Results 31 to 40 of about 1,991 (215)
Nanophotonics, 2023 A light source with narrowband, sufficient brightness, and low spatial coherence is required for certain applications such as optical imaging and free-space optical communication.
Wan Yuan +6 more
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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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Direct Measurement of the Reduced Scattering Coefficient by a Calibrated Random Laser Sensor
Sensors, 2022 The research in optical sensors has been largely encouraged by the demand for low-cost and less or non-invasive new detection strategies. The invention of the random laser has opened a new frontier in optics, providing also the opportunity to explore new
Federico Tommasi +4 more
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Photonics, 2023 We studied the properties of ultra-narrow spectral modes, appearing in random distributed feedback Raman fiber lasers, for different fibers building up a laser cavity.
Ilya D. Vatnik +2 more
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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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Wavelength-switchable L-band fiber laser assisted by ultrafast laser fabricated random reflectors [PDF]
EPJ Web of Conferences, 2022 A wavelength-switchable L-band erbium-doped fiber laser (EDFL) assisted by an artificially controlled backscattering (ACB) fiber reflector is here presented.
Perez-Herrera Rosa Ana +5 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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Tunable replica symmetry breaking in random laser
Nanophotonics, 2023 Replica symmetry breaking (RSB) has been widely recognized as a statistical analysis approach to understand the disorder and nonlinear interactions in complex systems ranging from atoms to the cosmic scale.
Xia Jiangying +11 more
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Tunable Random Fiber Laser Based on Dual-Grating Structure
Photonics, 2023 In order to reduce the pumping threshold and achieve a short-cavity single-mode transmission with a narrow-linewidth random fiber laser, we propose a tunable random fiber laser based on the combination of random grating and highly reflective fiber Bragg ...
Yanan Niu +6 more
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Broadband plasmonic silver nanoflowers for high-performance random lasing covering visible region
Nanophotonics, 2017 Multicolor random lasing has broad potential applications in the fields of imaging, sensing, and optoelectronics. Here, silver nanoflowers (Ag NF) with abundant nanogaps are fabricated by a rapid one-step solution-phase synthesis method and are first ...
Chang Qing +5 more
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