Numerical Investigations of Laser Diode End-pumped Solid-state Cr\(^{3+}\):LiSAF Lasers Passively Q-switched with Cr\(^{4+}\):YSO Crystal

We have numerically investigated, for the first time, the optical performance and characteristics of diode-end-pumped passively Cr\(^{4+}\):YSO Q-switched solid-state Cr\(^{3 + }\):LiSAF lasers using a rate equation system extended to multi-wavelength. Homogeneously broadened emission spectra of the laser crystal and broad absorption spectra of Cr\(^{4+}\):YSO saturable absorber have been respected in the investigation. A tunable passively Q-switched laser operation is also developed with a birefringent filter plate used as an intracavity selective element. As a result, improved understanding of passively Q-switched Cr\(^{4+}\):YSO solid-state Cr\(^{3+}\):LiSAF lasers has been obtained in broadband and tunable laser operations. Characteristics of the tunable passively Q-switched Cr\(^{3 + }\):LiSAF laser were demonstrated to be clearly dependent on wavelength. The spectro-temporal evolution of a single pulse emitted from the passively Q-switched Cr\(^{3 + }\):LiSAF laser has been reported.

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ALL-SOLID-STATE SUBNANOSECOND TUNABLE ULTRAVIOLET LASER SOURCES BASED ON Ce3+-ACTIVATED FLUORIDE CRYSTALS

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863599000047 ◽

1999 ◽

Vol 08 (01) ◽

pp. 41-54 ◽

Cited By ~ 8

Author(s):

ZHENLIN LIU ◽

NOBUHIKO SARUKURA ◽

MARK A. DUBINSKII ◽

R. YU. ABDULSABIROV ◽

S. L. KORABLEVA

Keyword(s):

Solid State ◽

Nd:Yag Laser ◽

Tuning Range ◽

Tunable Laser ◽

Single Pulse ◽

Laser Output ◽

Maximum Output ◽

Sum Frequency ◽

Laser Sources ◽

Pulse Output

Several practical all-solid-state tunable ultraviolet subnanosecond laser sources have been developed based on Ce 3+: LiLuF 4 (Ce:LLF) and Ce 3+: LiCaAlF 6 (Ce:LiCAF) active media pumped by the fifth and fourth harmonics of a regular Q-switched 10-ns Nd:YAG laser, respectively. The demonstrated tuning range of the Ce:LiCAF oscillator providing reproducibly-single-pulse output was 282 nm to 314 nm with the maximum output energy of 1 mJ. Tunable laser output from 223 nm to 232 nm was obtained by sum-frequency-mixing Ce:LiCAF laser output with fundamental output of a Q-sw Nd:YAG laser. The maximum subnanosecond Ce:LiCAF single-pulse output of 14 mJ was obtained in a "master oscillator-power amplifier" (MOPA) configuration.

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Ultra-broad absorption band of Dy3+ doped Gd3Sc2Al3O12 garnet crystal at around 450nm: A potential crystal for InGaN LD pumped all-solid-state yellow lasers

CrystEngComm ◽

10.1039/d1ce00596k ◽

2021 ◽

Author(s):

Shoujun Ding ◽

Hao Ren ◽

Hongyuan Li ◽

Wenpeng Liu ◽

Qingli Zhang ◽

...

Keyword(s):

Solid State ◽

Absorption Band ◽

Single Crystal ◽

Czochralski Method ◽

Spectroscopic Properties ◽

Garnet Crystal ◽

High Quality ◽

Broad Absorption ◽

Broad Absorption Band ◽

First Time

In this work, a high-quality 2at% Dy3+ doped Gd3Sc2Al3O12 (Dy:GSAG) single crystal was grown successfully by the Czochralski method for the first time. Spectroscopic properties of the crystal were investigated...

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Ti2CTx MXene as a Saturable Absorber for Passively Q-Switched Solid-State Lasers

Polymers ◽

10.3390/polym13020247 ◽

2021 ◽

Vol 13 (2) ◽

pp. 247

Author(s):

Hongfu Huang ◽

Jianwen Wang ◽

Ning Xu ◽

Shunxiang Liu ◽

Guowen Liang ◽

...

Keyword(s):

Solid State ◽

Saturable Absorber ◽

Single Pulse ◽

Solid State Laser ◽

Pulse Generation ◽

Solid State Lasers ◽

Single Pulse Energy ◽

Coating Method ◽

Diode Pumped ◽

First Time

In this work, we successfully fabricated a transmissive saturable absorber (SA) with Ti2CTx MXene using the spin-coating method. By inserting the Ti2CTx saturable absorber into the diode-pumped solid-state (DPSS) Nd:YAG laser, a stable passively Q-switched operation was obtained near 1.06 μm. At a pump power of 4.5 W, we obtained the shortest pulse duration of 163 ns with a repetition rate of 260 kHz. The corresponding single pulse energy and peak pulse power were 3.638 μJ and 22.3 W, respectively. The slope efficiency and the optical conversion efficiency of the laser were 21% and 25.5%, respectively. To the best of our knowledge, this is the first time that Ti2CTx was used in the passively Q-switched solid-state lasers. This work demonstrates that Ti2CTx can be a promising saturable absorber for solid-state laser pulse generation.

