Results 91 to 100 of about 2,414 (173)

Broadband amplitude squeezing in a periodically poled KTiOPO_4 waveguide

, 2008
We generated -2.2 dB of broadband amplitude squeezing at 1064 nm in a periodically poled KTiOPO_4 (PPKTP) waveguide, by coupling of the fundamental and second harmonic continuous-wave fields.
Anderson, Anderson, Bierlein, Bierlein, Braunstein, Christopher M. Kaleva, Eger, Eto, Fiorentino, Hall, Hänsch, Kanter, Kim, Laurat, Marangoni, Matthew Pysher, Menicucci, Olivier Pfister, Parameswaran, Philip Battle, Russell Bloomer, Serkland, Serkland, Takeno, Tony D. Roberts, Vahlbruch, Wang, Yoshino, Yuen, Yuen   +29 more
core   +1 more source

Enhancement of Photorefraction in Vanadium-Doped Lithium Niobate through Iron and Zirconium Co-Doping

Materials, 2019
A series of mono-, double-, and tri-doped LiNbO3 crystals with vanadium were grown by Czochralski method, and their photorefractive properties were investigated.
S. Saeed, Hongde Liu, L. Xue, Dahuai Zheng, Shiguo Liu, Shaolin Chen, Y. Kong, R. Rupp, Jingjun Xu   +8 more
semanticscholar   +1 more source

Dynamics of grating formation in photovoltaic media [PDF]

, 1991
The Kukhtarev equations are solved taking into account the photovoltaic effect and different boundary conditions. In the case of open circuit, the voltage across the crystal is found to vary with a time scale similar to the photorefractive time constant.
Gu, Claire, Hong, John, Li, Hsin-Yu, Psaltis, Demetri, Yeh, Pochi   +4 more
core  

Anisotropic focusing characteristics of micro-domain structures within crystalline Sr_0.61Ba_0.39Nb₂O₆ : the crystal ball

, 1997
We report the anisotropic focusing characteristics of a spherically configured region of micro-domains that have been induced within a cubic shaped crystal of Ce:doped Sr0.61Ba0.39Nb2O6.
Brown, Paul T., Daniell, Geoffrey J., Eason, Robert W., Ross, Graeme W., Smith, Peter G.R.   +4 more
core   +1 more source

Structural tunability in metamaterials

, 2009
We propose a novel approach for efficient tuning of the transmission characteristics of metamaterials through a continuous adjustment of the lattice structure, and confirm it experimentally in the microwave range.
Gorkunov, Maxim, Kivshar, Yuri, Lapine, Mikhail, Marqués, Ricardo, Powell, David, Shadrivov, Ilya   +5 more
core   +1 more source

The simultaneous enhancement of photorefraction and optical damage resistance in MgO and Bi2O3 co-doped LiNbO3 crystals

Scientific Reports, 2016
For a long time that optical damage was renamed as photorefraction, here we find that the optical damage resistance and photorefraction can be simultaneously enhanced in MgO and Bi2O3 co-doped LiNbO3 (LN:Bi,Mg). The photorefractive response time of LN:Bi,
Dahuai Zheng, Y. Kong, Shiguo Liu, Muling Chen, Shaolin Chen, Ling Zhang, R. Rupp, Jingjun Xu   +7 more
semanticscholar   +1 more source

Accommodation and pupil responses to random-dot stereograms

Journal of Optometry, 2016
We investigated the dynamics of accommodative and pupillary responses to random-dot stereograms presented in crossed and uncrossed disparity in six visually normal young adult subjects (mean age = 25.8 ± 3.1 years).
Rajaraman Suryakumar, Robert Allison
doaj   +1 more source

Direct generation of genuine single-longitudinal-mode narrowband photon pairs

, 2015
The practical prospect of quantum communication and information processing relies on sophisticated single photon pairs which feature controllable waveform, narrow spectrum, excellent purity, fiber compatibility and miniaturized design.
Brecht, Benjamin, Herrmann, Harald, Krapick, Stephan, Luo, Kai-Hong, Quiring, Viktor, Ricken, Raimund, Silberhorn, Christine, Sohler, Wolfgang, Suche, Hubertus   +8 more
core   +1 more source

Ocular screening tests of elementary school children [PDF]

This report presents an analysis of 507 abnormal retinal reflex images taken of Huntsville kindergarten and first grade students. The retinal reflex images were obtained by using an MSFC-developed Generated Retinal Reflex Image System (GRRIS ...
Richardson, J.
core   +1 more source

Improvement of the photorefractive response in bismuth and magnesium co-doped lithium niobate crystals via oxygen-vacancy modulation through controlled redox annealing

Frontiers in Physics
In this study, bismuth (Bi) and magnesium (Mg) co-doped lithium niobate crystals (LN:Bi,Mg6.0) with a rapid photorefractive (PR) response were subjected to annealing treatments in oxygen and various argon atmospheres to modulate their oxidation-reduction
Shuolin Wang, Weiwei Wang, Yuqi Zhang, Youyou Hu, Dahuai Zheng, Hongde Liu, Yongfa Kong   +6 more
doaj   +1 more source