Self-referenced Q-switched pump-probe transmission experiment for the determination of the degree of clustering in Er-doped planar waveguides

1999 ◽  
Author(s):  
J. Philipsen ◽  
P. Gastaldo ◽  
C. Cassagnettes ◽  
D. Barbier ◽  
A. Kevorkian ◽  
...  
Keyword(s):  
Planar Waveguides ◽  
Transmission Experiment ◽  
Pump Probe ◽  
Probe Transmission ◽  
Er Doped

Determination of Relative Number Densities and Quenching Rates of Sodium in an Atmospheric Flame by Asynchronous Optical Sampling

1988 ◽  
Vol 117 ◽  
Author(s):  
Gregory J. Fiechtner ◽  
Yanan Jiang ◽  
Galen B. King ◽  
Normand M. Laurendeau ◽  
Fred E. Lytle
Keyword(s):  
Signal To Noise Ratio ◽  
Relative Number ◽  
Relaxation Rates ◽  
Pump Probe ◽  
Optical Sampling ◽  
Nd:Yag Lasers ◽  
Pump And Probe ◽  
Phase Systems ◽  
Excitation Processes

Pump/probe methods are commonly employed to measure subnanosecond excited state processes in liquid and gas phase systems. Asynchronous Optical Sampling (ASOPS) is a newly-developed pump/probe method that will potentially allow the determination of number densities and relaxation rates in turbulent, high-pressure flames. In addition, ASOPS should yield a better signal-to-noise ratio than laser-induced fluorescence in practical combustion environments. The ASOPS method utilizes a coherent, signal-carrying beam and thus requires no more optical access than LDV measurements. The current ASOPS instrument consists of two dye lasers synchronously pumped by two frequency-doubled, mode-locked Nd:YAG lasers. The two lasers operate at slightly different repetition rates, causing a relative phase walk-out between the pump and probe beams. This strategy allows the mapping of subnanosecond excitation processes in a time scale on the order of milliseconds.

INTERBAND TWO-PHOTON TRANSITION IN MOTT INSULATOR AS A NEW MECHANISM FOR ULTRAFAST OPTICAL NONLINEARITY

2001 ◽  
Vol 15 (28n30) ◽  
pp. 3628-3632 ◽  
Author(s):  
M. Ashida ◽  
T. Ogasawara ◽  
N. Motoyama ◽  
H. Eisaki ◽  
S. Uchida ◽  
...  
Keyword(s):  
Excited State ◽  
Optical Switching ◽  
Near Infrared ◽  
Optical Nonlinearity ◽  
Infrared Region ◽  
Pump Probe ◽  
Two Photon ◽  
Ultrafast Optical ◽  
Order Of Magnitude ◽  
Probe Transmission

The dimensionality dependence of optical nonlinearity in cuprates was investigated by sub-picosecond pump-probe transmission measurements in the near-infrared region. It was found that cuprates with one-dimensional Cu-O networks show nonlinearity one order of magnitude larger than that of conventional band semiconductors and picosecond relaxation of the excited state. In contrast, a two-dimensional cuprate shows one order of magnitude smaller nonlinearity and slower decay of the excited state, as well as picosecond relaxation. The possibility for application of the present material to all-optical switching devices is also discussed.

Measurements of Melting Velocities in Gold Films on a Picosecond Time Scale

1992 ◽  
Vol 279 ◽  
Author(s):  
B. E. Homan ◽  
M. T. Connery ◽  
D. E. Harrison ◽  
C. A. Macdonald
Keyword(s):  
Direct Measurement ◽  
Time Scale ◽  
Dye Laser ◽  
Gold Films ◽  
Interfacial Velocity ◽  
Pump Probe ◽  
Laser Probe ◽  
Picosecond Time Scale ◽  
Probe Transmission ◽  
Transmission Measurements

ABSTRACTMelting velocities were measured in thin gold films by performing pump/probe transmission measurements using a unique picosecond excimer pump and dye laser probe. Monitoring the depth of the liquid by changes in the near psuedo-Brewster's angle transmission allowed for direct measurement of crystal/melt interfacial velocity up to 1500 m/s.

scholarly journals Unambiguous determination of spin dephasing times in ZnO by time-resolved magneto-optical pump-probe experiments

2014 ◽  
Vol 251 (9) ◽  
pp. 1861-1871 ◽  
Author(s):  
Sebastian Kuhlen ◽  
Ralph Ledesch ◽  
Robin de Winter ◽  
Matthias Althammer ◽  
Sebastian T. B. Gönnenwein ◽  
...  
Keyword(s):  
Optical Pump ◽  
Time Resolved ◽  
Pump Probe ◽  
Spin Dephasing ◽  
Unambiguous Determination

Erbium-Doped Barium Titanate Thin FilmWaveguides For Integrated Optical Amplifiers

2001 ◽  
Vol 688 ◽  
Author(s):  
Andrew R. Teren ◽  
Seong-Soo Kim ◽  
Seng-Tiong Ho ◽  
Bruce W. Wessels
Keyword(s):  
Optical Gain ◽  
Chemical Vapor ◽  
Stimulated Emission ◽  
Organic Chemical ◽  
Pump Probe ◽  
Factors Affecting ◽  
Luminescence Efficiency ◽  
Metal Organic ◽  
Thin Film Waveguides ◽  
Er Doped

AbstractThe factors affecting optical gain were studied for Er-doped BaTiO3 thin film waveguides. Er-doped BaTiO3 with dopant concentrations of 0.3 – 9 at.% was deposited by metal-organic chemical vapor deposition. The luminescence efficiency was maximized by optimizing the growth temperature and erbium concentration as well as by post-deposition annealing. Stimulated emission was studied using the pump-probe technique over the spectral range of 1,520-1,550 nm. A maximum differential gain of 3 dB/cm was measured at 1,540 nm in an 8 mm long, 8 μm wide ridge waveguide.

STIMULATED SCATTERING IN AN OPTICAL LATTICE

1996 ◽  
Vol 05 (04) ◽  
pp. 851-861
Author(s):  
S. GUIBAL ◽  
L. GUIDONI ◽  
J. ZACHOROWSKI ◽  
J.-Y. COURTOIS ◽  
P. VERKERK ◽  
...  
Keyword(s):  
Radiation Pressure ◽  
Transmission Spectrum ◽  
Optical Lattice ◽  
Elementary Excitation ◽  
Stimulated Scattering ◽  
Pump Probe ◽  
Nonlinear Media ◽  
Show Evidence ◽  
Probe Transmission ◽  
Probe Spectroscopy

We present a study of pump-probe spectroscopy experiments in an optical lattice. The probe transmission spectrum contains three types of resonances similar to those found in usual nonlinear media: Raman, Brillouin and Rayleigh resonances. We show evidence of the existence of a propagating elementary excitation in the lattice which involves no interaction between the particles and lead to a Brillouin-like scattering. We discuss the central Rayleigh resonance and show that its shape is sensitive to the radiation pressure.

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