Results 11 to 20 of about 1,917 (117)

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

A White Random Laser [PDF]

Scientific Reports, 2018
AbstractRandom laser with intrinsically uncomplicated fabrication processes, high spectral radiance, angle-free emission, and conformal onto freeform surfaces is in principle ideal for a variety of applications, ranging from lighting to identification systems. In this work, a white random laser (White-RL) with high-purity and high-stability is designed,
Shu-Wei Chang, Wei-Cheng Liao, Yu-Ming Liao, Hung-I Lin, Hsia-Yu Lin, Wei-Ju Lin, Shih-Yao Lin, Packiyaraj Perumal, Golam Haider, Chia-Tse Tai, Kun-Ching Shen, Cheng-Han Chang, Yuan-Fu Huang, Tai-Yuan Lin, Yang-Fang Chen   +14 more
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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
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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

Large-Area Biocompatible Random Laser for Wearable Applications

Nanomaterials, 2021
Recently, wearable sensor technology has drawn attention to many health-related appliances due to its varied existing optical, electrical, and mechanical applications.
Kun Ge, Dan Guo, Xiaojie Ma, Zhiyang Xu, Anwer Hayat, Songtao Li, Tianrui Zhai   +6 more
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1337 nm Emission of a Nd³⁺-Doped TZA Glass Random Laser

Nanomaterials, 2023
Random lasers have been studied using many materials, but only a couple have used glass matrices. Here, we present a study of zinc tellurite and aluminum oxide doped with different percentages of neodymium oxide (4 wt.%, 8 wt.%, and 16 wt.%) and ...
Jessica Dipold, Camila D. S. Bordon, Evellyn S. Magalhães, Luciana R. P. Kassab, Ernesto Jimenez-Villar, Niklaus U. Wetter   +5 more
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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