Results 31 to 40 of about 1,917 (117)

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

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

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, Alfredo Fiorentino, Luca Dal Negro   +2 more
openaire   +2 more sources

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, Zhang Xiaojuan, Zhou Kaiming, Zhang Lin, Wang Erlei, Du Wenyu, Ma Jiajun, Li Siqi, Xie Kang, Yu Benli, Zhang Junxi, Hu Zhijia   +11 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

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

The controllable intensity and polarization degree of random laser from sheared dye-doped polymer-dispersed liquid crystal

Nanophotonics, 2017
The random laser from sheared dye-doped polymer-dispersed liquid crystal (DDPDLC) is investigated. As the emission intensity weakens, the threshold of random laser from DDPDLC increases from 2.0 mJ/pulse to 4.0 mJ/pulse, and the degree of polarization ...
Ye Lihua, Li Fangjie, Lu Changgui, Cheng Zhixiang, Hu Guohua, Lu Yanqing, Cui Yiping   +6 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

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

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, Shi Xiaoyu, Liu Xuan, Tong Junhua, Liu Dahe, Wang Zhaona   +5 more
doaj   +1 more source