Results 11 to 20 of about 36,998 (231)

Ultrasound-Assisted Aqueous Extraction of Chlorogenic Acid and Cynarin with the Impact of Inulin from Burdock (Arctium lappa L.) Roots

open access: yesAntioxidants, 2022
The ultrasound-assisted aqueous extraction of chlorogenic acid (CGA) and cynarin with the impact of inulin from burdock (Arctium lappa L.) roots was investigated.
Yuan Chen, Jing-Yi Su, Chun-Yao Yang
doaj   +1 more source

EFFECTS OF GRADING LAYERS ON GaAs VERTICAL CAVITY SURVACE EMITTING LASER PERFORMANCE [PDF]

open access: yesKirkuk Journal of Science, 2016
This study is an attempt to investigate the effect of grading layers thicknesses and doping on the distributed Bragg reflectors (DBRs) resistivity by using advanced numerical simulation (ISETCAD) .
Ashty M. Aaref, Farah Z. Jasim
doaj   +1 more source

Spectroscopic applications and frequency locking of THz photomixing with distributed-Bragg-reflector diode lasers in low-temperature-grown GaAs [PDF]

open access: yes, 1997
A compact, narrow-linewidth, tunable source of THz radiation has been developed for spectroscopy and other high-resolution applications. Distributed-Bragg-reflector (DBR) diode lasers at 850 nm are used to pump a low-temperature-grown GaAs photomixer ...
Blake, Geoffrey A.   +7 more
core   +1 more source

Incidence of Design-Based Research Methodology in Science Education Articles: A Bibliometric Analysis

open access: yesRevista Brasileira de Pesquisa em Educação em Ciências, 2021
The design-based research (DBR) methodology has been standing out in the field of educational research promising to adapt to different scenarios and boost the development of educational innovations.
Luciana Natália Cividatti   +2 more
doaj   +1 more source

Quasi-2D lead halide perovskite gain materials toward electrical pumping laser

open access: yesNanophotonics, 2021
Quasi two-dimensional (2D) lead halide perovskite materials have shown outstanding performance in various photoelectric devices, including perovskite light-emitting diodes (LEDs) and perovskite optical pumping lasers.
Zhao Chenyang, Qin Chuanjiang
doaj   +1 more source

Fast tuneable InGaAsP DBR laser using quantum-confined stark-effect-induced refractive index change [PDF]

open access: yes, 2007
We report a monolithically integrated InGaAsP DBR ridge waveguide laser that uses the quantum-confined Stark effect (QCSE) to achieve fast tuning response.
Cannard, P   +5 more
core   +1 more source

ADMINISTRATIVE AND LEGAL BASIS OF THE PARTICIPATION OF THE DBR IN INFORMA- TION RELATIONS [PDF]

open access: yesAlfred Nobel University Journal of Law
The article examines the administrative and legal foundations of the participation of the State Bureau of Investigation (SBI) in Ukraine’s informational relations, with a focus on contemporary challenges and development prospects for this institution ...
Oleksandr М. Moskalyk
doaj   +1 more source

Ultrashort Q-switched pulses from a passively mode-locked distributed Bragg reflector semiconductor laser [PDF]

open access: yes, 2012
A compact semiconductor mode-locked laser (MLL) is presented that demonstrates strong passive Q-switched mode-locking over a wide range of drive conditions.
Cheung   +12 more
core   +1 more source

Optical Tamm state theory study on asymmetric DBR-metal-DBR structure

open access: yesActa Physica Sinica, 2013
As a special metal surface state, optical Tamm state (OTS) has been widely used in designing the new generation of optical devices for its unique advantages in light control and operation. Based on distribute Bragg reflector (DBR)-metal-DBR (DMD)structure, asymmetric mechanism is introduced by mismatching central frequencies of the two DBRs to design ...
null Jiang Yao   +2 more
openaire   +1 more source

A Comparison of Top Distributed Bragg Reflector for 1300 nm Vertical Cavity Semiconductor Optical Amplifiers Based on III–V Compound

open access: yesARO-The Scientific Journal of Koya University, 2021
In this work, the design of GaAs/AlGaAs distributed Bragg reflector (DBR) has been implemented for 1300 nm vertical cavity semiconductor optical amplifiers (VCSOAs) for optical fiber communication applications. The top DBR period and Al concentration are
Shawbo A. Abubaker
doaj   +1 more source

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