Results 41 to 50 of about 31,377 (306)

Effect of Pump Beam Shape on Thermal and Stress Distribution within the Laser Crystal in Diode Pumped Solid-State Lasers

Syrian Journal for Science and Innovation
Thermal effects formed in a solid-state laser crystal, which cause the appearance of thermal lensing، mechanical stress and birefringence, lead to laser beam distortion and shorten the lifetime of laser crystal، and hinder getting a high-quality laser ...
I. Hasan Sulieman, M. Sayem El-daher
doaj   +1 more source

5 kW Near-Diffraction-Limited and 8 kW High-Brightness Monolithic Continuous Wave Fiber Lasers Directly Pumped by Laser Diodes

IEEE Photonics Journal, 2017
Tandem pumping technique are traditionally adopted to develop >3-kW continuous-wave (cw) Yb3+-doped fiber lasers, which are usually pumped by other fiber lasers at shorter wavelengths (1018 nm e.g.,).
Qiang Fang, Jinhui Li, Wei Shi, Yuguo Qin, Yang Xu, Xiangjie Meng, Robert A. Norwood, Nasser Peyghambarian   +7 more
doaj   +1 more source

Bio‐Orthogonally Crosslinked Supramolecular Polymer Bottlebrush Hydrogels for Long‐Term 3D Cell Culture

Advanced Functional Materials, EarlyView.
Fibrous benzenetrispeptide (BTP) hydrogels, fabricated via strain‐promoted azide‐alkyne cycloaddition (SPAAC) crosslinking, form robust, bioinert networks. These hydrogels can support 3D cell culture, where cell viability and colony growth depend on the fiber content.
Ceren C. Pihlamagi, David Pretzel, Peer Nölte, Kourosh Rezaei, Ulrich S. Schubert, Johannes C. Brendel   +5 more
wiley   +1 more source

Investigation on efficiency declines due to spectral overlap between LDAs pump and laser medium in high power double face pumped slab laser

Results in Physics, 2018
In high power diode lasers, the input cooling water temperature would affect both output power and output spectrum. In double face pumped slab laser, the spectrum of two laser diode arrays (LDAs) must be optimized for efficiency reason.
Ye Lang, Yanzhong Chen, Lifen Liao, Guangyan Guo, Jianguo He, Zhongwei Fan   +5 more
doaj   +1 more source

Orange emission in Pr3+-doped fluoroindate glasses [PDF]

, 2012
We synthesize and study the properties of praseodymium doped fluoroindate glasses. Glass compositions with praseodymium molar concentrations up to 5% were obtained with good optical quality. Thermal, optical, and luminescence properties are investigated.
Adam, Adam, Balda, Bernier, Danilo Manzani, David Pabœuf, de Melo, Dietzel, Fabien Bretenaker, Florez, Goldner, Goldner, Hedges, Inoue, Judd, Kaminskii, Kazuyuki, Longdell, Longdell, Mazurak, Messaddeq, Moorty, My, Nazabal, Ofelt, Olivier, Pabœuf, Peacock, Philippe Goldner, Poulain, Quimby, Ratnakaram, Rippe, Sharma, Sidney J.L. Ribeiro, Wei, Yang   +36 more
core   +2 more sources

Quasi‐Static to Supersonic Energy Absorption of Nanoarchitected Tubulanes and Schwarzites

Advanced Functional Materials, EarlyView.
Nanoarchitected energy‐absorptive Tubulanes exhibit record energy absorption under quasi‐static conditions and exceptional inelastic energy dissipation under 750 m s−1 ballistics impact, with high performance spanning strain rates of 12 orders of magnitude.
Peter Serles, Alianna Maguire, Thomas Butruille, Jet Lem, Shuo Yang, Pedro Guerra Demingos, Sahar Choukir, Michel Haché, Boran Kumral, Katherine Jia, Charles Jia, Yu Zou, Chandra Veer Singh, Carlos M. Portela, Jun Lou, Pulickel M. Ajayan, Tobin Filleter   +16 more
wiley   +1 more source

Uncovering the Origin of Efficiency Roll‐Off in TADF OLEDs

Advanced Functional Materials, EarlyView.
OLEDs based on thermally activated delayed fluorescent (TADF) materials often suffer from a severe drop in efficiency at high brightness levels. This work presents a technique to uncover the source of this efficiency drop, and quantifies the exciton‐exciton and exciton‐polaron annihilation processes responsible for efficiency losses in our TADF OLEDs ...
Liam G. King, Kou Yoshida, Arvydas Ruseckas, Ifor D. W. Samuel   +3 more
wiley   +1 more source

InGaN-LD-Pumped ${\rm Pr}^{3+}$: ${\rm LiYF}_{4}$ Continuous-Wave Laser at 915 nm

IEEE Photonics Journal, 2014
We demonstrate the first InGaN-LD-pumped room temperature and continuous-wave laser operation of a Pr3+: LiYF4 crystal at 915 nm. A maximum output power up to 78 mW with a laser slope efficiency of about 17% is obtained. The round-trip optical losses are
Biao Qu, Bin Xu, Yongjie Cheng, Saiyu Luo, Huiying Xu, Yikun Bu, Patrice Camy, Jean-Louis Doualan, Richard Moncorge, Zhiping Cai   +9 more
doaj   +1 more source

Eye-Safe Solid-State Quasi-CW Raman Laser with Millisecond Pulse Duration

, 2012
We demonstrate the first quasi-CW (ms-long pulses, pump duty cycle of 10%) end-diode pumped solid state laser generating eye-safe radiation via intracavity Raman conversion. The output power at the first Stokes wavelength (1524 nm) was 250 mW.
Agnesi, Anton A. Kananovich, Apanasevich, Apanasevich, Bermudez, Boyd, Cerný, Chen, Dekker, Dekker, Demidovich, Di Lieto, Dmitriy H. Zusin, Fan, Grabchikov, Grabtchikov, Grasjuk, Innocenzi, Kaminskii, Kananovich, Kananovich, Lee, Lee, Lisinetskii, Ogilvy, Omatsu, Pask, Pask, Pask, Pavel, Pavel A. Apanasevich, Sato, Tidwell, Valentin A. Orlovich, Vladimir I. Dashkevich, Weber, Yao, Zagumennyi   +37 more
core   +1 more source

Operation of an optical in-well-pumped vertical-external-cavity surface-emitting laser [PDF]

, 2006
We report the operation of an optical in-well-pumped vertical-external-cavity surface-emitting laser. The laser delivers 1 W at 855 nm and is pumped with a cost-effective fiber-coupled laser diode emitting at 806 nm.
Abram, Alford, Beyertt, Bohn, Bradley, Chang, Chilla, Giesen, Haering, Hastie, Holm, Kemp, Knopp, Kurosu, Kuznetsov, Liau, Raja, Salomon, Schmid, Schmid   +19 more
core   +1 more source