Results 31 to 40 of about 4,960 (272)
TiO2-SiO2 Nanocomposite Saturable Absorber for Ultrafast Photonics
IEEE Photonics Journal, 2023 A tapered microfiber decorated with titanium dioxide-silicon dioxide nanocomposite saturable absorber (TiO2-SiO2-SA) is demonstrated via alkali fusion method and spin-coating technique.
Norita Mohd Yusoff +5 more
doaj +1 more source
Generation and Quenching of Intensity Pulsations in Semiconductor Lasers Coupled to External Cavities [PDF]
, 1980 The behavior of self-pulsing and nonpulsing lasers coupled to external cavities is investigated experimentally and theoretically. We investigate the dependence of the pulsation characteristics on the external cavity length using a saturable absorber ...
Figueroa, Luis +2 more
core +1 more source
Slow light in saturable absorbers [PDF]
Physical Review A, 2008 In connection with the experiments recently achieved on doped crystals, biological samples, doped optical fibers and semiconductor heterostructures, we revisit the theory of the propagation of a pulse-modulated light in a saturable absorber. Explicit analytical expressions of the transmitted pulse are obtained, enabling us to determine the parameters ...
Macke, Bruno, Ségard, Bernard
openaire +2 more sources
Q-Switched Operation with Carbon-Based Saturable Absorbers in a Nd:YLF Laser
Applied Sciences, 2015 We have numerically studied the influence of the absorption modulation depth of carbon-based saturable absorbers (graphene and carbon nanotubes (CNTs)) on the Q-switched regime of a diode-pumped Nd:YLF laser.
Rosa Weigand +2 more
doaj +1 more source
Low-loss flake-graphene saturable absorber mirror for laser mode-locking at sub-200-fs pulse duration [PDF]
, 2011 Saturable absorbers are a key component for mode-locking femtosecond lasers. Polymer films containing graphene flakes have recently been used in transmission as laser mode-lockers, but suffer from high nonsaturable loss, limiting their application in low-
B. V. Cunning +3 more
core +2 more sources
Passively Q-Switched Er:LuAG Laser at 1.65 μm Using MoS2 and WS2 Saturable Absorbers
IEEE Photonics Journal, 2017 We describe passively Q-switched Er:LuAG laser characteristics at 1.65 μm for the first time, with MoS2 and WS2 as the saturable absorber, respectively. The saturable absorbers were both prepared with the liquid phase exfoliation method.
Shuaiyi Zhang +10 more
doaj +1 more source
Self-Pulsating Semiconductor Lasers: Theory and Experiment [PDF]
, 1999 We report detailed measurements of the pump-current dependency of the self-pulsating frequency of semiconductor CD lasers. A distinct kink in this dependence is found and explained using rate-equation model. The kink denotes a transition between a region
Elsasser, W. +9 more
core +6 more sources
Graphene saturable absorbers for VECSELs [PDF]
SPIE Proceedings, 2014 We report mode-locking of an optically pumped VECSEL using a graphene-based saturable absorber mirror (GSAM). Self-starting and stable modelocked operation is demonstrated with 473 fs pulses at 1.5 GHz repetition rate and 949 nm center wavelength. Wavelength tuning is achieved over a 46 nm bandwidth. We discuss the mirror design, the fabrication of the
V. J. Wittwer +12 more
openaire +1 more source
Low-loss saturable absorbers based on tapered fibers embedded in carbon nanotube/polymer composites
APL Photonics, 2017 The emergence of low-dimensional materials has opened new opportunities in the fabrication of compact nonlinear photonic devices. Single-walled carbon nanotubes were among the first of those materials to attract the attention of the photonics community ...
Amos Martinez +8 more
doaj +1 more source
Modeling of mode-locking in a laser with spatially separate gain media [PDF]
, 2010 We present a novel laser mode-locking scheme and discuss its unusual properties and feasibility using a theoretical model. A large set of single-frequency continuous-wave lasers oscillate by amplification in spatially separated gain media.
Aschwanden +22 more
core +11 more sources