Design and modelling of dispersion-engineered rib waveguide for ultra broadband mid-infrared supercontinuum generation

Saini, T.S. and Kumar, Ajeet and Sinha, R.K. (2016) Design and modelling of dispersion-engineered rib waveguide for ultra broadband mid-infrared supercontinuum generation. Journal of Modern Optics , 64 (2). pp. 143-149. ISSN 0950-0340

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Official URL: http://www.tandfonline.com/doi/full/10.1080/095003...

Abstract

We report a dispersion-engineered As2Se3 chalcogenide glass rib waveguide structure for ultra broadband mid-infrared supercontinuum generation across molecular ‘fingerprint region’. The proposed rib waveguide structure offers non-linear coefficient as high as 18,250 W−1 km−1 at 2.5 μm. Supercontinuum spectrum spanning 2–15 μm, which not only covers the both atmospheric transparent windows (3–5 μm and 8–13 μm) in the mid-infrared domain but also covers the important molecular ‘fingerprint domain’, is obtained using only 4 mm-long rib waveguide structure. To the best of our knowledge, such broadband mid-infrared supercontinuum spectrum in As2Se3-based chalcogenide waveguide geometry is reported for the first time. The proposed design of rib waveguide has potential for robust, integrated and low-cost supercontinuum sources in various applications including frequency comb generation, chemical sensing, food quality control and early cancer diagnostics.

Item Type: Article
Uncontrolled Keywords: Non-linear optics; highly non-linear rib waveguide; mid-infrared supercontinuum generation
Subjects: CSIO > Photonics Instrumentation
Divisions: Photonics Instrumentation
Depositing User: Ms. Jyotsana
Date Deposited: 09 Aug 2018 11:53
Last Modified: 09 Aug 2018 11:53
URI: http://csioir.csio.res.in/id/eprint/705

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