Results 41 to 50 of about 23,920 (290)

Visible-wavelength pulsed lasers with low-dimensional saturable absorbers

Nanophotonics, 2020
The recent renaissance in pulsed lasers operating in the visible spectral region has been driven by their significant applications in a wide range of fields such as display technology, medicine, microscopy, material processing, and scientific research ...
Zou Jinhai, Ruan Qiujun, Zhang Xiaojin, Xu Bin, Cai Zhiping, Luo Zhengqian   +5 more
doaj   +1 more source

Quantification of nonlinear absorption in ternary As-Sb-Se chalcogenide glasses

, 2018
In this article, we studied intensity dependent third order nonlinear optical response in ternary As40Sb7Se53 and As40Sb10Se50 chalcogenide glasses by employing nanosecond Z-scan technique.
Adarsh, K. V., Aswin, J. R., Das, N., Khan, Pritam, Naik, R., Panda, A. K., Pradhan, P.   +6 more
core   +1 more source

Passively Q-switched 2.79-μm Er, Cr: YSGG laser based on pure water saturable absorber

Frontiers in Physics
Exploring suitable saturable absorber materials for the 2.79 μm waveband is always a focus in passive Q-switching laser technology. Pure water exhibits excellent fluidity, high chemical stability, and outstanding thermal properties; notably, its recovery
Yinze Wang, Yinze Wang, Lei Huang, Lei Huang, Haolin Kong, Yueyun Zhang, Tingqing Cheng, Li Wang, Li Wang, Haihe Jiang, Haihe Jiang   +10 more
doaj   +1 more source

Graphene mode locked, wavelength-tunable, dissipative soliton fiber laser

, 2010
Atomic layer graphene possesses wavelength-insensitive ultrafast saturable absorption, which can be exploited as a full-band mode locker. Taking advantage of the wide band saturable absorption of the graphene, we demonstrate experimentally that wide ...
Bao, Qiaoliang, Knize, R. J., Loh, Kian Ping, Tang, Dingyuan, Zhang, Han, Zhao, Luming   +5 more
core   +1 more source

Semiconductor saturable absorbers for ultrafast THz signals [PDF]

, 2010
We demonstrate saturable absorber behavior of n-type semiconductors GaAs, GaP and Ge in THz frequency range at room temperature using nonlinear THz spectroscopy.
Conwell E. M., Dmitry Turchinovich, Matthias C. Hoffmann   +2 more
core   +4 more sources

Saturated absorption competition microscopy

Optica, 2017
We introduce the concept of saturated absorption competition (SAC) microscopy as a means of providing sub-diffraction spatial resolution in fluorescence imaging. Unlike the post-competition process between stimulated and spontaneous emission that is used in stimulated emission depletion (STED) microscopy, SAC microscopy breaks the diffraction limit by ...
Zhao, Guangyuan, Kabir, Mohammad M, Toussaint Jr., Kimani C., Kuang, Cuifang, Zheng, Cheng, Yu, Zhongzhi, Liu, Xu   +6 more
openaire   +2 more sources

Saturable absorption in multicore fiber couplers [PDF]

Journal of the Optical Society of America B, 2013
The saturable absorption characteristics of two-, three-, and five-core one-dimensional fiber coupler arrays and the seven-core hexagonal fiber coupler array are investigated. It is shown that the performance of all these saturable absorbers are comparable and not much is gained, if anything, by going from a two-core nonlinear coupler geometry to a ...
Nazemosadat, Elham, Mafi, Arash
openaire   +2 more sources

Intensity-Dependent Enhancement of Saturable Absorption in PbS-Au4 Nanohybrid Composites: Evidence for Resonant Energy Transfer by Auger Recombination

, 2008
Intensity-dependent enhancement of saturable absorption in a film of PbS-Au4 nanohybrid composites has been observed by femtosecond time-resolved transient absorption measurement at 780 nm.
Hendry I. Elim, Jian Yang, Jim Yang Lee, Shi W., Wei Ji   +4 more
core   +1 more source

Saturable Absorption by Vertically Inserted or Overlaid Monolayer Graphene in Optical Waveguide for All-Optical Switching Circuit

IEEE Photonics Journal, 2013
Optical saturable absorption through a monolayer graphene vertically inserted between fibers and overlaid on an ion-exchanged waveguide was measured for picosecond switching application.
M. Takahashi, W. Ueda, N. Goto, S. Yanagiya   +3 more
doaj   +1 more source

Multilayer black phosphorus as broadband saturable absorber for pulsed lasers from 1 to 2.7 {\mu}m wavelength

, 2015
It attracts wide interest to seek universe saturable absorber covering wavelengths from near infrared to mid-infrared band. Multilayer black phosphorus, with variable direct bandgap (0.3-2 eV) depending on the layer number, becomes a good alternative as ...
Guo, Zhinan, Kong, Lingchen, Qian, Liejia, Qin, Zhipeng, Xie, Guoqiang, Yuan, Peng, Zhang, Han   +6 more
core   +1 more source