Results 11 to 20 of about 160,768 (158)

Flexible Random Laser Using Silver Nanoflowers. [PDF]

Polymers (Basel), 2019
Tong J, Li S, Chen C, Fu Y, Cao F, Niu L, Zhai T, Zhang X.   +7 more
europepmc   +2 more sources

Perovskite Random Lasers, Process and Prospects

Micromachines, 2022
Random lasers (RLs) are a kind of coherent light source with optical feedback based on disorder-induced multiple scattering effects instead of a specific cavity. The unique feedback mechanism makes RLs different from conventional lasers.
Lei Wang, Mingqing Yang, Shiyu Zhang, Chunhui Niu, Yong Lv   +4 more
doaj   +1 more source

Random Laser Based on Ytterbium-Doped Fiber with a Bragg Grating Array as the Source of Continuous-Wave 976 nm Wavelength Radiation

Photonics, 2022
A random narrow-linewidth lasing at a wavelength of 976 nm was obtained in an ytterbium-doped germanophosphosilicate fiber with an array of weakly reflecting fiber Bragg gratings (FBGs). A random laser cavity was formed by implementing the standard phase
Andrey Rybaltovsky, Sergei Popov, Dmitry Ryakhovskiy, Alexey Abramov, Andrey Umnikov, Oleg Medvedkov, Viktor Voloshin, Alexander Kolosovskii, Igor Vorob’ev, Yuriy Chamorovskiy, Denis Lipatov   +10 more
doaj   +1 more source

Modes of random lasers [PDF]

Advances in Optics and Photonics, 2010
In conventional lasers, the optical cavity that confines the photons also determines essential characteristics of the lasing modes such as wavelength, emission pattern, ... In random lasers, which do not have mirrors or a well-defined cavity, light is confined within the gain medium by means of multiple scattering.
Andreasen J., Asatryan A. A., Botten L. C., Byrne M. A., Cao H., Ge L., Labonte L., Sebbah P., Stone A. D., Tureci H. E., Vanneste C.   +10 more
openaire   +2 more sources

Transition from amplified spontaneous emission to laser action in disordered media of R6G dye and TiO2 nanoparticles doped with PMMA polymer [PDF]

Journal of the European Optical Society-Rapid Publications, 2011
A random laser (RL) based on organic Rhodamine 6G (R6G) laser-dye and TiO2 suspended nanoparticles have been prepared with poly-methylmethacrylate (PMMA) as a host.
Chiad Baha. T., Hameed Mohammed. A., Latif Kamil H., AL-Maliki Firas J.   +3 more
doaj   +1 more source

Angular Spectra Tunable Random Lasing for High Contrast Imaging

Advanced Physics Research, 2023
Random lasers with low spatial coherence have important potential applications in speckle‐free imaging and displaying. Here, an angular spectra (AS) tunable random laser is proposed through directly coupling a microcavity with a commercial optical fiber.
Huihui Shen, Hongyu Yuan, Yaoxing Bian, Junyan Li, Weinian Liu, Hanyi Xue, Zhaona Wang   +6 more
doaj   +1 more source

Photosensitive Yb-Doped Germanophosphosilicate Artificial Rayleigh Fibers as a Base of Random Lasers

Fibers, 2021
Asingle-mode Yb-doped germanophosphosilicate fiber with ultra-low optical losses (less than 2 dB/km) was fabricated by means of the MCVD method utilizing an all-gas-phase deposition technique developed “in house”.
Andrey Rybaltovsky, Sergei Popov, Denis Lipatov, Andrey Umnikov, Alexey Abramov, Oleg Morozov, Dmitry Ryakhovskiy, Viktor Voloshin, Alexander Kolosovskii, Igor Vorob’ev, Oleg Butov, Yuriy Chamorovskiy   +11 more
doaj   +1 more source

A glassy model for random lasers [PDF]

Philosophical Magazine, 2007
We report oil a recent model introduced to describe the behaviour Of light in a nonlinear active random medium, i.e., laser. The emitted radiation is described by I disordered mean-field Hamiltonian for the phases of the complex amplitudes of the electromagnetic field modes. Using the replica trick the thermodynamics can be exactly solved.
L. ANGELANI, CONTI, CLAUDIO, RUOCCO, Giancarlo, F. ZAMPONI   +3 more
openaire   +5 more sources

External Electric Field Tailored Spatial Coherence of Random Lasing

Crystals, 2022
In this study, spatial coherence tunable random lasing is proposed by designing a random laser with separate coupling configuration between the gain medium and the scattering part.
Yaoxing Bian, Hongyu Yuan, Junying Zhao, Dahe Liu, Wenping Gong, Zhaona Wang   +5 more
doaj   +1 more source

Coherent instabilities in random lasers [PDF]

Physical Review A, 2011
A numerical study is presented of random lasers as a function of the pumping rate above the threshold for lasing. Depending on the leakiness of the system resonances, which is typically larger in random lasers compared to conventional lasers, we observe that the stationary lasing regime becomes unstable above a second threshold.
Andreasen, Jonathan, Sebbah, Patrick, Vanneste, Christian   +2 more
openaire   +2 more sources