Results 121 to 130 of about 40,871 (163)
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Homodyne surface second-harmonic generation
Optics Letters, 1995We demonstrate the application of the homodyne mixing technique to surface second-harmonic generation. The technique is shown to have advantages for improving the signal-to-noise ratio for background and detector-noiselimited experiments, for providing real-time measurement of the phase and magnitude of the surface susceptibility, and for ...
P, Thiansathaporn, R, Superfine
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1971
Abstract : Investigations are being conducted under the subject contract with the objective of producing high average powers at a wavelength of 0.532 microns, with a short pulse and high repetition frequency format. The program objectives are to be achieved by utilizing a high average power CW Nd:YAG laser combined with electro-optic Q-switching ...
Edward G. Erickson, James H. Boyden
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Abstract : Investigations are being conducted under the subject contract with the objective of producing high average powers at a wavelength of 0.532 microns, with a short pulse and high repetition frequency format. The program objectives are to be achieved by utilizing a high average power CW Nd:YAG laser combined with electro-optic Q-switching ...
Edward G. Erickson, James H. Boyden
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Diagrammatic representation of second harmonic generation
Applied Optics, 1988Application de la theorie electrodynamique des perturbations conduisant a une representation diagrammatique du ...
W E, Parry, R R, Syms
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"Cerenkov" configuration Second Harmonic Generation
Nonlinear Guided-Wave Phenomena Physics and Applications, 1989The use of the largest nonlinear coefficient d33 of LiNbO3 for second harmonic generation (SHG), first demonstrated with a guided wave phase-matched interaction suffering from poor field overlap integrals (1), has been considerably improved by the use of a Cerenkov type configuration : nonlinear polarization having a phase velocity greater than that of
M J. Li +2 more
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Squeezed states in second-harmonic generation
Optics Letters, 1983We consider the process of second-harmonic generation with the nonlinear crystal placed in a resonant cavity. Both the fundamental and the second-harmonic mode are shown to exhibit squeezing. An analysis is made for the general values of the ratio between the damping constants of the two modes.
L A, Lugiato, G, Strini, F D, Martini
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Modulational instability in second-harmonic generation
Optics Letters, 1995We show that the eigenmodes of the two-wave interaction in a dispersive quadratic medium are unstable with respect to periodic perturbations. This mechanism represents a novel kind of modulational instability that involves the spontaneous generation of sideband pairs around both the fundamental and the second-harmonic frequencies.
S, Trillo, P, Ferro
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Second Harmonic Generation in Powder Laser
CLEO/Europe Conference on Lasers and Electro-Optics, 1998A laser-like emission from powders of solid state luminophosphors was reported in a number of publications, see for example Refs. [1,2]. A dramatic narrowing of Nd emission line (4F3/2-4I11/2) in powders of Nd doped laser materials is observed when the pumping energy exceeds some critical threshold value.
M. A. Noginov +4 more
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Second-harmonic generation imaging of cancer
2014The last 30 years has seen great advances in optical microscopy with the introduction of sophisticated fluorescence-based imaging methods such as confocal and multiphoton laser scanning microscopy. There is increasing interest in using these methods to quantitatively examine sources of intrinsic biological contrast including autofluorescent endogenous ...
Adib, Keikhosravi +3 more
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Second Harmonic Generation in Optical Fibers
Optical Society of America Annual Meeting, 1990Intensive investigation has followed the surprising observation of self-organized second-harmonic generation (SHG) in optical fibers. It is now known that an alternating χ(2) grating has formed in the fiber. The grating grows by mixing of the fundamental and harmonic waves so SHG gratings can be formed quickly by seeding with a coherent second-harmonic
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Second-harmonic generation in AlGaAs nanoantennas
Photonics and Fiber Technology 2016 (ACOFT, BGPP, NP), 2016We demonstrate monolithic aluminum gallium arsenide (AlGaAs) optical nanoantennas for enhanced second harmonic generation (SHG) at telecom wavelengths. From measurements on nanocylinders of 400 nm height and varying radius pumped with femtosecond pulses delivered at 1554-nm wavelength, we estimated a peak conversion efficiency exceeding 10−5.
DE ANGELIS, Costantino +11 more
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