Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Juha Harra"'
Autor:
Pauli Kiiveri, Joona Koponen, Juha Harra, Ossi Kimmelma, Jijo Paul, Ville Aallos, Steffen Novotny, Hannu Husu, Heikki Ihalainen
Publikováno v:
IEEE Photonics Journal, Vol 11, Iss 6, Pp 1-10 (2019)
Refractive index profile of the core is a key design parameter in fiber lasers and amplifiers. During manufacturing, the initial information of the index profile is obtained from the preform, while ultimately the performance is defined by the index p
Externí odkaz:
https://doaj.org/article/b95c7d2976504a0cb03aeb6468da4eb0
Autor:
Pauli Kiiveri, Mikko Kuusisto, Joona Koponen, Ossi Kimmelma, Ville Aallos, Juha Harra, Hannu Husu, Päivi Kyllönen, Manoj Kanskar
Publikováno v:
Fiber Lasers XIX: Technology and Systems.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35886f843c7ba26515441bc353be9151
https://doi.org/10.1117/12.2609635
https://doi.org/10.1117/12.2609635
Autor:
Ossi Kimmelma, Heikki Ihalainen, Ville Aallos, Steffen Novotny, Hannu Husu, Jijo Paul, Pauli Kiiveri, Juha Harra, Joona Koponen
Publikováno v:
IEEE Photonics Journal, Vol 11, Iss 6, Pp 1-10 (2019)
Refractive index profile of the core is a key design parameter in fiber lasers and amplifiers. During manufacturing, the initial information of the index profile is obtained from the preform, while ultimately the performance is defined by the index p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c0b76c60de83e0e9127c523f99413a6
https://ieeexplore.ieee.org/document/8846739/
https://ieeexplore.ieee.org/document/8846739/
Autor:
Christian Stenroos, Petri Vuoristo, Johanna Lahti, Paxton Juuti, Janne Haapanen, Juha Harra, Jenny Rissler, Jurkka Kuusipalo, Jyrki M. Mäkelä, Heli Koivuluoto, Hannu Teisala, Mikko Tuominen, Henna Niemelä-Anttonen
Publikováno v:
Journal of Coatings Technology and Research. 15:623-632
An atmospheric pressure aerosol-based wet thin film coating technique called the nFOG is characterized and applied in polymer film coatings. In the nFOG, a fog of droplets is formed by two air-assist atomizers oriented toward each other inside a depo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7469d4fd7a2702cf335811c7e247befa
https://doi.org/10.1007/s11998-017-0022-7
https://doi.org/10.1007/s11998-017-0022-7
Publikováno v:
Aerosol Science and Technology. 51:1429-1437
In this article, a proof of concept of a new measurement instrument, differential diffusion analyzer (DDA), is established. The DDA enables the measurement of the size distribution of sub-10 nm aer...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f310e313bc0935d93f2fd2999de48c5
https://doi.org/10.1080/02786826.2017.1367089
https://doi.org/10.1080/02786826.2017.1367089
Publikováno v:
KONA Powder and Particle Journal. 34:141-154
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d9bdb33b98d06873b6ceb357d4cc959
https://doi.org/10.14356/kona.2017020
https://doi.org/10.14356/kona.2017020
Publikováno v:
Aerosol Science and Technology. 51:301-310
The critical velocity of rebound was determined for spherical ammonium fluorescein particles in the size range of 0.44–7.3 μm. The method was based on measurements with a variable nozzle area impactor (VNAI) and numerical simulations. A comparison
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3147d0c65185d25b0f25f32a8ca1b265
https://doi.org/10.1080/02786826.2016.1260088
https://doi.org/10.1080/02786826.2016.1260088
Autor:
Hannu Husu, Steffen Novotny, Joona Koponen, Jijo Paul, Pauli Kiiveri, Juha Harra, Ville Aallos, Heikki Ihalainen, Ossi Kimmelma
Publikováno v:
Fiber Lasers XVI: Technology and Systems.
It is possible to predict more accurately the laser fiber refractive index when we apply a stress induced index change model together with the measured preform index profile data. The improved fiber index difference estimates enable to fine tune the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36be75b58be46dcb87ee94b014bc31bc
https://doi.org/10.1117/12.2505040
https://doi.org/10.1117/12.2505040
Autor:
Mari Honkanen, Leo Hyvärinen, Sonja Kujanpää, Janne Haapanen, Paxton Juuti, Jyrki M. Mäkelä, Juha Harra
Publikováno v:
AIChE Journal. 63:881-892
The quality of aerosol-produced nanopowders can be impaired by micron-sized particles formed due to non-uniform process conditions. Methods to evaluate the quality reliably and fast, preferably on-line, are important at industrial scales. Here, aeros
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c3ca7381e0450a895e9e6640769b2a50
https://doi.org/10.1002/aic.15449
https://doi.org/10.1002/aic.15449
Publikováno v:
Aerosol Science and Technology. 50:487-496
A new instrument, density monitor (DENSMO), for aerosol particle size distribution characterization and monitoring has been developed. DENSMO is operationally simple and capable of measuring the effective density as well as the aerodynamic and the mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23c133b3d39f7e91c50fb08ce3adc96d
https://doi.org/10.1080/02786826.2016.1168511
https://doi.org/10.1080/02786826.2016.1168511