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Showing 1 to 11 of 11 for “"degenerate four-wave mixing"”.
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Optical Limiting and Degenerate Four-Wave Mixing in Novel Fullerenes
Two experimental methods, optical limiting and degenerate four-wave mixing, are employed to study the nonlinear optical properties of various novel fullerenes structures. Optical limiting refers to decreased transmittance of a material with increased incident light intensity. Detailed measurements …
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Investigation of Degenerate Four -Wave Mixing and Polarization Spectroscopy for Quantitative Measurements in Combustion Environments
The application of DFWM and PS for quantitative concentration measurements was investigated experimentally by measuring lineshapes and signal intensities in well-characterized hydrogen/air flames. Resonances in the A2Sigma +-X2pi (0,0) band of hydroxyl (OH) were probed with both perturbative and …
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Nonlinear optical effects in nematic liquid crystals
… effects in nematic liquid crystals including degenerate four-wave mixing are presented. The optically induced Freedericksz transition which is essential for these effects is also described. Experimental investigations are performed using a homeotropically aligned MBBA thin film. Good agreement …
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The Generation and Detection of Squeezed Microwave Photons Realized using Traveling-Wave Parametric Amplifiers
… noise in applications spanning gravitational wave detection, biological microscopy, and quantum information science. In circuit quantum electrodynamics, Josephson parametric amplifiers play a crucial role in quantum-limited amplification and squeezed microwave generation. In this thesis, we …
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Broadband Squeezed Microwaves and Amplification with a Josephson Traveling-Wave Parametric Amplifier
… scientific breakthroughs from gravitational wave detection to biological microscopy enhancement. The generation of highly-squeezed states using superconducting amplifiers is a foundation for quantum optics and quantum metrology in the microwave domain. In superconducting circuits, researchers …
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Two-dimensional ultrafast pulse shaping and its application to coherent control and spectroscopy
… control of propagating lattice excitations and degenerate four-wave mixing spectroscopy. Pulse shaping in two dimensions is achieved by manipulating the spectral components of ultrashort laser pulses within many horizontal slices of the pulse. Each horizontal slice is independently shaped by …
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Geometric manipulation of light : from nonlinear optics to invisibility cloaks
… two different manipulations of electromagnetic waves governed by macroscopic Maxwell's equations. One is frequency conversion of such waves using small intrinsic material nonlinearities. We study conversion of an input signal at frequency w1 to frequency Wk due to second or third harmonic …
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Holographic laser resonators
… a given beam can be produced by the process of degenerate four-wave mixing inside a gain medium. In this scheme two mutually coherent beams overlap within a population inverted region of a laser amplifier and the subsequent interference pattern between them spatially hole burns a grating into …
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Enhancing the Third-Order Nonlinear Optical Properties of Porphyrins and Molecular Wires
… azobenzene oligomers were investigated using degenerate four wave mixing (DFWM) with 100 fs laser pulses. To measure the NLO of ITO thin films, A DFWM method for measuring thin films on thick substrates was refined for the characterization of films less than 100 nm thick and applied to ITO …
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Power scaling and nonlinear conversion in fiber-based sources at novel wavelengths
… fiber sources is limited to specific wavelengths regions by typical used rare-earth dopants such as ytterbium (Yb) around 1 µm, erbium (Er) with emission around 1.55 µm, thulium (Tm) with a gain emission from 1.7 to 2.0 um, and holmium (Ho) with an emission from 2.05 to 2.1 µm. …
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Bandpass filters for unconstrained target recognition and their implementation in coherent optical correlators
… is simulated which is based on the non-degenerate four wave mixing (NDFWM) interaction in the photorefractive material bismuth silicon oxide (Bi12SiO20). Specifically, it is shown that variable bandpass filters can be implemented directly in the correlator by adjusting the relative …