Influence of intramolecular vibrations in third-order, time-domain resonant spectroscopies. I. Experiments

2001 ◽  
Vol 114 (18) ◽  
pp. 8008-8019 ◽  
Author(s):  
Delmar S. Larsen ◽  
Kaoru Ohta ◽  
Qing-Hua Xu ◽  
Michelle Cyrier ◽  
Graham R. Fleming
Keyword(s):  
Time Domain ◽  
Third Order ◽  
Intramolecular Vibrations

Influence of intramolecular vibrations in third-order, time-domain resonant spectroscopies. II. Numerical calculations

2001 ◽  
Vol 114 (18) ◽  
pp. 8020-8039 ◽  
Author(s):  
Kaoru Ohta ◽  
Delmar S. Larsen ◽  
Mino Yang ◽  
Graham R. Fleming
Keyword(s):  
Time Domain ◽  
Numerical Calculations ◽  
Third Order ◽  
Intramolecular Vibrations

Determination of third-order nonlinear susceptibilityχ(3)through measurements in the picosecond time domain

1984 ◽  
Vol 30 (12) ◽  
pp. 7358-7361 ◽  
Author(s):  
B. K. Rhee ◽  
W. E. Bron ◽  
J. Kuhl
Keyword(s):  
Time Domain ◽  
Third Order

4-Channel, time-domain measurement system using track and hold amplifier for the characterization and linearization of high-power amplifiers

2011 ◽  
Vol 4 (1) ◽  
pp. 71-79 ◽  
Author(s):  
Sajjad Ahmed ◽  
Mohammad Saad El Dine ◽  
Guillaume Neveux ◽  
Tibault Reveyrand ◽  
Denis Barataud ◽  
...  
Keyword(s):  
Measurement System ◽  
Time Domain ◽  
Power Amplifiers ◽  
Test Bench ◽  
Dynamic Range ◽  
Circuit Complexity ◽  
Third Order ◽  
Transfer Characteristics ◽  
Rf Signals ◽  
Phase Amplitude

We propose in this paper a 4-channel time-domain test bench for the characterization and linearity enhancement of microwave power amplifiers (PAs). The proposed time-domain measurement system utilizes four track and hold amplifiers (THAs) for direct subsampling of radiofrequency (RF) signals. The use of wideband THAs to replace samplers or mixers enables reducing analog IF circuit complexity. It permits direct digitization of RF signals like CW, two-tone and pulsed modulated signals, bringing more flexibility in the receiver's performance by enhancing the dynamic range and bandwidth. This test bench is capable of completely extracting the phase, amplitude, and transfer characteristics of non-linear devices excited with CW or modulated RF signals. In this work, two-tone transfer characteristics of a 50 W GaN HEMT Nitronex PA were extracted and processed for applying digital pre-distortion linearization to enhance linearity performance. Time-domain envelope and carrier waveforms (voltage and current) along with third-order inter-modulation distortion (IMD) products with and without digital pre-distortion scheme are also presented.

scholarly journals Simultaneous ultrafast probing of intramolecular vibrations and photoinduced charge carriers in rubrene using broadband time-domain THz spectroscopy

2007 ◽  
Vol 75 (19) ◽  
Author(s):  
Mattijs Koeberg ◽  
Euan Hendry ◽  
Juleon M. Schins ◽  
Hendrik A. van Laarhoven ◽  
Cees F. J. Flipse ◽  
...  
Keyword(s):  
Time Domain ◽  
Charge Carriers ◽  
Thz Spectroscopy ◽  
Intramolecular Vibrations ◽  
Photoinduced Charge

Time-domain fluorescence-guided diffuse optical tomography based on the third-order simplified harmonics approximation

2012 ◽  
Vol 51 (36) ◽  
pp. 8656 ◽  
Author(s):  
Wenjuan Ma ◽  
Wei Zhang ◽  
Xi Yi ◽  
Jiao Li ◽  
Linhui Wu ◽  
...  
Keyword(s):  
Time Domain ◽  
Optical Tomography ◽  
Diffuse Optical Tomography ◽  
Third Order ◽  
The Third
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