Search Results - "Viheriälä, Jukka"

High-power single mode GaSb-based 2 μm superluminescent diode with double-pass gain by Zia, Nouman, Viheriälä, Jukka, Koivusalo, Eero, Guina, Mircea

“…We report a broadband superluminescent diode operating around a 2 μm wavelength, optimized for high-power broadband operation. The high power operation is…”
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Hybrid integrated GaSb/Si3N4 narrow linewidth (<50 kHz) distributed Bragg reflector laser by Ojanen, Samu-Pekka, Zia, Nouman, Viheriälä, Jukka, Koivusalo, Eero, Hilska, Joonas, Quashef, Ajwaad, Wallin, Anders, Hanhijärvi, Kalle, Fordell, Thomas, Guina, Mircea

“…A narrow linewidth hybrid integrated distributed Bragg reflector (DBR) laser platform operating at 2 μm wavelength region is demonstrated. The laser…”
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Improving P-Doped DBRs Operation at Cryogenic Temperatures: Investigating Different Mirror Geometry by Namvar, Behzad, Uusitalo, Topi, Virtanen, Heikki, Guina, Mircea, Viheriala, Jukka

“…The use of vertical-cavity-surface-emitting lasers with ability to operate at cryogenic temperatures (Cryo-VCSELs) is a promising path to implement optical…”
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Reconfigurable Vacuum Sample Holder for Through-Silicon Microscopy and Laser-Assisted Bonding by Vlasov, Aleksandr Andreevich, Uusitalo, Topi, Virtanen, Heikki, Viheriala, Jukka, Guina, Mircea

“…Current development trends concerning miniaturizing of electronics and photonics systems are aiming at assembly and 3D co-integration of a broad range of…”
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High power (60 mW) GaSb-based 1.9 μm superluminescent diode with cavity suppression element by Zia, Nouman, Viheriälä, Jukka, Koskinen, Riku, Aho, Antti, Suomalainen, Soile, Guina, Mircea

“…The characteristics and the fabrication of a 1.9 μm superluminescent diode utilizing a cavity suppression element are reported. The strong suppression of…”
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GaSb superluminescent diodes with broadband emission at 2.55 μm by Zia, Nouman, Viheriälä, Jukka, Koivusalo, Eero, Virtanen, Heikki, Aho, Antti, Suomalainen, Soile, Guina, Mircea

“…We report the development of superluminescent diodes (SLDs) emitting mW-level output power in a broad spectrum centered at a wavelength of 2.55 μm. The…”
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Low loss GaInNAs/GaAs gain waveguides with U-bend geometry for single-facet coupling in hybrid photonic integration by Tuorila, Heidi, Viheriälä, Jukka, Cherchi, Matteo, Aho, Antti T., Aalto, Timo, Guina, Mircea

“…We report a low loss U-bend waveguide for realization of GaAs-based gain elements employed in hybrid photonic integration. This architecture allows us to…”
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Widely Tunable (2.47–2.64 µm) Hybrid Laser Based on GaSb/GaInAsSb Quantum‐Wells and a Low‐Loss Si3N4 Photonic Integrated Circuit by Ojanen, Samu‐Pekka, Viheriälä, Jukka, Zia, Nouman, Koivusalo, Eero, Hilska, Joonas, Tuorila, Heidi, Guina, Mircea

“…Photonic integrated circuits fabricated using a Si3N4 waveguide platform exhibit low losses in a wide wavelength region extending from visible to beyond 2 µm…”
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Discretely Tunable (2594, 2629, 2670 nm) GaSb/Si3N4 Hybrid Laser for Multiwavelength Spectroscopy by Ojanen, Samu‐Pekka, Viheriälä, Jukka, Zia, Nouman, Koivusalo, Eero, Hilska, Joonas, Tuorila, Heidi, Guina, Mircea

“…A discrete, tunable photonic integrated laser is showcased for multiwavelength spectroscopy of CO2, H2S, and H2O. The laser combines an AlGaInAsSb/GaSb type‐I…”
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Dual-mode DFB laser diodes with apodized surface gratings by Uusitalo, Topi, Virtanen, Heikki, Viheriälä, Jukka, Dumitrescu, Mihail

“…Dual longitudinal mode distributed feedback lasers have been fabricated using surface gratings with and without apodization. Analytic formulas and simulations…”
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High-power temperature-stable GaInNAs distributed Bragg reflector laser emitting at 1180  nm by Korpijärvi, Ville-Markus, Viheriälä, Jukka, Koskinen, Mervi, Aho, Antti T, Guina, Mircea

