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Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
Published on: March 22, 2019
Ultraviolet four-wave mixing in the LP(02) fiber mode.
Optics Letters
|October 2, 2013
Summary
Researchers achieved ultraviolet four-wave mixing in a photonic crystal fiber using a 532 nm laser. This process generated ultraviolet signals at wavelengths as short as 342 nm.
Area of Science:
- Optics and Photonics
- Nonlinear Optics
- Fiber Optics
Background:
- Four-wave mixing (FWM) is a nonlinear optical process crucial for wavelength generation.
- Photonic crystal fibers (PCFs) offer unique dispersion properties for nonlinear applications.
- Operating in the normal dispersion regime presents challenges for certain nonlinear processes.
Purpose of the Study:
- To demonstrate ultraviolet (UV) four-wave mixing (FWM) in the LP(02) mode of a PCF.
- To investigate UV FWM generation in the normal dispersion regime.
- To achieve short-wavelength UV generation using a readily available laser source.
Main Methods:
- Utilized a frequency-doubled 532 nm microchip laser as the pump source.
- Employed a broadband all-fiber mode converter to generate a pure LP(02) mode for the pump light.
- Characterized the generated UV wavelengths from the PCF.
Main Results:
- Successfully generated UV four-wave mixing in the LP(02) mode of the PCF.
- Operated the experiment within the normal dispersion regime of the fiber.
- Achieved generation of UV signal wavelengths as short as 342 nm.
Conclusions:
- Demonstrated the feasibility of UV FWM in the LP(02) mode of PCF under normal dispersion.
- The use of a mode converter enabled efficient excitation of the desired mode.
- This work opens possibilities for compact UV light sources in the sub-350 nm range.
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