Results 31 to 40 of about 170,298 (303)

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., Paasschens, J.C.J., Brouwer, P.W.   +2 more
openaire   +5 more sources

Comparative Study of Ultra-Narrow-Mode Generation in Random Fiber Lasers Based on Different Fiber Types

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, Oleg A. Gorbunov, Dmitry V. Churkin   +2 more
doaj   +1 more source

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., Poelwijk, F.J., Lagendijk, A.   +2 more
openaire   +3 more sources

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, Roldan-Varona Pablo, Sanchez-Gonzalez Arturo, Rodriguez-Cobo Luis, Lopez-Higuera Jose Miguel, Lopez-Amo Manuel   +5 more
doaj   +1 more source

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, Pinggang Jia, Jianhui Su, Jingyi Wang, Guowen An, Qianyu Ren, Jijun Xiong   +6 more
doaj   +1 more source

Waveguided nematic liquid crystal random lasers

Nanophotonics, 2021
In waveguided nematic liquid crystal random lasers (NLCRLs), we realize polarized random laser (RL) emission and discover that the waveguide effect reduces the transmission loss of the RL whose polarization is parallel to the liquid crystal molecules ...
Huang Yunxi, Zhang Xiaojuan, Yu Benli, Ma Jiajun, Xie Kang, Cheng Sheng, Zhang Junxi, Hu Zhijia   +7 more
doaj   +1 more source

Triple-Wavelength Thulium-Doped Fiber Random Laser Based on Random Fiber Grating

Photonics, 2023
We demonstrate a triple-wavelength thulium-doped fiber random laser using a 10 cm long random fiber grating to provide random distributed feedback and a superimposed fiber Bragg grating as the wavelength-selective mirror.
Lewen Zhou, Yaozong Hu, Wenlong Zheng, Pengbai Xu, Zhensen Gao, Xinyong Dong   +5 more
doaj   +1 more source

Bi-chromaticity and tunability of random lasing in mesoporous silica SBA16 doped with rhodamine B

, 2022
The random laser emission from ordered mesoporous silica SBA16 doped with rhodamine B (RB) organic dye was investigated. Powdered SBA16 with 16 nm average pore diameter have been synthesized and doped with five different concentrations of the organic dye.
Vicente, Fábio S. de [UNESP], Rodrigues Jr, José Joatan, Moreno, Leandro X. [UNESP], Prado, Marcus V. A., Melo, Leandro A., Alencar, Márcio A. R. C.   +5 more
core   +1 more source

The Origin of Threshold Reduction in Random Lasers Based on MoS₂/Au NPs: Charge Transfer

Photonics
Random lasers have attracted much attention in recent years owing to their advantages of a simple fabrication process, low processing cost, and material flexibility for any lasing wavelengths.
Yanyan Huo, Ke Sun, Yuqian Zhang, Weihao Liu, Junkun Wang, Yuan Wan, Lina Zhao, Tingyin Ning, Zhen Li, Yingying Ren   +9 more
doaj   +1 more source

ZnO nanorod array random lasers fabricated by a laser-induced hydrothermal synthesis

New Journal of Physics, 2016
We demonstrate random lasing in ZnO nanorod array (NRA) structures fabricated by a laser-induced hydrothermal growth, which would make it possible to control structural parameters, such as diameter, length, density and so on, by adjusting the laser ...
Hideki Fujiwara, Takemasa Suzuki, Ryo Niyuki, Keiji Sasaki   +3 more
doaj   +1 more source