Tunable line width all solid state double spectral line sodium beacon laser

2017 ◽  
Author(s):  
Huaijin Ren ◽  
Bin Wei ◽  
Yuan Liao ◽  
Shenggang Gong ◽  
Tao Li ◽  
...  
Keyword(s):  
Solid State ◽  
Spectral Line ◽  
Line Width

scholarly journals Origin of the residual line width under frequency-switched Lee–Goldburg decoupling in MAS solid-state NMR

2020 ◽  
Vol 1 (1) ◽  
pp. 13-25 ◽  
Author(s):  
Johannes Hellwagner ◽  
Liam Grunwald ◽  
Manuel Ochsner ◽  
Daniel Zindel ◽  
Beat H. Meier ◽  
...  
Keyword(s):  
Solid State ◽  
Line Width ◽  
Floquet Theory ◽  
Pulse Sequence ◽  
Second Order ◽  
Magic Angle ◽  
Line Broadening ◽  
Third Order ◽  
Order Error ◽  
Error Terms

Abstract. Homonuclear decoupling sequences in solid-state nuclear magnetic resonance (NMR) under magic-angle spinning (MAS) show experimentally significantly larger residual line width than expected from Floquet theory to second order. We present an in-depth theoretical and experimental analysis of the origin of the residual line width under decoupling based on frequency-switched Lee–Goldburg (FSLG) sequences. We analyze the effect of experimental pulse-shape errors (e.g., pulse transients and B1-field inhomogeneities) and use a Floquet-theory-based description of higher-order error terms that arise from the interference between the MAS rotation and the pulse sequence. It is shown that the magnitude of the third-order auto term of a single homo- or heteronuclear coupled spin pair is important and leads to significant line broadening under FSLG decoupling. Furthermore, we show the dependence of these third-order error terms on the angle of the effective field with the B0 field. An analysis of second-order cross terms is presented that shows that the influence of three-spin terms is small since they are averaged by the pulse sequence. The importance of the inhomogeneity of the radio-frequency (rf) field is discussed and shown to be the main source of residual line broadening while pulse transients do not seem to play an important role. Experimentally, the influence of the combination of these error terms is shown by using restricted samples and pulse-transient compensation. The results show that all terms are additive but the major contribution to the residual line width comes from the rf-field inhomogeneity for the standard implementation of FSLG sequences, which is significant even for samples with a restricted volume.

Temperature dependence of the spectral line width for complex europium compounds in solutions

1986 ◽  
Vol 44 (2) ◽  
pp. 156-159
Author(s):  
N. N. Mit'kina ◽  
R. A. Puko ◽  
T. I. Razvina ◽  
V. V. Kuznetsova ◽  
M. R. Posledovich
Keyword(s):  
Spectral Line ◽  
Temperature Dependence ◽  
Line Width ◽  
Spectral Line Width

On the Theory of Spectral Line Widths of Coupled Many Wave Systems in Non-Thermal Equilibrium

1974 ◽  
Vol 29 (9) ◽  
pp. 1258-1266
Author(s):  
W. Wonneberger
Keyword(s):  
Spectral Line ◽  
Line Width ◽  
Thermal Equilibrium ◽  
Internal Noise ◽  
Single Mode ◽  
Energy Balance Equation ◽  
Turbulence Theory ◽  
Wave System ◽  
Mode Laser ◽  
Single Mode Laser

The problem of the natural spectral line width ⊿ω oi individual waves of a coupled many wave system in non-thermal equilibrium is discussed within the Fokker Planck approach to fluctuation phenomena. Edwards' method in turbulence theory is reinterpreted to relate ⊿ω via a modified energy balance equation to the spectrum of the mean wave intensities. This equation is solved for a model of the non-resonant feedback laser. ⊿ω is found to consist of two contributions: The first one is associated with the usual internal noise of a "free" Gaussian wave due to spontaneous emissions. Its contribution to the line width is twice that of a single mode laser far above threshold as found earlier by Brunner and Paul. The second and new contribution stems from the wave-wave coupling. It is similar to half the effective intensity fluctuation line width of the single mode laser and thus dominates above threshold.

Wavelength stabilized ns-MOPA diode laser system with 16 W peak power and a spectral line width below 10 pm

2014 ◽  
Vol 29 (3) ◽  
pp. 035012 ◽  
Author(s):  
Thi Nghiem Vu ◽  
Andreas Klehr ◽  
Bernd Sumpf ◽  
Hans Wenzel ◽  
Götz Erbert ◽  
...  
Keyword(s):  
Spectral Line ◽  
Diode Laser ◽  
Line Width ◽  
Peak Power ◽  
Laser System ◽  
Spectral Line Width

scholarly journals Red-blue-green solid state light sources using a narrow line-width green phosphor

2015 ◽  
Vol 23 (7) ◽  
pp. A309 ◽  
Author(s):  
A. Liu ◽  
A. Khanna ◽  
P.S. Dutta ◽  
M. Shur
Keyword(s):  
Solid State ◽  
Line Width ◽  
Light Sources ◽  
Narrow Line ◽  
Green Phosphor ◽  
Narrow Line Width

scholarly journals 1H line width dependence on MAS speed in solid state NMR – Comparison of experiment and simulation

2018 ◽  
Vol 291 ◽  
pp. 32-39 ◽  
Author(s):  
Ulrich Sternberg ◽  
Raiker Witter ◽  
Ilya Kuprov ◽  
Jonathan M. Lamley ◽  
Andres Oss ◽  
...  
Keyword(s):  
Solid State ◽  
Line Width ◽  
Solid State Nmr ◽  
Experiment And Simulation
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