Juha Toivonen
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Explore the profile of Juha Toivonen including associated specialties, affiliations and a list of published articles.
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44
Citations
83
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Recent Articles
1.
Kalmankoski K, Shang X, Komppula M, Toivonen J
Opt Express
. 2025 Jan;
33(2):3325-3338.
PMID: 39876459
Coherent heterodyne lidars are typically used for windspeed and attenuated backscattering measurements. The lack of molecular backscattering detection capability has limited the calibrated backscattering measurements until recent advances in coherent...
2.
Das S, Uddin M, Li D, Wang Y, Dai Y, Toivonen J, et al.
Light Sci Appl
. 2025 Jan;
14(1):41.
PMID: 39779663
Coherent broadband light generation has attracted massive attention due to its numerous applications ranging from metrology, sensing, and imaging to communication. In general, spectral broadening is realized via third-order and...
3.
Detection of molecular backscattering with a tapered fiber amplifier based coherent heterodyne lidar
Kalmankoski K, Toivonen J
Opt Express
. 2024 Jun;
32(11):18831-18842.
PMID: 38859031
Fiber based coherent heterodyne lidars are highly valued and robust tools especially in sensing of wind speed and turbulence in the atmosphere. The magnitude of aerosol backscattering is also possible...
4.
Heikkila P, Rostedt A, Toivonen J, Keskinen J
Sci Rep
. 2024 Mar;
14(1):7482.
PMID: 38553583
No abstract available.
5.
Saleh A, Kalmankoski K, Genty G, Toivonen J
Opt Express
. 2023 Jul;
31(15):23889-23896.
PMID: 37475229
We report real-time monitoring of coarse aerosol particle distribution in a 9 m wide full-scale industrial boiler using a broadband supercontinuum lidar. The technique utilizes the light backscattered from the...
6.
Saleh A, Mekhrengin M, Donsberg T, Kaariainen T, Genoud G, Toivonen J
Sci Rep
. 2022 Nov;
12(1):19392.
PMID: 36371513
We report a novel hyperspectral sensor employing a Fabry-Pérot interferometer based on micro-electro-mechnical system and a custom mid-infrared supercontinuum laser. The Fabry-Pérot interferometer allows on-axis filtering, of spectral components of...
7.
Heikkila P, Rostedt A, Toivonen J, Keskinen J
Sci Rep
. 2022 Aug;
12(1):14657.
PMID: 36038603
Analysing the composition of aerosol particles is essential when studying their health effects, sources and atmospheric impacts. In many environments the relevant particles occur in very low concentrations, meaning that...
8.
Mikkonen T, Hieta T, Genty G, Toivonen J
Phys Chem Chem Phys
. 2022 Aug;
24(32):19481-19487.
PMID: 35929451
We report multipass broadband photoacoustic spectroscopy of trace gases in the mid-infrared. The measurement principle of the sensor relies on supercontinuum-based Fourier transform photoacoustic spectroscopy (FT-PAS), in which a scanning...
9.
Mikkonen T, Eslami Z, Genty G, Toivonen J
Opt Lett
. 2022 Apr;
47(7):1713-1716.
PMID: 35363715
We investigate the noise transfer mechanism from the light source intensity fluctuations to the acoustic signal in Fourier transform photoacoustic spectroscopy (FT-PAS). This noise coupling is expected to be reduced...
10.
Bitarafan M, Annurakshita S, Toivonen J, Bautista G
Opt Lett
. 2021 Mar;
46(6):1197-1200.
PMID: 33720146
We demonstrate a high-speed optical technique to fabricate plasmonic metasurfaces in a polymer film. The technique is based on a programmable spatial light modulator, which is used to spatially control...