Coherent emission of a linear array of CO₂waveguide lasers with a spatial filter

Abstract

Results on two-particle angular correlations are presented in proton-proton collisions at center of mass energies of 7 TeV, over a broad range of pseudorapidity and azimuthal angle. In very high-multiplicity events at 7 TeV, a pronounced structure emerges in the two-dimensional correlation function for particle pairs with intermediate p T of 1-3 GeV/c, in the kinematic region 2.0 < | η| < 4.8 and small φ. This structure, which has not been observed in pp collisions before, is similar to what is known as the 'ridge' in heavy-ion collisions. It is not predicted by commonly used proton-proton Monte Carlo models and is not seen in lower multiplicity pp collisions. Updated studies of this new effect as a function of particle transverse momentum, rapidity and event characteristics are shown.

Solvable model of the collective motion of heterogeneous particles interacting on a sphere

“…Oscillation is a ubiquitous phenomenon found in systems such as these that consist of a large number of mutually interacting elements. Other examples of these systems include reaction-diffusion systems [4], electrochemical reactions [5], electronic circuits [6,7], spiking neurons [8], the human gait [9], flashing of fireflies [10], the female menstrual cycle [11], a linear array of CO 2 waveguide lasers [12] and Josephson-junction arrays [13]. Dynamics of oscillatory element i can be described by ẋi = χ i (x i ), where x i is the state vector and χ i (x i ) is the function defining the behaviour of element i.…”

“…neurons [8], the human gait [9], the flashing of fireflies [10], the female menstrual cycle [11], a linear array of CO 2 waveguide lasers [12] and Josephson-junction arrays [13]. The dynamics of an oscillatory element i can be described bẏ…”

Simple interpretation of the dynamics of mutually coupled semiconductor lasers with detuning

“…The nonlinear dynamics and synchronization of mutually coupled oscillators have important applications in fields ranging from the high-power laser arrays 4 to central issues in neuroscience. 5 In fact, synchronization was first discovered in two mutually coupled oscillators.…”

Nd:YVO4 disk laser with multipoint diode pumping and diffraction limited output

“…The coherent beam combination of solid-state lasers can provide a high-power output; together with a diffraction limited beam determined by the size of the laser channels entire aperture [1][2][3]. The most promising methods of lasing channels phase-locking are the self-phase locking methods without the use of additional phase monitoring and control elements [1,2,[4][5][6][7][8]. In this case, optical coupling between the lasing channels is realized and the lasing channels phases become interdependent (the super-mode lasing condition) [1,2].…”