Frequency upconversion of tunable femtosecond pulses by parametric amplification and sum-frequency generation in a single nonlinear crystal

1995 ◽  
Vol 20 (21) ◽  
pp. 2171 ◽  
Author(s):  
V. Petrov ◽  
F. Noack
Keyword(s):  
Nonlinear Crystal ◽  
Sum Frequency Generation ◽  
Parametric Amplification ◽  
Femtosecond Pulses ◽  
Frequency Upconversion ◽  
Sum Frequency ◽  
Frequency Generation

scholarly journals Sum Squeezing of the Field Amplitude in Frequency Upconversion Process

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Dilip Kumar Giri ◽  
Binod Kumar Choudhary
Keyword(s):  
Fundamental Mode ◽  
Higher Order ◽  
Sum Frequency Generation ◽  
Field Amplitude ◽  
Interaction Time ◽  
Squeezed States ◽  
Frequency Upconversion ◽  
Sum Frequency ◽  
Frequency Generation ◽  
Upconversion Process

Sum squeezing of the field amplitude is studied in the nondegenerate and degenerate frequency upconversion process under the short interaction time. It is shown that sum squeezing can be converted into normal squeezing via sum-frequency generation in the nondegenerate frequency upconversion process, while the amplitude-squared squeezing of the fundamental mode directly changed into the squeezing of the harmonic in the degenerate frequency upconversion process. All reachable conditions of uncorrelated modes for obtaining a sum squeezing in two modes and its dependence on the squeezing of individual field modes are investigated. It is found that the squeezed states are associated with large number of pump photons. It is also confirmed that the higher-order squeezing (sum squeezing) is directly associated with coupling of the field and interaction time.

Sum-frequency generation of femtosecond pulses in CsLiB_6O_10 down to 175 nm

2000 ◽  
Vol 39 (27) ◽  
pp. 5076 ◽  
Author(s):  
Valentin Petrov ◽  
Frank Noack ◽  
Fabian Rotermund ◽  
Mitsuhiro Tanaka ◽  
Yukikatsu Okada
Keyword(s):  
Sum Frequency Generation ◽  
Femtosecond Pulses ◽  
Sum Frequency ◽  
Frequency Generation

scholarly journals Non-collinear sum-frequency generation of femtosecond pulses in a micro-structured β-BaB_2O_4 crystal

2008 ◽  
Vol 16 (22) ◽  
pp. 18109 ◽  
Author(s):  
Carolina Romero ◽  
Javier R. Vázquez de Aldana ◽  
Cruz Méndez ◽  
Luis Roso
Keyword(s):  
Sum Frequency Generation ◽  
Femtosecond Pulses ◽  
Sum Frequency ◽  
Frequency Generation

Temperature Dependence of the Air/Water Interface Revealed by Polarization Sensitive Sum-Frequency Generation Spectroscopy

2018 ◽  
Author(s):  
Daniel R. Moberg ◽  
Shelby C. Straight ◽  
Francesco Paesani
Keyword(s):  
Temperature Dependence ◽  
Low Frequency ◽  
Potential Energy Function ◽  
Md Simulations ◽  
Sum Frequency Generation ◽  
Water Molecules ◽  
Water Interface ◽  
Sum Frequency ◽  
Air Water Interface ◽  
Frequency Generation

<div> <div> <div> <p>The temperature dependence of the vibrational sum-frequency generation (vSFG) spectra of the the air/water interface is investigated using many-body molecular dynamics (MB-MD) simulations performed with the MB-pol potential energy function. The total vSFG spectra calculated for different polarization combinations are then analyzed in terms of molecular auto-correlation and cross-correlation contributions. To provide molecular-level insights into interfacial hydrogen-bonding topologies, which give rise to specific spectroscopic features, the vSFG spectra are further investigated by separating contributions associated with water molecules donating 0, 1, or 2 hydrogen bonds to neighboring water molecules. This analysis suggests that the low frequency shoulder of the free OH peak which appears at ∼3600 cm−1 is primarily due to intermolecular couplings between both singly and doubly hydrogen-bonded molecules. </p> </div> </div> </div>

Bulk Contributions Modulate the Sum-Frequency Generation Spectra of Interfacial Water on Model Sea-Spray Aerosols

2018 ◽  
Author(s):  
Sandeep K. Reddy ◽  
Raphael Thiraux ◽  
Bethany A. Wellen Rudd ◽  
Lu Lin ◽  
Tehseen Adel ◽  
...  
Keyword(s):  
Single Layer ◽  
Sum Frequency Generation ◽  
Second Order ◽  
Interfacial Structure ◽  
Sea Spray ◽  
Third Order ◽  
Systematic Analysis ◽  
Sum Frequency ◽  
Structure Of Water ◽  
Frequency Generation

Vibrational sum-frequency generation (vSFG) spectroscopy is used to determine the molecular structure of water at the interface of palmitic acid monolayers. Both measured and calculated spectra display speci c features due to third-order contributions to the vSFG response which are associated with nite interfacial electric potentials. We demonstrate that theoretical modeling enables to separate the third-order contributions, thus allowing for a systematic analysis of the strictly surface-sensitive, second-order component of the vSFG response. This study provides fundamental, molecular-level insights into the interfacial structure of water in a neutral surfactant system with relevance to single layer bio-membranes and environmentally relevant sea-spray aerosols. These results emphasize the key role that computer simulations can play in interpreting vSFG spectra and revealing microscopic details of water at complex interfaces, which can be difficult to extract from experiments due to the mixing of second-order, surface-sensitive and third-order, bulk-dependent contributions to the vSFG response.

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