Results 41 to 50 of about 638,812 (341)
IEEE Access, 2022 We propose and demonstrate a stable single-longitudinal mode (SLM) thulium-doped fiber laser (TDFL) with a Fabry- Pérot (F-P) fiber Bragg grating (FBG) filter and a triple-coupler based double-ring cavity (TC-DRC) filter.
Ting Li +9 more
doaj +1 more source
Second Harmonic Generation Enabled by Longitudinal Electric Field Components in Photonic Wire Waveguides [PDF]
, 2020 We investigate type I second harmonic generation in III-V semiconductor wire waveguides aligned with a crystallographic axis. In this direction, because of the single nonzero tensor element of III-V semiconductors, only frequency conversion by mixing ...
Alexander, Koen +12 more
core +3 more sources
Photonics, 2023 This paper proposes and demonstrates a single-longitudinal-mode thulium-doped fiber laser using a passive triple-coupler ring-based compound-cavity filter (TCR-CC) and a uniform fiber Bragg grating. For the first time, the TCR-CC filter is used to select
Biao Guan +8 more
doaj +1 more source
Upconversion of optical signals with multi-longitudinal-mode pump lasers
, 2012 Multi-longitudinal-mode lasers have been believed to be good candidates as pump sources for optical frequency conversion. However, we present a semi-classical model for frequency conversion of optical signals with a multimode pump laser, which shows that
G.-L. Shentu +6 more
core +1 more source
Short cavity InGaAsP/InP lasers with dielectric mirrors [PDF]
, 1983 Short cavity length (38 µm) lasers have been fabricated using a recently developed microcleavage technique. SiO2-amorphous Si multilayer coatings have been evaported on the lasers to obtain high reflectivity mirrors. The lasers have current thresholds as
Chen, T. R. +7 more
core +1 more source
IEEE Access, 2023 A stable and tunable parity-time (PT) symmetric single-longitudinal-mode fiber laser using a nonreciprocal Sagnac loop is proposed, which is experimentally and numerically demonstrated. The nonreciprocal Sagnac loop only including a 3-dB optical coupler (
Liuyuan Tao +3 more
doaj +1 more source
Development of Single-Longitudinal-Mode Selection Technology for Solid-State Lasers
International Journal of Optics, 2021 Lasers with narrow linewidths and single frequencies are widely used in fields such as radar detection, nonlinear optics, and precision measurements.
Xuanpu Zhang +7 more
doaj +1 more source
Electron-vibron coupling in suspended nanotubes
, 2005 We consider the electron-vibron coupling in suspended nanotube quantum dots. Modelling the tube as an elastic medium, we study the possible coupling mechanism for exciting the stretching mode in a single-electron-transistor setup.
Flensberg, Karsten
core +1 more source
Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system
FEBS Letters, EarlyView.Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley +1 more source
Compact Multiwavelength Brillouin Fiber Laser by Utilizing EDF as Hybrid Gain Media
IEEE Photonics Journal, 2015 We have experimentally demonstrated a compact multiwavelength Brillouin fiber laser by introducing an optical feedback mechanism in the laser configuration.
Heng Xie +3 more
doaj +1 more source