Results 11 to 20 of about 220,832 (286)

Re-analysis of single-mode conditions for thin-film lithium niobate rib waveguides

open access: yesResults in Physics, 2021
Single-mode waveguide devices are necessary in photonic integrated circuits. Previous studies on the single-mode conditions (SMCs) of the thin film lithium niobate (TFLN) either only focus on wire waveguide, or lack comprehensive discussions on the ...
Ying Li   +3 more
doaj   +1 more source

Coexisting periodic attractors in injection locked diode lasers [PDF]

open access: yes, 1997
We present experimental evidence for coexisting periodic attractors in a semiconductor laser subject to external optical injection. The coexisting attractors appear after the semiconductor laser has undergone a Hopf bifurcation from the locked steady ...
A Gavrielides   +14 more
core   +2 more sources

Research of selective etching in LiNbO3 using proton-exchanged wet etching technique

open access: yesMaterials Research Express, 2020
Lithium niobate material (LN) has shown great application potentials in the fabrication of integrated optical devices due to its excellent physical properties, especially with the occurrence of lithium niobate-on-insulator (LNOI) substrate.
Ying Li   +6 more
doaj   +1 more source

Dispersion-induced dynamics of coupled modes in a semiconductor laser with saturable absorption [PDF]

open access: yes, 2014
We present an experimental and theoretical study of modal nonlinear dynamics in a specially designed dual-mode semiconductor Fabry-Perot laser with a saturable absorber.
O'Brien, Stephen   +2 more
core   +2 more sources

A dual-grating InGaAsP/InP DFB laser integrated with an SOA for THz generation [PDF]

open access: yes, 2016
We report a dual-mode semiconductor laser that has two gratings with different periods below and above the active layer. A semiconductor optical amplifier (SOA), which is integrated with the dual-mode laser, plays an important role in balancing the ...
Deng, Qiufang   +5 more
core   +1 more source

Effect of carrier confinement on effective mass of excitons and estimation of ultralow disorder in Al x Ga1−x As/GaAs quantum wells by magneto-photoluminescence

open access: yesScientific Reports, 2017
Effect of charge carrier confinement and ultra-low disorder acquainted in AlGaAs/GaAs multi-quantum well system is investigated via Magneto-photoluminescence spectroscopy.
S. Haldar   +6 more
doaj   +1 more source

Improved Optical Property and Lasing of ZnO Nanowires by Ar Plasma Treatment

open access: yesNanoscale Research Letters, 2019
ZnO nanowires play a very important role in optoelectronic devices due to the wide bandgap and high exciton binding energy. However, for one-dimensional nanowire, due to the large surface to volume ratio, surface traps and surface adsorbed species acts ...
Haolin Li   +8 more
doaj   +1 more source

Continuous-wave Raman laser pumped within a semiconductor disk laser cavity [PDF]

open access: yes, 2011
A KGd(WO4)(2) Raman laser was pumped within the cavity of a cw diode-pumped InGaAs semiconductor disk laser (SDL). The Raman laser threshold was reached for 5: 6W of absorbed diode pump power, and output power up to 0.8W at 1143nm, with optical ...
Alan J. Kemp   +21 more
core   +1 more source

Hot Carrier Photocurrent through MOS Structure

open access: yesApplied Sciences, 2021
Flow of photocurrent through the metal-oxide-semiconductor structure induced by the pulsed infrared CO2 laser is investigated experimentally. In the case of a perfect insulator, the photocurrent has a photocapacitive character.
Jonas Gradauskas, Steponas Ašmontas
doaj   +1 more source

Thermal photon statistics in laser light above threshold [PDF]

open access: yes, 1999
We show that the reduction in photon number fluctuations at laser threshold often cited as a fundamental laser property does not occur in typical semiconductor lasers such as the ones commonly used in modern technological applications today. Indeed, such
Hess, Ortwin, Hofmann, Holger F.
core   +2 more sources

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