Study of low-peak-power highly coherent broadband supercontinuum generation through a dispersion-engineered Si-rich silicon nitride waveguide

Applied Optics
M R KarimB M A Rahman

Abstract

Since the first observation by Alfano and Shapiro in the 1970s [Phys. Rev. Lett.24, 584 (1970)PRLTAO0031-900710.1103/PhysRevLett.24.584], supercontinuum generation study has become an attractive research area in the field of broadband light source design, including its use in various applications associated with nonlinear optics in recent years. In this work, the numerical demonstration of ultrabroadband supercontinuum generation in the mid-infrared (MIR) region via the use of complementary metal-oxide semiconductor compatible Si-rich silicon nitride as the core in a planar waveguide design employing one of two materials, either LiNbO3 or MgF2 glass, as the top and bottom claddings is explored. A rigorous numerical investigation of broadband source design in the MIR using 2 mm long Si-rich silicon nitride waveguides is carried out in terms of waveguide structural parameter variations, input peak power variation, varying unexpected deformation of the waveguide along the core region during fabrication, and spectral coherence analysis. Among the several waveguide models studied, two promising designs are identified for wideband supercontinuum generation up to the MIR using a relatively low input peak power of 50 W. Simulation resu...Continue Reading

References

Oct 29, 2004·Nature·Vilson R AlmeidaMichal Lipson
Jun 15, 1984·Applied Optics·M J Dodge
Oct 20, 2003·Optics Express·Xun GuRobert Windeler
Feb 23, 2010·Optics Express·David DuchesneDavid J Moss
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Feb 12, 2014·Optics Express·Pan MaBarry Luther-Davies
Oct 30, 2015·Optics Letters·Kevin LukeMichal Lipson
Oct 30, 2015·Optics Letters·Adrea R JohnsonAlexander L Gaeta

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