Search Results - "Vainio, Markku"

Volatile fatty acids (VFAs) and methane from food waste and cow slurry: Comparison of biogas and VFA fermentation processes by Tampio, Elina A., Blasco, Lucia, Vainio, Markku M., Kahala, Minna M., Rasi, Saija E.

“…The potential of various biomasses for the production of green chemicals is currently one of the key topics in the field of the circular economy. Volatile…”
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High-power mid-infrared frequency comb from a continuous-wave-pumped bulk optical parametric oscillator by Ulvila, Ville, Phillips, C R, Halonen, Lauri, Vainio, Markku

“…We demonstrate that it is possible to obtain a mid-infrared optical frequency comb (OFC) experimentally by using a continuous-wave-pumped optical parametric…”
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Effect of Inoculum Pretreatment on the Composition of Microbial Communities in Anaerobic Digesters Producing Volatile Fatty Acids by Blasco, Lucia, Kahala, Minna, Tampio, Elina, Vainio, Markku, Ervasti, Satu, Rasi, Saija

“…Volatile fatty acids (VFAs) are intermediates in the methane formation pathway of anaerobic digestion and can be produced through the fermentation of organic…”
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Simple method for mid-infrared optical frequency comb generation with dynamic offset frequency tuning by Roiz, Mikhail, Kumar, Krishna, Karhu, Juho, Vainio, Markku

“…We present a simple method for fully stabilized mid-infrared optical frequency comb generation based on single-pass femtosecond optical parametric generation…”
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Photoacoustic characteristics of carbon-based infrared absorbers by Rossi, Jussi, Uotila, Juho, Sharma, Sucheta, Laurila, Toni, Teissier, Roland, Baranov, Alexei, Ikonen, Erkki, Vainio, Markku

“…We present an experimental comparison of photoacoustic responsivities of common highly absorbing carbon-based materials. The comparison was carried out with…”
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Use of local resources as co-substrates in a farm-scale biogas plant by Ervasti, Satu, Vainio, Markku, Tampio, Elina

“…Biogas production is an established technology that is suitable for small-scale decentralized solutions, for example, on dairy cattle farms where manure is…”
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Anaerobic Digestion of Solid Agricultural Biomass in Leach-Bed Reactors by Pyykkönen, Ville, Winquist, Erika, Seppänen, Ari-Matti, Vainio, Markku, Virkkunen, Elina, Koppelmäki, Kari, Rasi, Saija

“…This study focuses on the feasibility of the dry anaerobic digestion of solid agricultural biomass for efficient renewable-energy production and nutrient…”
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Efficient carrier-envelope phase tunable mid-infrared frequency combs based on CW-seeded optical parametric generation by Roiz, Mikhail, Lai, Jui-Yu, Karhu, Juho, Vainio, Markku

“…We present an efficient method for generating frequency combs in the mid-infrared (MIR) spectral range in bulk lithium niobate crystals as well as in…”
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Fully stabilized mid-infrared frequency comb for high-precision molecular spectroscopy by Vainio, Markku, Karhu, Juho

“…A fully stabilized mid-infrared optical frequency comb spanning from 2.9 to 3.4 µm is described in this article. The comb is based on half-harmonic generation…”
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Frequency-comb-referenced mid-infrared source for high-precision spectroscopy by Peltola, Jari, Vainio, Markku, Fordell, Thomas, Hieta, Tuomas, Merimaa, Mikko, Halonen, Lauri

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Versatile optical frequency combs based on multi-seeded femtosecond optical parametric generation by Roiz, Mikhail, Vainio, Markku

“…This study proposes and demonstrates a versatile method for near- and mid-infrared optical frequency comb generation using multi-seeded femtosecond optical…”
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Sub-parts-per-trillion level sensitivity in trace gas detection by cantilever-enhanced photo-acoustic spectroscopy by Tomberg, Teemu, Vainio, Markku, Hieta, Tuomas, Halonen, Lauri

“…An exceptional property of photo-acoustic spectroscopy is the zero-background in wavelength modulation configuration while the signal varies linearly as a…”
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Calibration-free infrared absorption spectroscopy using cantilever-enhanced photoacoustic detection of the optical power by Rossi, Jussi, Vainio, Markku

“…We report on sensitive tunable laser absorption spectroscopy using a multipass gas cell and a solid-state photoacoustic optical power detector. Unlike…”
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Diode-laser-pumped continuous-wave optical parametric oscillator with a large mid-infrared tuning range by Ulvila, Ville, Vainio, Markku

“…We report a singly resonant continuous-wave optical parametric oscillator (SRO), which is pumped by a simple semiconductor laser system and operates in the…”
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Infrared spectroscopy of radioactive hydrogen chloride H36Cl by Larnimaa, Santeri, Vainio, Markku, Ulvila, Ville

“…•This is the first report of optical absorption measurements of H36Cl.•The fundamental and first overtone rovibrational bands have been characterized.•The line…”
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Experimental study of the effect of phase mismatch on a CW-pumped cascaded quadratic nonlinear frequency comb by Ulvila, Ville, Vainio, Markku

“…Optical frequency comb generation by continuous-wave-pumped cascaded quadratic nonlinearities (CQN) appears a promising alternative to well-established…”
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Terahertz radiation detection with a cantilever-based photoacoustic sensor by Sharma, Sucheta, Ahmadi, Mohsen, Rossi, Jussi, Vainio, Markku, Sun, Zhipei, Steiger, Andreas, Ikonen, Erkki

“…We report the photoacoustic (PA) response in the terahertz (THz) range by employing a detection process actuated with a silicon cantilever pressure sensor and…”
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Photoacoustic phase-controlled Fourier-transform infrared spectroscopy by Larnimaa, Santeri, Roiz, Mikhail, Vainio, Markku

“…We demonstrate a 13-fold speed improvement in broadband cantilever-enhanced photoacoustic spectroscopy (CEPAS) by combining it with phase-controlled…”
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Electromagnetic radiation detection using cantilever-based photoacoustic effect: A method for realizing power detectors with broad spectral sensitivity and large dynamic range by Sharma, Sucheta, Laurila, Toni, Rossi, Jussi, Uotila, Juho, Vainio, Markku, Manoocheri, Farshid, Ikonen, Erkki

“…•This paper presents a detector of electromagnetic radiation power using cantilever-based photoacoustic effect.•A numerical model has been developed to…”
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Cantilever-enhanced photoacoustic measurement of light-absorbing aerosols by Karhu, Juho, Kuula, Joel, Virkkula, Aki, Timonen, Hilkka, Vainio, Markku, Hieta, Tuomas

“…Photoacoustic detection is a sensitive method for measurement of light-absorbing particles directly in the aerosol phase. In this article, we demonstrate a new…”
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