TY - GEN
T1 - Infrared laser frequency combs for multispecies gas detection
AU - Vainio, M.
AU - Ulvila, V.
AU - Halonen, L.
N1 - Funding Information:
Acknowledgments We thank the Academy of Finland, the Finnish Funding Agency for Innovation (Tekes), and the University of Helsinki for financial support.
Publisher Copyright:
© Springer Science+Business Media B.V. 2017.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/1/1
Y1 - 2017/1/1
N2 - We discuss two methods for mid-infrared frequency comb generation in quadratic nonlinear materials. The first one of these methods is based on halfharmonic generation in a degenerate femtosecond optical parametric oscillator, which is synchronously pumped with a near-infrared laser frequency comb. The second method uses a continuous-wave-pumped optical parametric oscillator. In this approach, the quadratic nonlinearity is used not only for frequency down conversion, but also for the actual frequency comb generation from a continuouswave pump laser field. Both methods can be used to produce coherent broadband mid-infrared light that is ideal for real-time spectroscopic detection of small traces of biomarkers, toxics, and other interesting molecular compounds. In particular, these methods provide access to the 3-5 μm molecular fingerprint region, which contains strong fundamental vibrational stretching bands of hydrocarbons.
AB - We discuss two methods for mid-infrared frequency comb generation in quadratic nonlinear materials. The first one of these methods is based on halfharmonic generation in a degenerate femtosecond optical parametric oscillator, which is synchronously pumped with a near-infrared laser frequency comb. The second method uses a continuous-wave-pumped optical parametric oscillator. In this approach, the quadratic nonlinearity is used not only for frequency down conversion, but also for the actual frequency comb generation from a continuouswave pump laser field. Both methods can be used to produce coherent broadband mid-infrared light that is ideal for real-time spectroscopic detection of small traces of biomarkers, toxics, and other interesting molecular compounds. In particular, these methods provide access to the 3-5 μm molecular fingerprint region, which contains strong fundamental vibrational stretching bands of hydrocarbons.
KW - Infrared spectroscopy
KW - Laser frequency comb
KW - Nonlinear optics
KW - Optical frequency comb
KW - Optical parametric oscillator
UR - http://www.scopus.com/inward/record.url?scp=85028351009&partnerID=8YFLogxK
UR - https://helda.helsinki.fi/handle/10138/311036
UR - https://researchportal.helsinki.fi/en/publications/infrared-laser-frequency-combs-for-multispecies-gas-detection
U2 - 10.1007/978-94-024-1093-8_18
DO - 10.1007/978-94-024-1093-8_18
M3 - Conference article in proceedings
AN - SCOPUS:85028351009
SN - 978-94-024-1092-1
VL - PartF1
T3 - NATO Science for Peace and Security Series B: Physics and Biophysics
SP - 151
EP - 158
BT - THz for CBRN and Explosives Detection and Diagnosis
A2 - Pereira, Mauro F.
A2 - Shulika, Oleksiy
PB - Springer
T2 - NATO Advanced Research Workshop on THz for CBRN and Explosives Detection and Diagnosis
Y2 - 3 November 2015 through 5 November 2015
ER -