Results 11 to 20 of about 1,352 (191)
Fully integrated electrically driven optical frequency comb at communication wavelength. [PDF]
Nanophotonics, 2022 Abstract To meet the high demand of data transmission capacity, optical communications systems have been developed. In order to increase the channel numbers for larger communication bandwidth, multi‐mode lasers and laser arrays can be used. As an alternative coherent light source, optical frequency comb (OFC) contains multi‐wavelength signal, and hence
Li N +6 more
europepmc +2 more sources
High-Q asymmetrically cladded silicon nitride 1D photonic crystals cavities and hybrid external cavity lasers for sensing in air and liquids. [PDF]
Nanophotonics, 2022 Abstract In this paper we show a novel design of high Q‐factor silicon nitride (SiN) 1D photonic crystal (PhC) cavities side‐coupled to curved waveguides, operating with both silica and air cladding. The engineering of the etched 1D PhC cavity sidewalls angle allows for high Q‐factors over a wide range of upper cladding compositions, and the ...
Iadanza S +8 more
europepmc +2 more sources
Responsiveness to left-prefrontal tDCS varies according to arousal levels. [PDF]
Eur J Neurosci, 2022 tDCS inconsistent findings may be due to the interplay between the level of induced cortical excitability and unaccounted state‐dependent functional factors. We aimed at verifying whether the behavioural effects induced by a common tDCS montage were influenced by the participants' arousal levels.
Esposito M +4 more
europepmc +2 more sources
Silicon Nitride External Cavity Laser With Alignment Tolerant Multi-Mode RSOA-to-PIC Interface [PDF]
IEEE Journal of Selected Topics in Quantum Electronics, 2021 We demonstrate an external cavity laser formed by combining a silicon nitride photonic integrated circuit with a reflective semiconductor optical amplifier. The laser uses an alignment tolerant edge coupler formed by a multi-mode waveguide splitter right
I. Ghannam +3 more
semanticscholar +1 more source
ANFIS-RSOA Approach for Detecting and Preventing Network Layer Attacks in MANET
International Journal of Computer Networks And Applications, 2023 – The primary obstacle typically encountered in Mobile Ad hoc Networks (MANETs) pertains for mitigating the impact of attacks prompted through malevolent nodes or identify promptly as well as addressing the certain nodes presence.
S. N, R. A., K. Archana
semanticscholar +1 more source
Discretely Tunable (2594, 2629, 2670 nm) GaSb/Si3N4 Hybrid Laser for Multiwavelength Spectroscopy
Laser &Photonics Reviews, Volume 17, Issue 12, December 2023., 2023 A discretely tunable GaSb/Si3N4 hybrid photonic integrated circuit (PIC) laser is introduced for multiwavelength spectroscopy of CO2, H2S, and H2O. It emits mW‐level power at 2670.42, 2629.12, and 2594.27 nm. Wavelength tuning and switching are based on a novel architecture employing cascaded Mach–Zehnder interferometers and a distributed Bragg, which ...
Samu‐Pekka Ojanen +6 more
wiley +1 more source
Laser &Photonics Reviews, Volume 17, Issue 7, July 2023., 2023 A miniaturized high‐performance integrated laser exhibiting broad wavelength tuneability near a 2.6 µm wavelength region is demonstrated. The laser consists of a Si3N4 photonic integrated circuit incorporating a tunable reflector and a AlGaInAsSb/GaSb quantum‐well gain element.
Samu‐Pekka Ojanen +6 more
wiley +1 more source
Distinctions in source regions and formation mechanisms of secondary aerosol in Beijing from summer to winter [PDF]
Atmospheric Chemistry and Physics, 2019 To investigate the sources and evolution of haze pollution in different seasons, long-term (from 15 August to 4 December 2015) variations in chemical composition of PM1 were characterized in Beijing, China.
J. Duan +34 more
doaj +1 more source
Photonics, 2022 Reflective Semiconductor Optical Amplifiers (RSOAs) are essential devices for the development of new generation networks that rely on the convergence of optical and RF communications.
Fokion N. Karadimoglou +3 more
doaj +1 more source
Chip‐based optical frequency combs for high‐capacity optical communications
Nanophotonics, Volume 10, Issue 5, Page 1367-1385, March 2021., 2021 Abstract Current fibre optic communication systems owe their high‐capacity abilities to the wavelength‐division multiplexing (WDM) technique, which combines data channels running on different wavelengths, and most often requires many individual lasers.
Hao Hu, Leif K. Oxenløwe
wiley +1 more source