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Efficient nonlinear frequency conversion in an all-resonant double- lambda system

Merriam1, Sharpe, Shverdin

  • 1Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.

Physical Review Letters
|September 16, 2000
PubMed
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Researchers achieved efficient ultraviolet light conversion in a novel system, reaching vacuum ultraviolet wavelengths. This nonlinear frequency conversion demonstrates high efficiency with modest power and atomic density, verifying theoretical predictions.

Area of Science:

  • Nonlinear Optics
  • Atomic Physics
  • Quantum Electronics

Background:

  • Nonlinear frequency conversion is crucial for generating new light wavelengths.
  • Quadruply resonant systems offer enhanced light-matter interactions.
  • Theoretical predictions of Rabi-frequency matching in absorbing media require experimental verification.

Purpose of the Study:

  • To demonstrate efficient, pulsed, gas-phase, nonlinear frequency conversion.
  • To verify theoretical predictions of Rabi-frequency matching in absorbing nonlinear media.
  • To achieve vacuum ultraviolet (VUV) light generation via frequency up-conversion.

Main Methods:

  • Utilizing a quadruply resonant, double-Lambda system.
  • Employing pulsed laser excitation in atomic Pb vapor.

Related Experiment Videos

  • Measuring small-signal conversion efficiencies and Rabi-frequency matching.

    • Main Results:

    • Achieved efficient up-conversion of ultraviolet light (233 nm) to vacuum ultraviolet (186 nm).
    • Exceeded 30% small-signal conversion efficiencies.
    • Verified Rabi-frequency matching predictions in an absorbing nonlinear medium.
    • Operated with modest atomic density-length products (10^14 cm^-2) and optical power densities (10-100 kW/cm^2).

    Conclusions:

    • The demonstrated system provides an efficient method for VUV generation.
    • Experimental results validate theoretical models for nonlinear frequency conversion in absorbing media.
    • This work opens avenues for advanced spectroscopic and photonic applications.