Results 41 to 50 of about 241,915 (134)

Volterra-assisted Optical Phase Conjugation: a Hybrid Optical-Digital Scheme For Fiber Nonlinearity Compensation [PDF]

open access: yes, 2018
Mitigation of optical fiber nonlinearity is an active research field in the area of optical communications, due to the resulting marked improvement in transmission performance.
Bayvel, Polina   +2 more
core   +2 more sources

Photonic chip based optical frequency comb using soliton induced Cherenkov radiation

open access: yes, 2015
By continuous wave pumping of a dispersion engineered, planar silicon nitride microresonator, continuously circulating, sub-30fs short temporal dissipative solitons are generated, that correspond to pulses of 6 optical cycles and constitute a coherent ...
Brasch, Victor   +6 more
core   +1 more source

Caching Gain in Wireless Networks with Fading: A Multi-User Diversity Perspective

open access: yes, 2013
We consider the effect of caching in wireless networks where fading is the dominant channel effect. First, we propose a one-hop transmission strategy for cache-enabled wireless networks, which is based on exploiting multi-user diversity gain.
Khalaj, Babak Hossein   +2 more
core   +1 more source

Design and simulation of 1.28 Tbps dense wavelength division multiplex system suitable for long haul backbone [PDF]

open access: yes, 2018
Wavelength division multiplex (WDM) system with on / off keying (OOK) modulation and direct detection (DD) is generally simple to implement, less expensive and energy efficient. The determination of the possible design capacity limit, in terms of the bit
Amusan, Akinwumi, Amusan, Elizabeth
core   +1 more source

European Union Acts project MIDAS: objectives and progress to date

open access: yes, 1997
Introduction to the ACTS program: Advanced Communications and Technology and Services, known simply as ACTS, is one of the specific programmes of the "Fourth Framework Programme of European Community activities in the field of research and technological ...
Richardson, D.J.
core  

Towards More Precise Survey Photometry for PanSTARRS and LSST: Measuring Directly the Optical Transmission Spectrum of the Atmosphere

open access: yes, 2007
Motivated by the recognition that variation in the optical transmission of the atmosphere is probably the main limitation to the precision of ground-based CCD measurements of celestial fluxes, we review the physical processes that attenuate the passage ...
Benjamin R. Granett   +20 more
core   +2 more sources

Long-term stability of fibre-optic transmission for multi-object spectroscopy

open access: yes, 2012
We present an analysis of the long-term stability of fibre-optic transmission properties for fibre optics in astronomy. Data from six years of operation of the AAOmega multi-object spectrograph at the Anglo-Australian Telescope is presented.
Brough, S., Cannon, R. D., Sharp, R.
core   +1 more source

Distributed User Scheduling for MIMO-Y Channel

open access: yes, 2015
In this paper, distributed user scheduling schemes are proposed for the multi-user MIMO-Y channel, where three $N_{T}$-antenna users ($N_{T}=2N,\,3N$) are selected from three clusters to exchange information via an $N_{R}$-antenna amplify-and-forward (AF)
Gao, Hui   +4 more
core   +1 more source

Experimental investigation on the dynamic characteristics and transverse vibration instabilities of transmission belts [PDF]

open access: yes, 2008
Serpentine belt drives are often used in front end accessory drive of automotive engine. Dynamic characteristics of belts play an important role in the behavior of such transmission and are inputs of simulation software. Moreover, free belt spans exhibit
Besson, François   +3 more
core  

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