Results 261 to 270 of about 170,298 (303)
Highly sensitive fiber random-grating-based random laser sensor for ultrasound detection
Optics Letters, 2017 A novel highly sensitive ultrasound sensor based on a random fiber laser is proposed and demonstrated for the first time, to the best of our knowledge. The random fiber laser is constructed with the erbium-doped fiber gain.
Yanping Xu +2 more
exaly +2 more sources
Colloidal quantum dot random laser
Optics Express, 2011 We report random laser action in a system where optical amplification is provided by colloidal quantum dots (CQDs). This system is obtained by depositing from solution CdSe/ZnS core-shell CQDs into rough micron-scale grooves fabricated on the surface of ...
Yujie Chen +2 more
exaly +2 more sources
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Dissolvable and Recyclable Random Lasers
ACS Nano, 2017An integrated random laser based on green materials with dissolubility and recyclability is created and demonstrated. The dissolvable and recyclable random laser (DRRL) can be dissolved in water, accompanying the decay of emission intensity and the increment in lasing threshold.
Xiaoyu Shi +10 more
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Lasers with Random Stack Mirrors
Applied Optics, 1970The behavior of Q-switched, free-running, and mode-locked laser oscillators, with one cavity mirror consisting of a stack of thin glass plates, is described. The beam divergence can equal that obtained with a thin film coated dielectric mirror, but intensity and spatial coherence vary over the beam cross section.
G, Magyar, A C, Seiden
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2022
One essential component of a laser is the cavity, which provides optical confinement and feedback for lasing oscillation. In a highly disordered medium, light experiences multiple scattering and undergoes a random walk. Surprisingly, lasing can occur in a random system without well-defined cavities.
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One essential component of a laser is the cavity, which provides optical confinement and feedback for lasing oscillation. In a highly disordered medium, light experiences multiple scattering and undergoes a random walk. Surprisingly, lasing can occur in a random system without well-defined cavities.
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The physics and applications of random lasers
Nature Physics, 2008Recent developments in the field of micro and nanophotonics have shown that it is possible to make use of the intrinsic disorder in photonic materials to create useful optical structures. An example is that of a random laser, in which laser action is obtained in disordered structures such as powders and porous glasses. Although these materials are easy
Wiersma, DS
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A curvature-tunable random laser
Nanoscale, 2019We report the first experimental demonstration of curvature-tunable random lasers to control the transport mean free path of emitted photons.
Ya-Ju Lee +6 more
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THEORY OF A RANDOM FIBER LASER
Журнал Экспериментальной и Теоретической Физики, 2014We develop the theory explaining the role of nonlinearity in generation of radiation in a fiber laser that is pumped by external light. The pumping energy is converted into the generating signal due to the Raman scattering supplying an effective gain for the signal.
I. V. Kolokolov +3 more
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PARTIALLY PUMPED RANDOM LASERS
International Journal of Modern Physics B, 2014Conventional lasers consist of two components: a gain material that is pumped in order to provide amplification of light and a cavity to provide feedback. Random lasers replace the traditional laser cavity with a random, multiple-scattering medium. This can give rise to complex lasing behavior, such as unpredictable multidirectional and multifrequency
Andreasen, Jonathan +5 more
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Physical Review Letters, 2002
We present an analytical approach to random lasing in a one-dimensional medium, consistent with transfer matrix numerical simulations. It is demonstrated that the lasing threshold is defined by transmission through the passive medium and thus depends exponentially on the size of the system.
A L, Burin +3 more
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We present an analytical approach to random lasing in a one-dimensional medium, consistent with transfer matrix numerical simulations. It is demonstrated that the lasing threshold is defined by transmission through the passive medium and thus depends exponentially on the size of the system.
A L, Burin +3 more
openaire +2 more sources