Stimulated-emission cross sections and nonradiative relaxation of theL6′5state of trivalent americium in fluorozirconate glass

1992 ◽  
Vol 45 (9) ◽  
pp. 4561-4565 ◽  
Author(s):  
Mark C. Williams ◽  
R. T. Brundage
Keyword(s):  
Cross Sections ◽  
Stimulated Emission ◽  
Nonradiative Relaxation ◽  
Fluorozirconate Glass

scholarly journals Temperature-Dependent Stimulated Emission Cross-Section in Nd3+:YLF Crystal

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 431
Author(s):  
Giorgio Turri ◽  
Scott Webster ◽  
Michael Bass ◽  
Alessandra Toncelli
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Room Temperature ◽  
Radiative Decay ◽  
Emission Cross Section ◽  
Spectroscopic Properties ◽  
Stimulated Emission ◽  
Different Temperatures ◽  
Stimulated Emission Cross Section ◽  
Semi Empirical

Spectroscopic properties of neodymium-doped yttrium lithium fluoride were measured at different temperatures from 35 K to 350 K in specimens with 1 at% Nd3+ concentration. The absorption spectrum was measured at room temperature from 400 to 900 nm. The decay dynamics of the 4F3/2 multiplet was investigated by measuring the fluorescence lifetime as a function of the sample temperature, and the radiative decay time was derived by extrapolation to 0 K. The stimulated-emission cross-sections of the transitions from the 4F3/2 to the 4I9/2, 4I11/2, and 4I13/2 levels were obtained from the fluorescence spectrum measured at different temperatures, using the Aull–Jenssen technique. The results show consistency with most results previously published at room temperature, extending them over a broader range of temperatures. A semi-empirical formula for the magnitude of the stimulated-emission cross-section as a function of temperature in the 250 K to 350 K temperature range, is presented for the most intense transitions to the 4I11/2 and 4I13/2 levels.

Stimulated-emission cross sections of the ^5F_1–^5I_5 and ^5F_1–^5I_6 transitions of Pm^3+ in a phosphate glass

1989 ◽  
Vol 14 (16) ◽  
pp. 856 ◽  
Author(s):  
R. Beach ◽  
S. Weinzapfel ◽  
R. Staver ◽  
R. Solarz ◽  
M. Shinn ◽  
...  
Keyword(s):  
Phosphate Glass ◽  
Cross Sections ◽  
Stimulated Emission

scholarly journals Polarized spectroscopy of electric and magnetic dipole transitions of Europium (III) ions in C2 sites

2021 ◽  
Vol 2086 (1) ◽  
pp. 012175
Author(s):  
A Volokitina ◽  
P Loiko ◽  
E Dunina ◽  
A Kornienko ◽  
J M Serres ◽  
...  
Keyword(s):  
Magnetic Dipole ◽  
Cross Sections ◽  
Luminescent Properties ◽  
Stimulated Emission ◽  
Laser Operation ◽  
Polarization Anisotropy ◽  
Selection Rules ◽  
Polarized Spectroscopy ◽  
Low Symmetry ◽  
Tungstate Crystal

Abstract Polarization anisotropy of luminescent properties of europium (III) ions in low-symmetry C2 sites is studied using monoclinic (sp. gr. C2/c) tungstate crystal KY(WO4)2. The 5D0 → 7FJ (where J = 0…6) transitions are characterized for the principal light polarizations. Polarization selection rules for the magnetic dipole 5D0 → 7F1 transition are presented. The stimulated-emission cross-sections for Eu3+ ions relevant for laser operation are determined.

scholarly journals Advances in Conjugated Polymer Lasers

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 443 ◽  
Author(s):  
Hongyan Xia ◽  
Chang Hu ◽  
Tingkuo Chen ◽  
Dan Hu ◽  
Muru Zhang ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Cross Sections ◽  
Conjugated Polymer ◽  
Low Cost ◽  
Research Direction ◽  
Stimulated Emission ◽  
Laser Materials ◽  
Radiation Mechanism ◽  
The Subject ◽  
Low Cost Manufacturing

This paper provides a review of advances in conjugated polymer lasers. High photoluminescence efficiencies and large stimulated emission cross-sections coupled with wavelength tunability and low-cost manufacturing processes make conjugated polymers ideal laser gain materials. In recent years, conjugated polymer lasers have become an attractive research direction in the field of organic lasers and numerous breakthroughs based on conjugated polymer lasers have been made in the last decade. This paper summarizes the recent progress of the subject of laser processes employing conjugated polymers, with a focus on the photoluminescence principle and excitation radiation mechanism of conjugated polymers. Furthermore, the effect of conjugated polymer structures on the laser threshold is discussed. The most common polymer laser materials are also introduced in detail. Apart from photo-pumped conjugated polymer lasers, a direction for the future development of electro-pumped conjugated polymer lasers is proposed.

