A widely tunable difference-frequency-generation laser for high-resolution spectroscopy in the 667-865 cm-1range
AuthorsShakfa, Mohammad Khaled
KAUST DepartmentChemical Kinetics & Laser Sensors Laboratory
Clean Combustion Research Center
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
Permanent link to this recordhttp://hdl.handle.net/10754/669473
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AbstractMid-infrared (MIR) laser sources are used in a number of applications such as remote sensing, air pollution monitoring, combustion diagnostics, and molecular spectroscopy. Here, we present our work on the development of a MIR laser source based on the difference frequency generation (DFG) process between an external-cavity quantum-cascade-laser tunable over 1750-1835 cm-1 (pump source) and a CO2 gas laser tunable over 921-1083 cm-1 (signal source). The DFG process was realized in a nonlinear, orientation-patterned GaAs crystal, and resulted in an idler spectral range between 667-865 cm-1 with a linewidth of ∼2.3 MHz and an output power of up to ∼31 μW. Exploiting the fine tunability of our DFG laser source, we performed high-resolution absorption measurements of ethylene (C2H4) and acetylene (C2H2).
CitationShakfa, M. K., Lamperti, M., Gotti, R., Gatti, D., Elkhazraji, A., Hakimov, K., … Farooq, A. (2021). A widely tunable difference-frequency-generation laser for high-resolution spectroscopy in the 667–865 cm–1 range. Nonlinear Frequency Generation and Conversion: Materials and Devices XX. doi:10.1117/12.2577534
SponsorsThis work was funded by the Office of Sponsored Research (OSR) at King Abdullah University of Science and Technology (KAUST).
Conference/Event nameNonlinear Frequency Generation and Conversion: Materials and Devices XX 2021