Excited State Absorption in Pr3+ Doped Fluorozirconate Glass

1991 ◽  
Vol 244 ◽  
Author(s):  
R. S. Quimby ◽  
B. Zheng
Keyword(s):  
Excited State ◽  
Excited State Absorption ◽  
Fiber Amplifier ◽  
Pump Probe ◽  
Probe Technique ◽  
Zblan Glass ◽  
Fluorozirconate Glass ◽  
A New Technique ◽  
Doped Glass ◽  
Good Agreement

ABSTRACTThe excited state absorption (ESA) spectrum for Pr3+ doped ZBLAN glass is determined using a new technique based on the McCumber theory [D.E. McCumber, Phys. Rev. 136, A954 (1964)]. ESA peaks at 1380 and 840 nm are found, corresponding to transitions from the 1G4 to the 1D2 and 1I6 levels, respectively. ESA at the fiber amplifier pump wavelength 1.017 μm is found to be very small. The new method is also applied to Er+ doped glass, and good agreement is obtained between the resulting ESA spectrum and previous measurements using a traditional pump-probe technique.

Bringing light into the dark triplet space of molecular systems

2015 ◽  
Vol 17 (19) ◽  
pp. 13129-13136 ◽  
Author(s):  
Jing Ge ◽  
Qun Zhang ◽  
Jun Jiang ◽  
Zhigang Geng ◽  
Shenlong Jiang ◽  
...  
Keyword(s):  
Excited State ◽  
Pump Probe ◽  
Probe Technique ◽  
Excited State Dynamics ◽  
Molecular Systems

A novel pump–probe technique is developed to map out the excited-state dynamics in the triplet space of molecular systems.

Measurement of the Excited-State Molecular Polarizability of C60

1994 ◽  
Vol 359 ◽  
Author(s):  
N. Tang ◽  
R. W. Hellwarth ◽  
J. P. Partanen
Keyword(s):  
Excited State ◽  
Cross Section ◽  
Benzene Solution ◽  
Excited State Absorption ◽  
Molecular Polarizability ◽  
Wave Mixing ◽  
Pump Probe ◽  
Probe Experiment ◽  
Pump Probe Experiment ◽  
532 Nm

ABSTRACTWe use ∼30 ps pulses at 532 nm to measure the complex excited-state molecular polarizability αe in a C60/benzene solution. We determine the imaginary part of αe by measuring the excited-state absorption cross-section in a pump-probe experiment. In a degenerate-four-wave-mixing (DFWM) experiment, we find that in delayed probing of the complex index gratings formed by ∼30 ps pulses, the thermal and the excited-state polarizability changes both contribute to these transient gratings.

Excited-state absorption at 980 nm in erbium-doped glass

1992 ◽  
Author(s):  
Richard S. Quimby ◽  
William J. Miniscalco ◽  
Barbara A. Thompson
Keyword(s):  
Excited State ◽  
Excited State Absorption ◽  
Erbium Doped ◽  
Doped Glass

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.

Crystal field analysis of the ground and excited state absorption of a Cr4+ ion in LiAlO2 and LiGaO2 crystals

Open Physics ◽  
2005 ◽  
Vol 3 (4) ◽  
Author(s):  
Mikhail Brik ◽  
Nicolae Avram ◽  
Calin Avram
Keyword(s):  
Excited State ◽  
Crystal Field ◽  
Excited State Absorption ◽  
Field Analysis ◽  
Lithium Aluminum ◽  
Crystal Field Theory ◽  
Charge Model ◽  
Exchange Charge Model ◽  
Overlap Model ◽  
Good Agreement

AbstractThe exchange charge model of crystal field theory has been used to analyze the ground and excited state absorption of tetrahedrally coordinated Cr4+ ion in lithium aluminum oxide LiAlO2 (γ-phase) and lithium dioxogallate LiGaO2. The parameters of the crystal field acting on the Cr4+ ion are calculated from the crystal structure data, taking into account the crystal lattice ions located at distances up to 12.744 Å in LiGaO2 and 13. 180 Å in LiAlO2. The obtained energy level schemes were compared with experimental ground and excited state absorption spectra and literature data on the application of other crystal field models (the angular overlap model and Racah theory) to the considered crystals; a good agreement with experimental data is demonstrated.

Observing ground state vibrational coherence and excited state relaxation dynamics of a cyanine dye in pure solvents

2018 ◽  
Vol 20 (19) ◽  
pp. 13400-13411 ◽  
Author(s):  
Dipak Kumar Das ◽  
Krishnandu Makhal ◽  
Debabrata Goswami
Keyword(s):  
Excited State ◽  
Ground State ◽  
Cyanine Dye ◽  
Relaxation Dynamics ◽  
Pump Probe ◽  
Probe Technique ◽  
Vibrational Coherence

Using a degenerate pump probe technique at 800 nm, Ground State Vibrational Coherence (GSVC) of a cyanine dye (IR780) is explored in various solvents.

Upconversion and 980-nm excited-state absorption in erbium-doped glass

1993 ◽  
Author(s):  
Richard S. Quimby ◽  
William J. Miniscalco ◽  
Barbara A. Thompson
Keyword(s):  
Excited State ◽  
Excited State Absorption ◽  
Erbium Doped ◽  
Doped Glass
Sign in / Sign up

Export Citation Format

Share Document