Laser Diffusing Fiber
Laser Diffusing Fiber - Related Videos
10:32
Thermal Diffusivity and the Laser Flash Method
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2023
Source: Elise S.D. Buki, Danielle N. Beatty, and Taylor D. Sparks, Department of Materials Science and Engineering, The University of Utah, Salt Lake City, UT The laser flash method (LFA) is a technique used to measure thermal diffusivity, a material specific property. Thermal diffusivity (α) is the ratio of how much heat is conducted relative to how much heat is stored in a material. It is related to thermal conductivity (), how much heat is transferred through a material due to a temperature...
14:18
Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Cited by 2 •
2016
A protocol to detect and automate mode locking in a pre-adjusted nonlinear polarization rotation fiber laser is presented. The detection of a sudden change in the output polarization state when mode locking occurs is used to command the alignment of an intra-cavity polarization controller in order to find mode-locking conditions.
03:31
Diffusion and Osmosis - Concepts
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2019
Cell Membranes and Diffusion In order to function, cells are required to move materials in and out of their cytoplasm via their cell membranes. These membranes are semipermeable, meaning that certain molecules are allowed to pass through, but not others. This movement of molecules is mediated by the phospholipid bilayer and its embedded proteins, some of which act as transport channels for molecules that otherwise would not be able to pass through the membrane, such as ions and carbohydrates.
08:18
Diffusion and Osmosis - Student Protocol
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2019
Diffusion in Agar ExpandNOTE: In this exercise, you will be given agar containing an indicator chemical called phenolphthalein. When phenolphthalein is exposed to the normal alkaline conditions in the agar, it will look pink. But when it is exposed to neutral or acidic conditions, it changes from pink to clear. You will make different size and shaped agar cubes as a model for cells to study the impact of cell size and shape on diffusion rate. To make the first set of cells, measure out and cut...
01:48
Classification of Skeletal Muscle Fibers
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2019
Skeletal muscles continuously produce ATP to provide the energy that enables muscle contractions. Skeletal muscle fibers can be categorized into three types based on differences in their contraction speed and how they produce ATP, as well as physical differences related to these factors. Most human muscles contain all three muscle fiber types, albeit in varying proportions. Slow-Twitch Muscle Fibers Slow oxidative, muscle fibers appear red due to large numbers of capillaries and high levels of...
FAQs
Scattering features in the diffusing segment redirect energy outward as light travels through the fiber core. This redistribution changes the illumination from a sharply concentrated output into a more uniform profile across the selected region. In neural experiments, it can reduce localized intensity and lessen abrupt spatial differences in light exposure.
The chosen diffusing length or area determines where illumination is distributed, while scattering within that segment redirects light outward. Extending the region of diffusion can support broader tissue coverage than a single emission point. This controllable profile helps investigators match light delivery to experiments examining activity or responses across neural tissue.
Compared with a conventional fiber tip, a Laser Diffusing Fiber distributes illumination along a defined segment rather than concentrating it at one point. That difference reduces sharp spatial gradients and may expose a broader tissue region more evenly. The comparison matters when an experiment seeks regional circuit responses instead of highly localized stimulation or measurement.
In neuroscience, this optical approach can support optogenetic stimulation, photoinhibition, or fluorescence-based measurements. Its broader illumination profile allows researchers to examine neural activity, connectivity, or responses across larger tissue regions than an intensely localized output would address. The method therefore connects controlled light delivery with experiments on circuit-level organization and function.
Broader illumination can help experiments assess responses across neural tissue rather than focusing on a single sharply exposed location. Researchers can investigate circuit activity, neural connectivity, and tissue responses while limiting steep spatial differences in light intensity. Fluorescence-based measurements can also benefit when the study requires information from a defined area or extended region.
Laser light first travels through the fiber core to the diffusing segment, where scattering redirects energy outward. The resulting illumination profile is then used in neural tissue for stimulation, inhibition, or fluorescence-based measurement. Researchers can select this approach when the experiment requires controlled coverage across a defined length or area rather than a single concentrated point.