Publications (4)
Broadband photoacoustic spectroscopy of with a high-power mid-infrared optical frequency comb
Juho Karhu, Teemu Tomberg, Francisco Senna Vieira +7
We report a photoacoustic spectroscopy setup with a high-power mid-infrared frequency comb as the light source. The setup is used in broadband spectroscopy of radiocarbon methane.…
Sub-part-per-trillion level detection of hydrogen fluoride by cantilever-enhanced photo-acoustic spectroscopy
Teemu Tomberg, Markku Vainio, Tuomas Hieta +1
We present a highly sensitive hydrogen fluoride detector based on simple cantilever-enhanced photo-acoustic spectroscopy. A noise equivalent concentration of 5 parts-per-trillion w…
High-resolution analysis of the band of radiocarbon methane
Santeri Larnimaa, Lauri Halonen, Juho Karhu +6
We present the first high-resolution measurements and rotational analysis of the fundamental asymmetric stretching vibrational band of radiocarbon methane. A spectrom…
Spectral characterization of a frequency comb based on cascaded quadratic nonlinearities inside an optical parametric oscillator
Ville Ulvila, C. R. Phillips, Lauri Halonen +1
We present an experimental study of optical frequency comb generation based on cascaded quadratic nonlinearities inside a continuous-wave-pumped optical parametric oscillator. We d…