VUV SPECTROSCOPY OF CRYSTALLINE EMITTERS BASED ON 5d–4f TRANSITIONS IN RARE EARTH IONS

2002 ◽  
Vol 09 (01) ◽  
pp. 621-626 ◽  
Author(s):  
V. N. MAKHOV ◽  
N. YU. KIRIKOVA ◽  
N. M. KHAIDUKOV ◽  
M. KIRM ◽  
E. NEGODIN ◽  
...  
Keyword(s):  
Stokes Shift ◽  
Laser Action ◽  
Spectroscopic Properties ◽  
Rare Earth Ions ◽  
Stimulated Emission ◽  
Solid State Lasers ◽  
Nonradiative Relaxation ◽  
Level Laser ◽  
Vuv Spectroscopy ◽  
Strong Spin

The spectroscopic properties of several fluoride crystals ( LiYF 4, KYF 4, K 2 YF 5, KLiYF 5, CsY 2 F 7, SrF 2) doped with Nd 3+, Er 3+ or Tm 3+ are analyzed from the viewpoint of their possible applications as active media for VUV solid state lasers. It has been found that in many crystals there exists very efficient nonradiative relaxation from higher-lying 5d states to the lowest 5d level responsible for the spin-forbidden luminescence. In fact, the energy level diagram of 5d–4f transitions for these two ions represents a typical four-level laser scheme with a considerably larger Stokes shift of 5d–4f luminescence from the edge of the strong spin-allowed 4f–5d absorption than for Nd 3+, which causes smaller reabsorption of emitted VUV radiation in the crystals doped with Er 3+ or Tm 3+. Two crystals LiYF 4: Nd 3+ and SrF 2: Er 3+ were tested for laser action under pumping by a pulsed F 2 laser operating at 157 nm. However, no indications of the appearance of stimulated emission have been detected for both crystals. The possible reasons for the absence of lasing are discussed.

scholarly journals Orbital alignment cross sections by stimulated emission probing: The state‐to‐state Ca Rydberg process Ca(4s17d 1D2)+Xe→Ca(4s18p 1P1)+Xe

1995 ◽  
Vol 102 (24) ◽  
pp. 9532-9536 ◽  
Author(s):  
Eileen M. Spain ◽  
Mark J. Dalberth ◽  
Paul D. Kleiber ◽  
Stephen R. Leone ◽  
Stefan S. Op de Beek ◽  
...  
Keyword(s):  
Cross Sections ◽  
The State ◽  
Stimulated Emission

scholarly journals Спектрально-люминесцентные свойства Yb-=SUP=-3+-=/SUP=- в растворах SO-=SUB=-2-=/SUB=-Cl-=SUB=-2-=/SUB=--GaCl-=SUB=-3-=/SUB=--Yb-=SUP=-3+-=/SUP=-

2021 ◽  
Vol 129 (12) ◽  
pp. 1484
Author(s):  
Е.А. Серегина ◽  
А.А. Серегин ◽  
Г.В. Тихонов
Keyword(s):  
Active Medium ◽  
Cross Sections ◽  
Spectral Dependence ◽  
Energy Levels ◽  
Stimulated Emission ◽  
Stark Splitting ◽  
Diode Pumped ◽  
Measured Information

The spectra of absorption, luminescence, and lifetime of Yb3+ in SO2Cl2 – GaCl3 – Yb3+ solutions were measured. Information is obtained on the Stark splitting of energy levels, absorption and stimulated emission cross sections of Yb3+. An analysis of the spectral dependence of the gain cross sections indicates that the SOCl2 – GaCl3 – Yb3 solution is promising as the active medium of a diode-pumped liquid ytterbium laser.

Judd–Ofelt modeling, stimulated-emission cross-sections and non-radiative relaxation in Er3+:K2YF5 crystals

2016 ◽  
Vol 180 ◽  
pp. 103-110 ◽  
Author(s):  
P.A. Loiko ◽  
E.V. Vilejshikova ◽  
N.M. Khaidukov ◽  
M.N. Brekhovskikh ◽  
X. Mateos ◽  
...  
Keyword(s):  
Cross Sections ◽  
Stimulated Emission ◽  
Radiative Relaxation
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