Optical Parametric Oscillator
Optical Parametric Oscillator - Related Videos
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Cited by 13 •
2014
We describe the reliable generation of non-Gaussian states of traveling optical fields, including single-photon states and coherent state superpositions, using a conditional preparation method operated on the non-classical light emitted by optical parametric oscillators. Type-I and type-II phase-matched oscillators are considered and common procedures, such as the required frequency filtering or the high-efficiency quantum state characterization by homodyning, are detailed.
09:10
Fabrication and Testing of Microfluidic Optomechanical Oscillators
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Cited by 10 •
2014
Parametric optomechanical excitations have recently been experimentally demonstrated in microfluidic optomechanical resonators by means of optical radiation pressure and stimulated Brillouin scattering. This paper describes the fabrication of these microfluidic resonators along with methodologies for generating and verifying optomechanical oscillations.
02:11
Selective Manipulation of Theta Oscillations in a Mouse Model
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2025
This video demonstrates a protocol to modulate theta oscillations in a genetically engineered mouse model with light-sensitive ion channels in its GABAergic medial septum neurons. By delivering light pulses to the hippocampus, the protocol aims to synchronize neuronal activity and generate theta oscillations, which are recorded as local field potentials.
01:30
Parametric Surfaces
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2026
A parametric surface in three-dimensional space is defined through a vector-valued function\begin{equation*}\mathbf{r}(u, v) = x(u, v)\mathbf{i} + y(u, v)\mathbf{j} + z(u, v)\mathbf{k}\end{equation*}where u and v are parameters within a specified domain D in the uv-plane. The functions x(u, v), y(u, v), and z(u, v) define the coordinates of points on the surface. As u and v vary over D, the position vector r(u, v) traces a continuous surface in space. This parametric representation is essential...
02:39
In Vitro Recording of Theta Oscillations in the Mouse Hippocampus
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2025
This video demonstrates the recording of rhythmic neuronal network activity, also known as theta oscillations, in an isolated hippocampus. Electrodes are inserted into various layers and spatial positions to detect and analyze theta oscillations. This shows the unique neuronal compositions and the connectivity of the neuronal network across different layers of the hippocampus.
FAQs
The nonlinear optical crystal uses energy from the high-intensity pump beam to generate two lower-energy optical fields, known as the signal and idler. Their wavelengths are linked through parametric amplification rather than ordinary absorption and re-emission. This energy-sharing mechanism allows the output to cover wavelengths that are not directly available from the original pump laser.
Phase matching keeps the interacting optical waves synchronized as they propagate through the nonlinear crystal, allowing efficient parametric amplification. Optical feedback then returns generated light through a resonant cavity so amplification can continue over repeated passes. If these conditions are not satisfied together, the generated fields cannot sustain the oscillation required for stable output.
The generated signal and idler fields can occupy different wavelength regions while remaining connected to the pump through the parametric process. Adjusting the conditions that support phase matching changes which wavelengths are amplified and sustained by the cavity. This tunability lets investigators select illumination suited to a particular molecular signal, fluorescence measurement, or imaging contrast.
A fixed-wavelength laser supplies illumination within a limited spectral choice, whereas an Optical Parametric Oscillator can provide adjustable visible or infrared excitation. That flexibility helps researchers match illumination to molecular features and reduce reliance on a single contrast mechanism. In biological studies, the result can be more targeted fluorescence detection or improved sensitivity to vibrational information.
Researchers first select an output wavelength appropriate for the intended measurement, then direct the tunable illumination into a fluorescence, vibrational, or nonlinear microscopy arrangement. Detection is performed at the resulting molecular or structural signal. The selected wavelength determines which aspects of cellular composition, tissue organization, or biological dynamics become most strongly represented in the measurement.
OPO wavelength flexibility is especially useful when a study requires more than one type of optical contrast. Fluorescence spectroscopy can examine emitted signals, vibrational imaging can probe molecular composition, and nonlinear microscopy can reveal cellular or tissue features. Across these applications, adjustable visible or infrared excitation supports investigations of structure and dynamic biological processes.