Results 61 to 70 of about 46,573 (328)

Assembly of Cell‐Seeded 3D Printed Hydrogel Modules with Perfusable Channel Networks

open access: yesAdvanced Functional Materials, EarlyView.
Macroscale assembly was utilized to prepare perfusable tissue constructs from individually 3D printed hydrogel modules with embedded branched channel networks and port arrays for cell seeding. Novel multi‐material bioreactors were fabricated to facilitate the gluing of individual modules and the perfusion culture of assembled modular constructs seeded ...
Zachary J. Geffert   +10 more
wiley   +1 more source

Ultrafast Fiber Lasers with Low-Dimensional Saturable Absorbers: Status and Prospects

open access: yesSensors, 2021
Wide-spectral saturable absorption (SA) in low-dimensional (LD) nanomaterials such as zero-, one-, and two-dimensional materials has been proven experimentally with outstanding results, including low saturation intensity, deep modulation depth, and fast ...
Pulak Chandra Debnath, Dong-Il Yeom
doaj   +1 more source

Spectral Sidebands and Multi-Pulse Formation in Passively Mode Locked Lasers

open access: yes, 2011
Pulse formation in passively mode locked lasers is often accompanied with dispersive waves that form of spectral sidebands due to spatial inhomogoneities in the laser cavity.
Bekker, Alexander   +4 more
core   +1 more source

Nonlinear beam self-cleaning in a coupled cavity composite laser based on multimode fiber [PDF]

open access: yes, 2014
We study a coupled cavity laser configuration where a passively Q-switched Nd:YAG microchip laser is combined with an extended cavity, including a doped multimode fiber.
Aaltonen, T   +401 more
core   +7 more sources

Mode-locked Nd-doped microstructured fiber laser

open access: yesOptics Express, 2004
We demonstrate passive mode-locking of a microstructured fiber laser for the first time. The Nd-doped microstructured fiber exhibits a reduced dispersion at 1060 nm. A semiconductor saturable absorber mirror is used for passive mode-locking. Stable pulse formation with a pulse duration of about 26 ps and a pulse energy of 0.7 nJ is observed.
Mathias, Moenster   +3 more
openaire   +2 more sources

Light‐Actuated Fiber‐Climbing Inchworm Robot Toward Endoluminal Navigation

open access: yesAdvanced Functional Materials, EarlyView.
A kirigami‐inspired soft inchworm robot harnesses optical energy from a customized side‐emitting optical fiber, guaranteeing its propulsion along the fiber body. The wavelength‐selective responsiveness of dye‐functionalized liquid crystal elastomers and the application of temporal illumination patterns enable sequential control of robot components. The
Antonio Lobosco   +6 more
wiley   +1 more source

Optical vortex fiber laser based on modulation of transverse modes in two mode fiber

open access: yesAPL Photonics, 2019
Optical vortices, characterized by helical phase fronts, are usually generated outside the laser cavity using passive modulation methods. Here, we demonstrate an all-fiber laser to directly deliver mode-locked and continuous-wave vortex beams based on ...
Dong Mao   +7 more
doaj   +1 more source

Automatic Generation of Noise-Like or Mode-Locked Pulses in an Ytterbium-Doped Fiber Laser by Using Two-Photon-Induced Current for Feedback

open access: yesIEEE Photonics Journal, 2018
We present a simple, reliable, and fast method to automatically generate noise-like or mode-locked pulses in a fiber laser. To generate the targeted pulses, we employed two-photon-induced current from a photocell as the feedback signal to control a set ...
Hsiao-Hua Wu   +5 more
doaj   +1 more source

High-Order Mode Mode-Locked Fiber Laser Based on Few-Mode Saturable Absorber

open access: yesIEEE Photonics Journal, 2021
We presented two kinds of high-order mode (HOM) mode-locked fiber lasers based on few-mode (FM) saturable absorbers for direct HOM oscillation. One is a ring fiber laser based on a carbon nanotube (CNT) saturable absorber (SA), in which the combination ...
Yi Huang   +6 more
doaj   +1 more source

Synchronized Time-Lens Source for Coherent Raman Scattering Microscopy [PDF]

open access: yes, 2013
We use the time-lens concept to demonstrate a new scheme for synchronization of two pulsed light sources for biological imaging. An all fiber, 1064 nm time-lens source is synchronized to a picosecond solid-state Ti: Sapphire mode-locked laser by using ...
Freudiger, Christian Wilhelm   +5 more
core   +1 more source

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