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Growth, thermal properties and laser performance of Er,Pr:Y2.8Sc1Al4.2O12: a promising multi-wavelength laser crystal

Applied Physics A ◽

10.1007/s00339-021-04663-x ◽

2021 ◽

Vol 127 (7) ◽

Author(s):

Zhenzhen Ma ◽

Yuanzhi Chen ◽

Yi He ◽

Qingli Zhang ◽

Jiayue Xu ◽

...

Keyword(s):

Thermal Properties ◽

Laser Crystal ◽

Laser Performance ◽

Multi Wavelength

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Ionized AGN outflows are less powerful than assumed: A multi-wavelength census of outflows in type II AGN

Proceedings of the International Astronomical Union ◽

10.1017/s1743921320002975 ◽

2019 ◽

Vol 15 (S356) ◽

pp. 225-225

Author(s):

Dalya Baron

Keyword(s):

Optical Emission ◽

Infrared Emission ◽

Type Ii ◽

Ionized Gas ◽

Kinetic Coupling ◽

Mass Outflow ◽

Multi Wavelength ◽

Novel Method ◽

First Time ◽

Ionization Parameter

AbstractIn this talk I will show that multi-wavelength observations can provide novel constraints on the properties of ionized gas outflows in AGN. I will present evidence that the infrared emission in active galaxies includes a contribution from dust which is mixed with the outflow and is heated by the AGN. We detect this infrared component in thousands of AGN for the first time, and use it to constrain the outflow location. By combining this with optical emission lines, we constrain the mass outflow rates and energetics in a sample of 234 type II AGN, the largest such sample to date. The key ingredient of our new outflow measurements is a novel method to estimate the electron density using the ionization parameter and location of the flow. The inferred electron densities, ∼104.5 cm−3, are two orders of magnitude larger than found in most other cases of ionized outflows. We argue that the discrepancy is due to the fact that the commonly-used [SII]-based method underestimates the true density by a large factor. As a result, the inferred mass outflow rates and kinetic coupling efficiencies are 1–2 orders of magnitude lower than previous estimates, and 3–4 orders of magnitude lower than the typical requirement in hydrodynamic cosmological simulations. These results have significant implications for the relative importance of ionized outflows feedback in this population.

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Bis(1-phenyl-1-propyne) complexes of tungsten(II): crystal structures of [WI2(CO)(NCR)(η2-MeC2Ph)2] (R = Me, Et, or Ph)

Canadian Journal of Chemistry ◽

10.1139/v01-028 ◽

2001 ◽

Vol 79 (3) ◽

pp. 263-271

Author(s):

Paul K Baker ◽

Michael GB Drew ◽

Deborah S Evans

Keyword(s):

Carbon Monoxide ◽

Solid State ◽

Crystal Structures ◽

Octahedral Geometry ◽

X Ray ◽

X Ray Crystallography ◽

Alkyne Complexes ◽

First Time

Reaction of [WI2(CO)3(NCMe)2] with two equivalents of 1-phenyl-1-propyne (MeC2Ph) in CH2Cl2, and in the absence of light, gave the bis(1-phenyl-1-propyne) complex [WI2(CO)(NCMe)(η2-MeC2Ph)2] (1) in 77% yield. Treatment of equimolar quantities of 1 and NCR (R = Et, i-Pr, t-Bu, Ph) in CH2Cl2 afforded the nitrile-exchanged products, [WI2(CO)(NCR)(η2-MeC2Ph)2] (2-5) (R = Et (2), i-Pr (3), t-Bu (4), Ph (5)). Complexes 1, 2, and 5 were structurally characterized by X-ray crystallography. All three structures have the same pseudo-octahedral geometry, with the equatorial sites being occupied by cis and parallel alkyne groups, which are trans to the cis-iodo groups. The trans carbon monoxide and acetonitrile ligands occupy the axial sites. In structures 1 and 2, the methyl and phenyl substituents of the 1-phenyl-1-propyne ligands are cis to each other, whereas for the bulkier NCPh complex (5), the methyl and phenyl groups are trans to one another. This is the first time that this arrangement has been observed in the solid state in bis(alkyne) complexes of this type.Key words: bis(1-phenyl-1-propyne), carbonyl, nitrile, diiodo, tungsten(II), crystal structures.

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ELECTRON STRUCTURE INVESTIGATIONS OF InGaP/GaAs(100) HETEROSTRUCTURES WITH InP QUANTUM DOTS

International Journal of Nanoscience ◽

10.1142/s0219581x07004468 ◽

2007 ◽

Vol 06 (03n04) ◽

pp. 215-219

Author(s):

E. P. DOMASHEVSKAYA ◽

V. A. TEREKHOV ◽

V. M. KASHKAROV ◽

S. YU. TURISHCHEV ◽

S. L. MOLODTSOV ◽

...

