Infrared excited-state absorption and stimulated-emission cross sections of Er3+-doped crystals

1995 ◽  
Vol 61 (2) ◽  
pp. 151-158 ◽  
Author(s):  
J. Koetke ◽  
G. Huber
Keyword(s):  
Excited State ◽  
Cross Sections ◽  
Excited State Absorption ◽  
Stimulated Emission

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 and stimulated emission of Nd 3+ in crystals III: LaSc 3 (BO 3 ) 4 , CaWO 4 , and YLiF 4

1999 ◽  
Vol 68 (1) ◽  
pp. 67-72 ◽  
Author(s):  
L. Fornasiero ◽  
T. Kellner ◽  
S. Kück ◽  
J.P. Meyn ◽  
P.E.-A. Möbert ◽  
...  
Keyword(s):  
Excited State ◽  
Excited State Absorption ◽  
Stimulated Emission

Stimulated emission and excited state absorption in neodymium-doped CaNb2O6 single crystal fibers grown by the LHPG technique

2005 ◽  
Vol 80 (4-5) ◽  
pp. 497-502 ◽  
Author(s):  
A. S. S. De Camargo ◽  
R. Almeida Silva ◽  
J. P. Andreeta ◽  
L. A. O. Nunes
Keyword(s):  
Excited State ◽  
Single Crystal ◽  
Excited State Absorption ◽  
Stimulated Emission ◽  
Crystal Fibers

Cross sections for excited-state absorption in a Pt:ethynyl complex

2001 ◽  
Vol 18 (3) ◽  
pp. 358 ◽  
Author(s):  
T. J. McKay ◽  
J. Staromlynska ◽  
J. R. Davy ◽  
J. A. Bolger
Keyword(s):  
Excited State ◽  
Cross Sections ◽  
Excited State Absorption

Erbium Doped Tellurite Glasses

1991 ◽  
Vol 244 ◽  
Author(s):  
Jau-Sheng Wang ◽  
Elias Snitzer ◽  
George H. Sigel
Keyword(s):  
Excited State ◽  
Cross Section ◽  
Cross Sections ◽  
Ground State ◽  
Optical Transition ◽  
Emission Cross Section ◽  
Excited State Absorption ◽  
Tellurite Glasses ◽  
Ground State Absorption ◽  
Erbium Doped

ABSTRACTThe results to be presented focus on the optimization of tellurite glass compositions which are suitable both for doping with erbium oxide as well as subsequent for fiber drawing. The laser related properties, such as fluorescence spectrum, lifetime, and optical transition cross sections will be presented. Judd-Ofelt parameters for erbium in the glasses have been exploited to predict fluorescence lifetime, excited state absorption(ESA), ground state absorption(GSA) and ground state fluorescence(GSF). For comparison, the absorption cross section, emission cross section, excited state absorption(ESA)/ground state absorption(GSA)(0.8μm pumping) and fluorescence terminating in the ground state(GSF)/excited state absorption(ESA) ratios are calculated for both Al2O3-SiO2 and tellurite glasses.

scholarly journals Ultrafast stimulated emission microscopy of single nanocrystals

Science ◽  
2019 ◽  
Vol 366 (6470) ◽  
pp. 1240-1243 ◽  
Author(s):  
Lukasz Piatkowski ◽  
Nicolò Accanto ◽  
Gaëtan Calbris ◽  
Sotirios Christodoulou ◽  
Iwan Moreels ◽  
...  
Keyword(s):  
Excited State ◽  
Spontaneous Emission ◽  
Single Molecule ◽  
Room Temperature ◽  
Direct Detection ◽  
Excited State Absorption ◽  
Stimulated Emission ◽  
Detection Capability ◽  
Emission Signal ◽  
Carrier Population

Single-molecule detection is a powerful method used to distinguish different species and follow time trajectories within the ensemble average. However, such detection capability requires efficient emitters and is prone to photobleaching, and the slow, nanosecond spontaneous emission process only reports on the lowest excited state. We demonstrate direct detection of stimulated emission from individual colloidal nanocrystals at room temperature while simultaneously recording the depleted spontaneous emission, enabling us to trace the carrier population through the entire photocycle. By capturing the femtosecond evolution of the stimulated emission signal, together with the nanosecond fluorescence, we can disentangle the ultrafast charge trajectories in the excited state and determine the populations that experience stimulated emission, spontaneous emission, and excited-state absorption processes.

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