Results 41 to 50 of about 3,670,840 (396)

A Review of Self-Coherent Optical Transceivers: Fundamental Issues, Recent Advances, and Research Directions

Applied Sciences, 2021
This paper reviews recent progress on different high-speed optical short- and medium-reach transmission systems. Furthermore, a comprehensive tutorial on high-performance, low-cost, and advanced optical transceiver (TRx) paradigms is presented.
Isiaka Alimi, Romil Patel, Nuno Silva, Chuanbowen Sun, Honglin Ji, William Shieh, Armando Pinto, Nelson Muga   +7 more
doaj   +1 more source

Tuning of human modulation filters is carrier-frequency dependent [PDF]

, 2013
Recent studies employing speech stimuli to investigate 'cocktail-party' listening have focused on entrainment of cortical activity to modulations at syllabic (5 Hz) and phonemic (20 Hz) rates.
Reiss Joshua D., Reiss, JD, Simpson, AJ, Andrew J R Simpson, Simpson Andrew J. R., Joshua D. Reiss, Simpson, AJR, McAlpine, D, Joshua D Reiss, David McAlpine, Andrew J. R. Simpson, McAlpine David   +11 more
core   +1 more source

Comprehensive Analysis of Time-Domain Hybrid PAM for Data-Rate and Distance Adaptive UWOC System

IEEE Access, 2021
The challenge for next-generation underwater optical wireless communication systems is to develop optical transceivers that can operate with low power consumption by maximizing the transmission capacity according to the transmission distance between ...
Takahiro Kodama, Muhamad Aizat Bin Ahmad Sanusi, Fumiya Kobori, Tomotaka Kimura, Yoshiaki Inoue, Masahiko Jinno   +5 more
doaj   +1 more source

Ultra-Wide and Flattened Optical Frequency Comb Generation Based on Cascaded Phase Modulator and LiNbO3-MZM Offering Terahertz Bandwidth

IEEE Access, 2020
In this paper, a new technique for generation of ultra-wide and flattened optical frequency comb (OFC) based on serial cascading of a phase modulator and dual-driven Lithium-Niobate Mach Zehnder modulator (DD-LiNbO3-MZM) is proposed.
Sibghat Ullah, Rahat Ullah, Qi Zhang, Hafiz Ahmad Khalid, Kamran Ali Memon, Adil Khan, Feng Tian, Xin Xiangjun   +7 more
doaj   +1 more source

The Impact of Stimulation Intensity on Spatial Discrimination with Multi-Pad Finger Electrode

Applied Sciences, 2021
Multi-pad electrotactile stimulation can be used to provide tactile feedback in different applications. The electrotactile interface needs to be calibrated before each use, which entails adjusting the intensity to obtain clear sensations while allowing ...
Jovana Malešević, Milica Isaković, Martin A. Garenfeld, Strahinja Došen, Matija Štrbac   +4 more
doaj   +1 more source

Non‐linear modelling and distortion compensation in optical Fast‐orthogonal frequency division multiplexing systems

IET Optoelectronics, 2023
Fast‐OFDM‐based intensity‐modulation and direct‐detection (IM/DD) has been proposed for deployment of cost‐efficient optical access networks, due to its implementation simplicity and high spectral efficiency.
Luis Carlos Vieira, Waseem Ozan, John Mitchell, Izzat Darwazeh   +3 more
doaj   +1 more source

Signal Retrieval from Non-Sinusoidal Intensity Modulations in X-ray and Neutron Interferometry Using Piecewise-Defined Polynomial Function

Journal of Imaging, 2021
Grating-based phase-contrast and dark-field imaging systems create intensity modulations that are usually modeled with sinusoidal functions to extract transmission, differential-phase shift, and scatter information.
Simon Pinzek, Alex Gustschin, Tobias Neuwirth, Alexander Backs, Michael Schulz, Julia Herzen, Franz Pfeiffer   +6 more
doaj   +1 more source

Rotational modulation and local time dependence of Saturn's infrared H3+ auroral intensity [PDF]

, 2012
Planetary auroral emissions reveal the configuration of magnetospheric field-aligned current systems. In this study, Cassini Visual and Infrared Mapping Spectrometer (VIMS) observations of Saturn's pre-equinox infrared H3+ aurorae were analysed to show ...
Baines, K. H., Badman, S. V., Kimura, T., Baines, K., Tao, C., Lamy, L., Andrews, David J.,, Badman, S., Provan, G.,, Cowley, S., Tao, C.,, Kasahara, S., Andrews, D., Brown, R. H.,, Lamy, L.,, Brown, R., Kasahara, S.,, Cowley, S. W. H.,, Kimura, T.,, Stallard, T.,, Stallard, T., Provan, G., Fujimoto, M., Andrews, D. J., Melin, H.,, Melin, H., Badman, S. V.,, Brown, R. H., Baines, K. H.,, Cowley, S. W. H., Fujimoto, M.,   +30 more
core   +1 more source

Rate Analysis of Intensity Modulated Broadcast Optical Mobile Communication System With User Mobility

IEEE Photonics Journal, 2020
Optical mobile communication (OMC) provides a hopeful vision to handle with wireless communication scenarios where multiple mobile users are involved.
Jiajun Gao, Jian Dang, Zaichen Zhang, Liang Wu   +3 more
doaj   +1 more source

Optical direct intensity modulation of a 79GHz resonant tunneling diode-photodetector oscillator.

Optics Express, 2019
We report on the direct intensity modulation characteristics of a high-speed resonant tunneling diode-photodetector (RTD-PD) with an oscillation frequency of 79 GHz.
Weikang Zhang, S. Watson, J. Figueiredo, Jue Wang, H. Cantú, Joana S. Tavares, L. Pessoa, A. Al-Khalidi, H. Salgado, E. Wasige, A. Kelly   +10 more
semanticscholar   +1 more source