Keyword(s):

Quantum Dots ◽

Emission Spectra ◽

Luminescence Spectra ◽

Partial Density ◽

Edge Structure ◽

X Ray ◽

Metal Organic ◽

Structure Investigations ◽

First Time ◽

Inp Quantum Dots

Ultrasoft X-ray emission spectra (USXES) and X-ray absorption near-edge structure (XANES) spectra with the use of synchrotron radiation in the range of P L2,3-edges were obtained for the first time for nanostructures with InP quantum dots grown on GaAs 〈100〉 substrates by vapor-phase epitaxy from metal–organic compounds. These spectra represent local partial density of states in the valence and conduction bands. The additional XANES peak is detected; its intensity depends on the number of monolayers forming quantum dots. Assumptions are made on the band-to-band origin of luminescence spectra in the studied nanostructures.

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Preparation and Luminescence Property of LaMgAl11O19

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.519.224 ◽

2012 ◽

Vol 519 ◽

pp. 224-227 ◽

Cited By ~ 2

Author(s):

Xin Min ◽

Ming Hao Fang ◽

Yan Gai Liu ◽

Zhao Hui Huang

Keyword(s):

Solid State ◽

Luminescence Property ◽

Broad Band ◽

Emission Spectra ◽

Synthesis Temperature ◽

Solid State Lasers ◽

Broad Band Emission ◽

Band Emission ◽

Air Atmosphere ◽

Fluorescent Lamps

Lanthanum magnesium hexaaluminate (LaMgAl11O19, LMA) has attracted much interest as its widely used in solid state lasers, TV phosphors and fluorescent lamps. In this paper, LaMgAl11O19 ceramic was pressureless sintered at 1650 °C for 10 h in air atmosphere using LaMgAl11O19 powders prepared by solid-state reaction at 1500 °C for 4 h. The result indicated that the synthesis temperature of LaMgAl11O19 powders was about 1500 °C. The LMA ceramic sample was dense and had a microstructure of platelet-like gains. The excitation spectrum shows two wide bands with the peaks at about 254 nm and 265 nm by monitoring the strongest 362 nm emission, and the emission spectra is consisted of a broad band emission with their peaks near 362 nm with a half-width about 5 nm exciting with 265 nm wavelength.

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Gold(I) Complexes Bearing P∩N-Ligands: An Unprecedented Twelve-membered Ring Structure Stabilized by Aurophilic Interactions

Zeitschrift für Naturforschung B ◽

10.1515/znb-2009-11-1235 ◽

2009 ◽

Vol 64 (11-12) ◽

pp. 1513-1524 ◽

Cited By ~ 19

Author(s):

Uwe Monkowius ◽

Manfred Zabel ◽

Michel Fleck ◽

Hartmut Yersin

Keyword(s):

Solid State ◽

Ring Structure ◽

Phosphine Ligands ◽

X Ray Crystallography ◽

Aggregation Pattern ◽

Elemental Analyses ◽

High Yields ◽

First Time ◽

Solid State Structures ◽

Aurophilic Interactions

The P∩N-ligands Ph2Pqn, 1, Ph2 Piqn, 2, Ph2 Ppym, 3, and the As∩N-ligands Ph2Asqn, 4, Ph2Asiqn, 5, (Ph = phenyl, qn = 8-quinoline, iqn = 1-isoquinoline, pym = 2-pyrimidine) have been synthesized, the ligands 2 and 5 for the first time. Their ligand properties were probed by the synthesis of gold(I) complexes. Reaction with (tht)AuCl (tht = tetrahydrothiophene) yielded the chlorogold complexes Ph2RP-Au-Cl (R = qn, 6; iqn, 7; pym, 8) and Ph2RAs-Au-Cl (R = qn, 9; iqn, 10) in high yields. Further treatment of 7 and 8 with one equivalent of AgBF4 provided the complexes [(Ph2Piqn)Au]BF4, 11, [(Ph2Ppym)Au]BF4, 12, and [(Ph2Piqn)Au(tht)]BF4, 14. For comparison, the previously reported complex [(Ph2Ppy)Au]BF4 (py = pyridine), 13, was re-investigated. The compounds were characterized by elemental analyses, mass spectrometry and NMR spectroscopy. In addition, the solid-state structures of 2, 3, 6, 7, 9 - 14 have been determined by X-ray crystallography. The chloro-gold compounds crystallize in the common rod-like structure known from R3EAuCl (R = aryl, E = P, As) complexes without further aggregation via aurophilic interactions. In all cases the phosphine acts as a monodentate ligand. In the solid state compounds 11 - 13 feature an unprecedented cyclic trinuclear aggregation pattern, in which the Au(I) atoms are linearly coordinated by the bridging phosphine ligands forming a cyclic (P-Au-N)3 arrangement. The resulting twelvemembered ring is further stabilized by Au · · · Au interactions. Due to the presence of these Au · · · Au contacts, 11 - 13 are emissive in the solid state but not in solution

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