Results 21 to 30 of about 21,293 (257)
Physical Review Letters, 2007 We investigate the effects of two dimensional confinement on the lasing properties of a classical random laser system operating in the incoherent feedback (diffusive) regime. A suspension of 250nm rutile (TiO2) particles in a Rhodamine 6G solution was inserted into the hollow core of a photonic crystal fiber (PCF) generating the first random fiber ...
de Matos, Christiano J. S. +5 more
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Optical materials for flexible and stretchable random lasers
Optical Materials: X, 2022 The development of photonic devices has been largely benefitted by the offer of new flexible and stretchable materials. Many innovative components and devices have been developed for light-based applications.
Anderson S.L. Gomes +4 more
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APL Photonics, 2020 Lasers based on Fabry–Pérot or whispering gallery resonators generally require complex fabrication stages and sensitive alignment of cavity configurations.
Itir Bakis Dogru-Yuksel +6 more
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Turbulent Intermittency in a Random Fiber Laser
Atoms, 2019 In fluid turbulence, intermittency is the emergence of non-Gaussian tails in the distribution of velocity increments in small space and/or time scales. Intermittence is thus expected to gradually disappear as one moves from small to large scales. Here we
Antônio M. S. Macêdo +4 more
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Optics Express, 2005 A microchip-type laser with multiple scattering from powder as necessary feedback is demonstrated. The laser consists of a transparent ceramic Nd:YAG microchip and a Nd:YAG powder tablet, operates at quasi-continuous- wave regime pumped by a laser diode array.
Yan, Feng +4 more
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Breakthroughs in Photonics 2014: Random Lasers
IEEE Photonics Journal, 2015 Multiple scattering of light in a disordered medium with gain may provide for the necessary feedback to achieve lasing action without an optical cavity.
P. Sebbah, R. Carminati
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Probability of Reflection by a Random Laser
Physical Review Letters, 1996 A theory is presented (and supported by numerical simulations) for phase-coherent reflection of light by a disordered medium which either absorbs or amplifies radiation. The distribution of reflection eigenvalues is shown to be the Laguerre ensemble of random-matrix theory. The statistical fluctuations of the albedo (the ratio of reflected and incident
Beenakker, C.W.J. +2 more
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Applied Sciences, 2019 Manipulation of the performance of the random lasers from dye-doped nematic liquid crystals with TiN nanoparticles in non-oriented cells is studied. The experimental results show that the introduction of TiN nanoparticles into dye-doped nematic liquid ...
Yuan Wan, Luogen Deng
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Speckle experiments in random lasers [PDF]
Physical Review E, 2002 We present measurements of speckle in a random laser. We analyze its first-order statistics and show that, contrary to what might be expected for passive systems, analyses of the intensity distribution P(I) and the speckle spot size do provide information about light transport inside the system. P(I) is used to determine the degree to which an incident
van Soest, G. +2 more
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A fractional diffusion random laser [PDF]
Scientific Reports, 2019 AbstractThe goal of this letter is to introduce the concept of a non-resonant fractional random laser. This is achieved by extending the classical Letokhov model of photon diffusion through disordered gain media to fractional differential operators in space and time.
Yuyao Chen +2 more
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