“…We report a single-mode 1180 nm distributed Bragg reflector (DBR) laser diode with a high output power of 340 mW. For the fabrication, we employed novel…”
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High-Power 1180-nm GaInNAs DBR Laser Diodes by Aho, Antti T., Viheriala, Jukka, Korpijarvi, Ville-Markus, Koskinen, Mervi, Virtanen, Heikki, Christensen, Mathias, Uusitalo, Topi, Lahtonen, Kimmo, Valden, Mika, Guina, Mircea

“…We report high-power 1180-nm GaInNAs distributed Bragg reflector laser diodes with and without a tapered amplifying section. The untapered and tapered…”
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Data transmission at 1300 nm using optical interposer comprising hybrid integrated silicon waveguide and dilute nitride electroabsorption modulator by Sheehan, Robert N, Guina, Mircea, Viheriälä, Jukka, Isoaho, Riku, Harjanne, Mikko, Azarello, Francesco, Yang, Mingqi, Malacarne, Antonio, Aalto, Timo, Peters, Frank H

“…High speed back-to-back transmission of NRZ data at 12.5 Gbit/s was achieved over a repeaterless optical network without the use of forward error correction or…”
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Development of VCSELs for cyogenic (4.2 K) optical interfaces by Viheriala, Jukka, Uusitalo, Topi, Virtanen, Heikki, Namvar, Behzad, Rajala, Patrik, Ranta, Sanna, Hakkarainen, Teemu, Tukiainen, Antti, Almuneau, Guilhem, Guina, Mircea

“…Vertical cavity surface emitting lasers operating at 4.2K are developed for energy efficient optical links between cryogenic systems and room-temperature data…”
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Applications of UV-nanoimprint soft stamps in fabrication of single-frequency diode lasers by Viheriälä, Jukka, Tommila, Juha, Leinonen, Tomi, Dumitrescu, Mihail, Toikkanen, Lauri, Niemi, Tapio, Pessa, Markus

“…We show how to use a modified poly-dimethyl-siloxane (PDMS) soft stamp to reduce pattern deformation and residual layer thickness in soft UV-nanoimprint…”
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Bringing High-Performance GaInNAsSb/GaAs SOAs to True Data Applications by Giannoulis, Giannis, Korpijarvi, Ville-Markus, Iliadis, Nikos, Makela, Jaakko, Viheriala, Jukka, Apostolopoulos, Dimitrios, Guina, Mircea, Avramopoulos, Hercules

“…We experimentally demonstrate the high-speed data processing capabilities of a GaInNAsSb semiconductor optical amplifier operating at 1.55 μm. The investigated…”
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Photoconductivity of thin organic films by TKACHENKO, Nikolai V, CHUKHAREV, Vladimir, KAPLAS, Petra, TOLKKI, Antti, EFIMOV, Alexander, HARING, Kimmo, VIHERIÄLÄ, Jukka, NIEMI, Tapio, LEMMETYINEN, Helge

“…Thin organic films were deposited on silicon oxide surfaces with golden interdigitated electrodes (interelectrode gap was 2I14m), and the film resistivities…”
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Optical modeling of laterally-corrugated ridge-waveguide gratings by Laakso, Antti, Dumitrescu, Mihail, Viheriälä, Jukka, Karinen, Jukka, Suominen, Mikko, Pessa, Markus

“…The paper presents some model improvements for the optical simulation of laterally-corrugated ridge-waveguide distributed feedback lasers. Simulation results…”
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Inhomogeneities in the nonlinear tensorial responses of arrays of gold nanodots by Canfield, Brian K, Husu, Hannu, Kontio, Juha, Viheriälä, Jukka, Rytkönen, Tuomo, Niemi, Tapio, Chandler, Eric, Hrin, Alex, Squier, Jeff A, Kauranen, Martti

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Narrow-Linewidth 780-nm DFB Lasers Fabricated Using Nanoimprint Lithography by Virtanen, Heikki, Uusitalo, Topi, Karjalainen, Maija, Ranta, Sanna, Viheriala, Jukka, Dumitrescu, Mihail

“…This letter presents narrow-linewidth 780-nm edge-emitting semiconductor DFB lasers fabricated without re-growth using UV-nanoimprinted surface gratings. The…”
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