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Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
Published on: March 22, 2019
Broadband mid-infrared frequency upconversion and spectroscopy with an aperiodically poled LiNbO3 waveguide
Tyler W Neely1, Lora Nugent-Glandorf, Florian Adler
1National Institute of Standards and Technology, Time and Frequency Division, Mail Stop 847, 325 Broadway, Boulder, Colorado 80305, USA. t.neely@uq.edu.au
Optics Letters
|October 18, 2012
Summary
Researchers developed a method to convert mid-infrared light to near-infrared wavelengths using a specialized waveguide. This frequency conversion technique enables precise spectroscopic measurements of gases like methane.
Area of Science:
- Quantum Optics and Photonics
- Nonlinear Optics
- Spectroscopy
Background:
- Mid-infrared (mid-IR) light sources are crucial for molecular spectroscopy.
- Converting mid-IR light to near-infrared (NIR) wavelengths simplifies detection using standard equipment.
- Aperiodic optical superlattices offer unique nonlinear optical properties for frequency conversion.
Purpose of the Study:
- To demonstrate efficient upconversion of mid-IR light to NIR wavelengths using a novel waveguide.
- To evaluate the performance of this upconversion technique for high-resolution gas spectroscopy.
- To assess the stability of the upconverted light for precise measurements.
Main Methods:
- Sum-frequency generation (SFG) in an aperiodically poled lithium niobate (ZnO:LiNbO3) waveguide.
- Utilizing a 1.064 μm continuous-wave (CW) laser for efficient frequency mixing.
- Characterization of conversion efficiency, spectral bandwidth, and spatial mode of the upconverted light.
Main Results:
- Successful upconversion of light from 2.5-4.5 μm to 0.76-0.86 μm in a single device.
- Detection and resolution of individual methane absorption lines using a NIR optical spectrum analyzer.
- Analysis of the upconverted light's spectral stability for spectroscopic applications.
Conclusions:
- The developed ZnO:LiNbO3 waveguide enables efficient mid-IR to NIR frequency conversion.
- This upconversion technique is suitable for high-precision spectroscopic analysis of gases.
- The method offers a promising route for compact and versatile spectroscopic instrumentation.
