPWG) with a tunable index contrast is proposed. The design features a simple configuration that consists of a two-mode waveguide formed on periodically poled lithium niobate with an angle with respect to its domain wall and a traveling-wave electrode. In the design, the electrical traveling wave introduces a periodic change in the refractive index of waveguide, which functions as a long-period waveguide grating that couples between symmetric and antisymmetric core modes. The index contrast of grating can be controlled by the traveling-wave intensity. For application to ultrafast device, structural parameters satisfying velocity and impedance matching conditions are numerically calculated. (C) 2011 Optical Society of America
Publisher
OPTICAL SOC AMER
Issue Date
2011-07
Language
English
Article Type
Article
Keywords

LITHIUM-NIOBATE; FIBER GRATINGS; CRYSTAL FIBER; 2-MODE FIBER; WAVELENGTH; MODULATORS; WRITTEN; STRAIN

Citation

OPTICS EXPRESS, v.19, no.14, pp.13047 - 13055

ISSN
1094-4087
URI
http://hdl.handle.net/10203/100280
Appears in Collection
PH-Journal Papers(저널논문)
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