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

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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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