Few-cycle nonlinear mid-IR pulse generated with cascaded quadratic nonlinearities

Morten Bache, Xing Liu, Binbin Zhou

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    Generating few-cycle energetic and broadband mid-IR pulses is an urgent current challenge in nonlinear optics. Cascaded second-harmonic generation (SHG) gives access to an ultrafast and octave-spanning self-defocusing nonlinearity: when ΔkL >> 2π the pump experiences a Kerr-like nonlinear index change Δn = ncascI, where ncase ∝ −d2eff/Δk, and deff is the effective quadratic nonlinearity. Due to competing material nonlinearities nKerr the total nonlinear refractive is ncubic = ncasc + nKerr. Interestingly ncubic can become negative (self-defocusing), elegantly avoiding self-focusing problems, and making it possible to excite solitons with normal dispersion [1].
    Original languageEnglish
    Publication date2013
    Number of pages1
    Publication statusPublished - 2013
    Event2013 Conference on Lasers & Electro-Optics Europe & the International Quantum Electronics Conference (CLEO/Europe-IQEC) - Munich, Germany
    Duration: 12 May 201316 May 2013


    Conference2013 Conference on Lasers & Electro-Optics Europe & the International Quantum Electronics Conference (CLEO/Europe-IQEC)
    Internet address


    • optical harmonic generation
    • optical Kerr effect
    • optical pulse generation
    • optical pumping
    • optical solitons
    • refractive index
    • Aerospace
    • Bioengineering
    • Communication, Networking and Broadcast Technologies
    • Components, Circuits, Devices and Systems
    • Engineered Materials, Dielectrics and Plasmas
    • Engineering Profession
    • Fields, Waves and Electromagnetics
    • General Topics for Engineers
    • Nuclear Engineering
    • Photonics and Electrooptics
    • Power, Energy and Industry Applications
    • cascaded quadratic nonlinearity
    • cascaded second-harmonic generation
    • Dispersion
    • effective quadratic nonlinearity
    • few-cycle nonlinear broadband midIR pulse generation
    • few-cycle nonlinear energetic midIR pulse generation
    • Frequency conversion
    • Kerr-like nonlinear index change
    • Nonlinear optics
    • octave-spanning self-defocusing nonlinearity
    • Optical pulse compression
    • Optical solitons
    • SHG
    • total nonlinear refractive index
    • Ultrafast optics
    • ultrafast self-defocusing nonlinearity


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