CO2 chirped-probe-pulse femtosecond CARS thermometry

2020 ◽  
Author(s):  
Mingming Gu ◽  
Aman Satija ◽  
Robert P. Lucht
Keyword(s):  
Probe Pulse

scholarly journals Chirped-probe-pulse femtosecond CARS thermometry in turbulent spray flames

2019 ◽  
Vol 37 (2) ◽  
pp. 1383-1391 ◽  
Author(s):  
A. Lowe ◽  
L.M. Thomas ◽  
A. Satija ◽  
R.P. Lucht ◽  
A.R. Masri
Keyword(s):  
Probe Pulse ◽  
Spray Flames ◽  
Turbulent Spray

Five kHz thermometry in turbulent spray flames using chirped-probe pulse femtosecond CARS, part I: Processing and interference analysis

2019 ◽  
Vol 200 ◽  
pp. 405-416 ◽  
Author(s):  
Levi M. Thomas ◽  
Albyn Lowe ◽  
Aman Satija ◽  
Assaad R. Masri ◽  
Robert P. Lucht
Keyword(s):  
Probe Pulse ◽  
Interference Analysis ◽  
Spray Flames ◽  
Turbulent Spray

Laser-induced alignment dynamics of gas phase CS2 dimers

2020 ◽  
Vol 22 (6) ◽  
pp. 3245-3253 ◽  
Author(s):  
Adam S. Chatterley ◽  
Mia O. Baatrup ◽  
Constant A. Schouder ◽  
Henrik Stapelfeldt
Keyword(s):  
Laser Pulse ◽  
Gas Phase ◽  
Carbon Disulfide ◽  
Probe Pulse ◽  
Coulomb Explosion ◽  
Rotational Dynamics ◽  
Circularly Polarized

Rotational dynamics of gas phase carbon disulfide (CS2) dimers were induced by a moderately intense, circularly polarized alignment laser pulse and measured as a function of time by Coulomb explosion imaging with an intense fs probe pulse.

PROBE — Profile Resolution Obtained by Excitation

1978 ◽  
Vol 32 (4) ◽  
pp. 381-388 ◽  
Author(s):  
R. M. Measures
Keyword(s):  
Spatial Distribution ◽  
Spatial Resolution ◽  
Pump Pulse ◽  
Probe Pulse ◽  
Laser Pulses ◽  
Laser Induced Fluorescence ◽  
Line Of Sight ◽  
Theoretical Formulation ◽  
New Approach ◽  
Fluorescence Methods

A new approach for evaluating, with spatial resolution, the line of sight properties of a specific constituent is proposed. This PROBE (profile resolution obtained by excitation) concept involves the use of two counter-propagating laser pulses; a pump pulse to condition the medium and a probe pulse to interrogate the medium where the pulses overlap. In this way, information regarding the spatial distribution of a species is transformed into temporal information in the form of a change in the amplitude of a returned probe pulse. For certain situations the PROBE technique offers several advantages over scattering or laser induced fluorescence methods. A theoretical formulation of the concept clearly indicates the importance of the lifetime of the pumped state.

Revisiting chirped probe pulse electro-optic terahertz detection

2007 ◽  
Author(s):  
B. Yellampalle ◽  
K. Y. Kim ◽  
G. Rodriguez ◽  
J. H. Glownia ◽  
A. J. Taylor
Keyword(s):  
Probe Pulse ◽  
Terahertz Detection ◽  
Electro Optic

Photoionization of NaK molecule with a double-well potential in femtosecond pump–probe pulse laser fields

2006 ◽  
Vol 15 (9) ◽  
pp. 1996-2001 ◽  
Author(s):  
Yu Jie ◽  
Wang Sen-Ming ◽  
Yuan Kai-Jun ◽  
Cong Shu-Lin
Keyword(s):  
Pulse Laser ◽  
Probe Pulse ◽  
Laser Fields ◽  
Pump Probe ◽  
Double Well Potential

scholarly journals The Influence of Laser Linewidth on the Brillouin Shift Frequency Accuracy of BOTDR

2018 ◽  
Vol 9 (1) ◽  
pp. 58 ◽  
Author(s):  
Qing Bai ◽  
Min Yan ◽  
Bo Xue ◽  
Yan Gao ◽  
Dong Wang ◽  
...  
Keyword(s):  
Probe Pulse ◽  
Measurement Accuracy ◽  
Signal To Noise Ratio ◽  
Gain Spectrum ◽  
Laser Source ◽  
Laser Linewidth ◽  
Optical Time Domain Reflectometer ◽  
Brillouin Gain ◽  
Optical Time ◽  
Shift Frequency

This paper analyzes the influence of laser linewidth on the measurement accuracy of a frequency-scanning Brillouin optical time domain reflectometer (FS-BOTDR), allowing for both the width of Brillouin gain spectrum and the signal-to-noise ratio (SNR) of the BOTDR system. The measurement accuracy of the Brillouin frequency shift (BFS) is theoretically investigated versus the duration of the probe pulse and the linewidth of the laser source, by numerically simulating how a FS-BOTDR works and evaluating the Brillouin gain spectrum (BGS) width and the system SNR. The simulation results show that the BFS accuracy is improved as the laser linewidth becomes narrower when the probe pulse width is fixed. We utilize five types of lasers with respective linewidths of 1.05 MHz, 101 kHz, 10.2 kHz, 3.1 kHz, and 98 Hz to compare the BFS measurement accuracy over a ~10 km optical sensing fiber. The experimental results demonstrate that the root-mean-square error (RMSE) of BFS decreases with the laser linewidth narrowing from 1.05 MHz to 3.1 kHz, which is in good agreement with the numerical simulation. However, the RMSE of BFS increases when the laser linewidth is less than 3.1 kHz, which may arise from the coherent Rayleigh noise due to a too narrow laser linewidth. The results can provide a theoretical basis and experimental guidance for choosing the appropriate laser linewidth in BOTDR.

Femtosecond stimulated Raman spectroscopy modeled with a delta probe pulse: application to rhodamine 6G

2010 ◽  
Vol 42 (4) ◽  
pp. 563-575 ◽  
Author(s):  
Xueqiong Qiu ◽  
Xiuting Li ◽  
Kai Niu ◽  
Soo-Y. Lee
Keyword(s):  
Raman Spectroscopy ◽  
Probe Pulse ◽  
Rhodamine 6G ◽  
Stimulated Raman

GIANT THIRD-ORDER KERR NONLINEARITIES AND SLOW OPTICAL SOLITONS IN DOUBLE QUANTUM-WELL

2010 ◽  
Vol 24 (17) ◽  
pp. 1899-1905
Author(s):  
XUN XIAO
Keyword(s):  
Quantum Wells ◽  
Probe Pulse ◽  
Optical Solitons ◽  
Double Quantum ◽  
Third Order ◽  
Raman Resonance ◽  
Linear Absorption ◽  
Two Photon ◽  
Double Quantum Well ◽  
Slow Group

We show the formation of slow optical solitons in the asymmetric coupled double quantum wells (CQW) via a two-photon Raman resonance. With the consideration of real parameters in AlGaAs -based CQW, we indicate the possibility to have cancelation of the linear absorption, giant Kerr nonlinearities, and slow group velocity propagation of the weak probe pulse at the same one-photon detuning frequency around several THz .

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