Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Joona, Rissanen"'
Autor:
Tomi Passi, Kristian Lukander, Jari Laarni, Johanna Närväinen, Joona Rissanen, Jani P. Vaara, Kai Pihlainen, Kari Kallinen, Tommi Ojanen, Saija Mauno, Satu Pakarinen
Publikováno v:
Frontiers in Psychology, Vol 13 (2022)
Understanding the effect of stress, fatigue, and sleep deprivation on the ability to maintain an alert and attentive state in an ecologically valid setting is of importance as lapsing attention can, in many safety-critical professions, have devastati
Externí odkaz:
https://doaj.org/article/ac64e577e18147919b94273e192a449f
Autor:
Andrey B. Petrov, Grigory A. Mikhailovsky, Alexander V. Gorbatchev, Maxim A. Odnoblyudov, Joona Rissanen, Valery N. Filippov, Regina V. Gumenyuk
Publikováno v:
Journal of Lightwave Technology. 40:3930-3934
We experimentally demonstrate the highest spectral brightness for the pulsed fiber lasers to the best of our knowledge in a compact high power and pulse energy laser system consisting of a DFB laser diode as a master oscillator and a high-power fiber
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83e8e3055136546dc04484e2998249f0
https://doi.org/10.1109/jlt.2022.3149350
https://doi.org/10.1109/jlt.2022.3149350
Autor:
Andrei, Fedotov, Vasilii, Ustimchik, Joona, Rissanen, Alexander, Kolosovskii, Victor, Voloshin, Igor, Vorob'ev, Regina, Gumenyuk, Yuri, Chamorovskiy, Valery, Filippov
Publikováno v:
Optics express. 29(11)
We addressed the problem of a state of polarization (SOP) drift caused by heating under intense clad pumping in different types of active tapered double-clad fibers. We investigated experimentally the variations of the SOP and degree of polarization
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::be0fb33c98f66d2d54b0f39a45eb7476
https://pubmed.ncbi.nlm.nih.gov/34154212
https://pubmed.ncbi.nlm.nih.gov/34154212
Autor:
Valery Filippov, Victor Voloshin, Andrei B. Fedotov, I. L. Vorob’ev, Yuri Chamorovskii, Joona Rissanen, Teppo Noronen, Regina Gumenyuk, A. O. Kolosovskii, Vasilii Ustimchik
Publikováno v:
Fiber Lasers XVIII: Technology and Systems.
We developed ytterbium-doped double-clad large mode area (MFD = 30 µm) spun tapered fibers with low internal birefringence and perfect beam quality (M2 < 1.2). Picosecond MOPA system (95ps/100 MHz, 1064 nm) based on proposed active tapered fiber wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8100b7caee2e3ca7227ab9ce49bd9c6c
https://doi.org/10.1117/12.2577834
https://doi.org/10.1117/12.2577834
Autor:
Valery Filippov, Andrey B. Petrov, Regina Gumenyuk, Maxim A. Odnoblyudov, Joona Rissanen, Grigory Mikhailovsky, Mikhail Kozlyakov, Alexander Gorbatchev
Publikováno v:
Fiber Lasers XVIII: Technology and Systems.
We present the results of compact and cost-efficient high-power and energy laser system based on a picosecond gain-switched DFB laser diode operating at a wavelength of 1064 nm with spectral linewidth less than 0.1 nm and pulse duration of 50 ps and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2480e3381a6216bfad57992563f0d47d
https://doi.org/10.1117/12.2577634
https://doi.org/10.1117/12.2577634
Autor:
Vasilii Ustimchik, Yuri Chamorovskii, Teppo Noronen, Joona Rissanen, A. O. Kolosovskii, I. L. Vorob’ev, Andrei B. Fedotov, Valery Filippov, Victor Voloshin, Regina Gumenyuk
We performed a comparative study of Yb-doped double-clad large mode area ( M F D = 31 µ m ) spun tapered fibers with different pitch lengths. A novel type of spun tapered fibers with constant pitch lengths of 7.5, 15, and 30 mm, internal birefringen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dfba5d035af0883875809c89f304c300
https://trepo.tuni.fi/handle/10024/143803
https://trepo.tuni.fi/handle/10024/143803
Autor:
Ville Pekka Inkilä, Jari Laarni, Satu Pakarinen, Jaakko Havola, Kristian Lukander, Johanna Närväinen, Joona Rissanen, Kari Kallinen, Kai Pihlainen
Publikováno v:
Advances in Neuroergonomics and Cognitive Engineering ISBN: 9783030510404
AHFE (1)
AHFE (1)
This work presents a demonstrator system for supporting the assessment of workload, fatigue and acute stress in the military domain, in order to provide information of the cognitive readiness of individuals and groups. Based on a set of biosignal and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b04a83d86bcd27b6004f8e48dadfe48
https://doi.org/10.1007/978-3-030-51041-1_22
https://doi.org/10.1007/978-3-030-51041-1_22
Autor:
Valery Filippov, Andrei Fedotov, Vasilii Ustimchik, Regina Gumenyuk, Teppo Noronen, Yuri Chamorovskii, Joona Rissanen
Publikováno v:
Fiber Lasers XVII: Technology and Systems.
We present a single-mode narrow band linear-polarized picosecond green fiber source delivered up to 146.4 kW of peak power. The laser architecture is composed of frequency-doubled all-fiber MOPA system operating at 1064 nm. The commercially available
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a7193cd0303f83765b164e4b52be3480
https://doi.org/10.1117/12.2546003
https://doi.org/10.1117/12.2546003
Autor:
Kim, Patokoski, Joona, Rissanen, Teppo, Noronen, Regina, Gumenyuk, Yuri, Chamorovskii, Valery, Filippov, Juha, Toivonen
Publikováno v:
Optics express. 27(22)
High peak power, narrow linewidth sources continue to be in high demand. Fiber amplifiers are a compelling option to scale peak power of long 100-ns-pulses because of their compact size and robustness. Unfortunately, stimulated Brillouin scattering (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::a0dc922ce9c704feee103a65bc6e51cf
https://pubmed.ncbi.nlm.nih.gov/31684387
https://pubmed.ncbi.nlm.nih.gov/31684387
Autor:
Valery Filippov, Andrey Fedotov, Konstantin M. Golant, Yuri Chamorovskii, Maxim A. Odnoblyudov, Teppo Noronen, Vasiliy Ustimchik, Tapio Niemi, Joona Rissanen, Regina Gumenyuk
Publikováno v:
Optics express. 26(6)
We present a birefringent Yb-doped tapered double-clad fiber with a record core diameter of 96 μm. An impressive gain of over 38 dB was demonstrated for linearly polarized CW and pulsed sources at a wavelength of 1040 nm. For the CW regime the outpu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e0d4a63ea2fbcf9e84b65ddaff9d5996
https://pubmed.ncbi.nlm.nih.gov/29609346
https://pubmed.ncbi.nlm.nih.gov/29609346