Dispersion engineering of suspended silicon photonic waveguides for broadband mid-infrared wavelength conversion

Xibin Li, Ping Zhou, Sailing He, Shiming Gao

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Silicon photonics has much potential in the mid-infrared (MIR) band due to the broad low-loss window of silicon. The performance of wavelength conversion based on degenerate four-wave mixing is theoretically evaluated in suspended silicon waveguides, which are adopted to eliminate the strong absorption of silica in the MIR region. A theoretical model is formed for MIR wavelength conversion by taking the nonlinear loss into account, where threephoton absorption and related free-carrier absorption play dominant roles. The relationship of the dispersion and the waveguide dimensions is analyzed, and the dispersion is manipulated by tuning the cross section of the waveguide. The phase mismatch is effectively reduced, and a MIR band conversion bandwidth as broad as 706 nm is obtained witha conversion efficiency of -20.5 dBin an 8 mmlong suspended silicon waveguide pumpedby alight intensity as low as 0.1 GW/cm2.

Original languageEnglish (US)
Pages (from-to)2295-2301
Number of pages7
JournalJournal of the Optical Society of America B: Optical Physics
Volume31
Issue number10
DOIs
StatePublished - Oct 1 2014
Externally publishedYes

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engineering
photonics
broadband
waveguides
silicon
wavelengths
four-wave mixing
tuning
silicon dioxide
bandwidth
cross sections

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Statistical and Nonlinear Physics

Cite this

Dispersion engineering of suspended silicon photonic waveguides for broadband mid-infrared wavelength conversion. / Li, Xibin; Zhou, Ping; He, Sailing; Gao, Shiming.

In: Journal of the Optical Society of America B: Optical Physics, Vol. 31, No. 10, 01.10.2014, p. 2295-2301.

Research output: Contribution to journalArticle

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