Excited state cross sections for Er-doped glasses

1991 ◽  
Author(s):  
Stanley A. Zemon ◽  
Gary M. Lambert ◽  
William J. Miniscalco ◽  
Richard W. Davies ◽  
Bruce T. Hall ◽  
...  
Keyword(s):  
Excited State ◽  
Cross Sections ◽  
Doped Glasses ◽  
Er Doped

Excited State Absorption and Cross Sections for Er-Doped Glasses

1989 ◽  
Vol 172 ◽  
Author(s):  
S. Zemon ◽  
G. Lambert ◽  
W. J. Miniscalco ◽  
L. J. Andrews ◽  
B. T. Hall
Keyword(s):  
Excited State ◽  
Excited States ◽  
Cross Sections ◽  
Ground State ◽  
Excited State Absorption ◽  
Fiber Amplifiers ◽  
Oscillator Strengths ◽  
Ground State Absorption ◽  
Doped Glasses ◽  
Er Doped

AbstractPump-excited-state-absorption (ESA) measurements on Er3+-doped phosphates, fluorophosphates, and silicate bulk glasses indicate that ESA cross sections are approximately equal to ground state absorption (GSA) cross sections in the 800-nm band. The oscillator strengths of the ESA and GSA bands are also approximately equal, in qualitative agreement with Judd-Ofelt calculations. Fluorozirconate samples were found to have substantial populations in the upper excited states for the measurement conditions used and ESA transitions originating from four excited states were identified. Fluorozirconate fiber amplifiers and lasers at 1.55 μm, therefore, would have decreased efficiency for 800-nm pumping.

Excited-state-absorption cross sections and amplifier modeling in the 1300-nm region for Nd-doped glasses

1992 ◽  
Vol 4 (3) ◽  
pp. 244-247 ◽  
Author(s):  
S. Zemon ◽  
B. Pedersen ◽  
G. Lambert ◽  
W.J. Miniscalco ◽  
B.T. Hall ◽  
...  
Keyword(s):  
Excited State ◽  
Cross Sections ◽  
Excited State Absorption ◽  
Absorption Cross ◽  
Doped Glasses

Excited-State-Absorption Cross Sections and Amplifier Modeling in the 1300-nm Region for Nd-Doped Glasses

1991 ◽  
Vol 244 ◽  
Author(s):  
S. Zemon ◽  
B. Pedersen ◽  
G. Lambert ◽  
W. J. Miniscalco ◽  
B. T. Hall ◽  
...  
Keyword(s):  
Excited State ◽  
Cross Sections ◽  
Excited State Absorption ◽  
Fiber Amplifier ◽  
Stimulated Emission ◽  
Amplifier Model ◽  
Important Region ◽  
Host Materials ◽  
Doped Glasses ◽  
The Cost

ABSTRACTThe performance of Nd3+-doped fiber amplifiers is limited by strong excited state absorption (ESA) of the signal, even for fluorozirconate glasses where ESA prevents the important region below 1320 nm from being used. To quantify this and explore alternative host materials, ESA and stimulated-emission cross sections have been measured for a representative group of glass compositions. These parameters have been used in an accurate, fiber-amplifier model to provide the first quantitative comparisons of performance for Nd3+-doped glasses in the 1300-nm band as a function of host. A high-fluorine fluorophosphate is predicted to extend the short-wavelength boundary of the gain spectrum to 1295 nm but only at reduced gain levels and at the cost of having lower gains at longer wavelengths than fluorozirconates. A substantial increase in small-signal gain is predicted if the amplified spontaneous emission for the 1050-nm band is suppressed.

Excited-state absorption cross sections in the 800-nm band for Er-doped, Al/P-silica fibers: Measurements and amplifier modeling

1991 ◽  
Vol 3 (7) ◽  
pp. 621-624 ◽  
Author(s):  
S. Zemon ◽  
B. Pedersen ◽  
G. Lambert ◽  
W.J. Miniscalco ◽  
L.J. Andrews ◽  
...  
Keyword(s):  
Excited State ◽  
Cross Sections ◽  
Excited State Absorption ◽  
Absorption Cross ◽  
Silica Fibers ◽  
Er Doped

Composition Dependence of the Judd-Ofelt Intensity Parameters in TeO2-PbF2: Tm3+ Glasses

2004 ◽  
Vol 829 ◽  
Author(s):  
Idris Kabalci ◽  
Gonul Ozen ◽  
Adnan Kurt ◽  
Alphan Sennaroglu
Keyword(s):  
Cross Sections ◽  
Composition Dependence ◽  
Strong Dependence ◽  
Local Environment ◽  
Ground Level ◽  
Absorption Bands ◽  
Intensity Parameters ◽  
Nir Absorption ◽  
Doped Glasses ◽  
Absorption Measurements

ABSTRACTTm3+ -doped glasses with the composition of (1-x)TeO2-xPbF2, where x=10, 15, 20, 25 mol.% were synthesized and, their thermal and absorption measurements were investigated. All the glasses were transparent. The absorption bands corresponding to the absorption of the 1G4, 3F2, 3F3, 3F4, 3H5, and 3H4 levels from the 3H6 ground level of the Tm3+ ion were observed in the optical UV/VIS/NIR absorption measurements. We calculated the integrated absorption cross sections of each band except that of 3H5 level was found to vary with composition of the PbF2. The absorption measurements were first made to determine the spontaneous emission probabilities of the 4f-4f transitions of the Tm3+ ions. The calculations were made by using the Judd - Ofelt theory. The Ω2 parameter shows the strongest dependence on the host composition and it increases with the increasing PbF2 amount. The values Ω4 increases rather slowly while the value of Ω6 is practically independent of the composition. The strong dependence of the parameter Ω2 indicates that this parameter is related to the structural change and symmetry of the local environment of the Tm3+ ions in this glass.

scholarly journals Neutron-inducedγ-ray production cross sections for the first excited-state transitions in20Ne and22Ne

2012 ◽  
Vol 86 (6) ◽  
Author(s):  
S. MacMullin ◽  
M. Boswell ◽  
M. Devlin ◽  
S. R. Elliott ◽  
N. Fotiades ◽  
...  
Keyword(s):  
Excited State ◽  
Cross Sections ◽  
Production Cross ◽  
State Transitions ◽  
First Excited State

scholarly journals Nonlinear absorption properties and excited-state charge-transfer dynamics of Er doped ZnO films

2018 ◽  
Vol 8 (11) ◽  
pp. 3262 ◽  
Author(s):  
Si-Qiu Li ◽  
Cheng-Bao Yao ◽  
Yu Cai ◽  
Yue Han ◽  
Ke-Xin Zhang ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Nonlinear Absorption ◽  
Zno Films ◽  
Absorption Properties ◽  
Doped Zno ◽  
Charge Transfer Dynamics ◽  
Er Doped ◽  
State Charge

Measurement and analysis of cross sections for rare-earth-doped glasses

1992 ◽  
Author(s):  
William J. Miniscalco ◽  
Barbara A. Thompson ◽  
Mark L. Dakss ◽  
Stanley A. Zemon ◽  
Leonard J. Andrews
Keyword(s):  
Rare Earth ◽  
Cross Sections ◽  
Measurement And Analysis ◽  
Doped Glasses ◽  
Rare Earth Doped
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