TY - GEN
T1 - A widely tunable difference-frequency-generation laser for high-resolution spectroscopy in the 667-865 cm-1range
AU - Shakfa, Mohammad Khaled
AU - Lamperti, Marco
AU - Gotti, Riccardo
AU - Gatti, Davide
AU - Elkhazraji, Ali
AU - Hakimov, Khaiyom
AU - Marangoni, Marco
AU - Farooq, Aamir
N1 - Funding Information:
This work was funded by the Office of Sponsored Research (OSR) at King Abdullah University of Science and Technology (KAUST).
Funding Information:
This work was funded by the Office of Sponsored Research (OSR) at King Abdullah University of Technology (KAUST).
Publisher Copyright:
© 2021 SPIE.
PY - 2021
Y1 - 2021
N2 - Mid-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).
AB - Mid-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).
KW - Difference frequency generation
KW - High-resolution spectroscopy
KW - Laser spectroscopy
KW - Mid-infrared laser sources
UR - http://www.scopus.com/inward/record.url?scp=85107050080&partnerID=8YFLogxK
U2 - 10.1117/12.2577534
DO - 10.1117/12.2577534
M3 - Conference contribution
AN - SCOPUS:85107050080
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Nonlinear Frequency Generation and Conversion
A2 - Schunemann, Peter G.
A2 - Schepler, Kenneth L.
PB - SPIE
T2 - Nonlinear Frequency Generation and Conversion: Materials and Devices XX 2021
Y2 - 6 March 2021 through 11 March 2021
ER -