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Updated: Jun 20, 2026
10:42
Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
Published on: March 22, 2019
High-efficiency four-wave sum and difference mixing in Hg vapor.
Optics Letters
|August 25, 2009
Summary
Researchers utilized mercury vapor for nonlinear frequency upconversion, achieving 5 kW peak power at 1251 Å. This study demonstrates efficient generation of tunable vacuum ultraviolet radiation using mercury vapor as a nonlinear medium.
Area of Science:
- Nonlinear Optics
- Atomic Physics
- Quantum Electronics
Background:
- Nonlinear frequency conversion is crucial for generating light at new wavelengths.
- Mercury vapor offers unique resonant properties for nonlinear optical processes.
- Generating tunable vacuum ultraviolet (VUV) radiation remains a significant challenge.
Purpose of the Study:
- To investigate mercury vapor as a nonlinear frequency upconverting medium.
- To achieve efficient generation of tunable VUV radiation.
- To explore parametric oscillation and frequency mixing in mercury vapor.
Main Methods:
- A tunable laser system operating at 10 Hz was employed.
- Frequency upconversion was performed using mercury vapor.
- Parametric oscillation and sum-frequency mixing (2ω1 - ω2) were utilized.
Main Results:
- Peak powers of 5 kW were achieved at 1251 Å.
- An energy conversion efficiency of 0.3% was obtained.
- Tunable radiation was generated at 2085 Å and 1833 Å, alongside parametric oscillation at 1849 Å.
Conclusions:
- Mercury vapor is an effective medium for nonlinear frequency upconversion.
- The system demonstrates efficient generation of tunable VUV radiation.
- The reported nonlinear processes in mercury vapor open avenues for VUV spectroscopy and applications.
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