Laser Wavelength
Laser Wavelength - Related Videos
01:33
Synergistic Photobiomodulation with a Dual-Wavelength Laser in an In Vitro Disease Model
0 Views •
2025
Divide the transwell system into five groups that undergo various treatments.The first group serves as the control and consists of a co-culture of neuroblastoma and microglia cells.In the second group, treat the co-culturer with fibrillar β-amyloid (fAβ) alone. fAβ induces damage in neuroblastoma cells.In the third group, treat neuroblastoma cells with an 808-nanometer laser, then co-culture them with untreated microglia.The laser reduces oxidative stress, improving neuronal survival.In the...
02:32
The de Broglie Wavelength
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2020
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
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.
08:41
Single Wavelength Shadow Imaging of Caenorhabditis elegans Locomotion Including Force Estimates
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Cited by 2 •
2014
The technique presented here measures the path of freely swimming microscopic species using single wavelength exposure. C. elegans are used to demonstrate shadow imaging as an inexpensive alternative to costly microscopes. This technique can be adapted to accommodate various orientations, environments and species to measure direction, speed, acceleration and forces.
08:16
Method for the Assessment of Effects of a Range of Wavelengths and Intensities of Red/near-infrared Light Therapy on Oxidative Stress In Vitro
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Cited by 11 •
2015
Non-coherent Xenon light was passed through narrow-band interference and neutral density filters to deliver light of varying wavelength and intensity to cultured cells. This protocol was used to assess the effects of red/near-infrared light therapy on production of reactive species in vitro: no effects were observed using the tested parameters.
FAQs
Photon energy increases as wavelength becomes shorter, following E = hc/λ. This difference changes how strongly light can drive interactions with biological matter and helps determine whether an application favors imaging, spectroscopy, tissue processing, or treatment. Selecting wavelength alongside the intended biological effect therefore supports better control over spatial precision and limits unwanted photochemical or thermal responses.
Tissue composition, absorption, and scattering determine how far light penetrates and how its energy is distributed. A wavelength that travels through tissue differently from another may produce a different balance between surface interaction and deeper reach. Considering these properties helps bioengineers match light delivery to the desired measurement or intervention while reducing unintended effects in surrounding tissue.
Changing the wavelength changes both photon energy and the way tissue interacts with the light. Consequently, one wavelength may support controlled fluorescence imaging or spectroscopy, whereas another may be better suited to photothermal treatment, tissue processing, or optogenetic stimulation. The relevant outcome depends on how absorption, scattering, and penetration combine in the biological system.
Selection should begin with the intended function, such as imaging, spectroscopy, treatment, tissue processing, or optogenetic stimulation. Researchers then consider tissue composition, absorption, scattering, penetration depth, and photon energy. Balancing these factors can improve signal quality or treatment selectivity while helping limit unwanted thermal or photochemical effects, making wavelength choice a central part of experimental design.
For fluorescence imaging and spectroscopy, wavelength selection affects how light interacts with the biological sample and can influence the quality of the resulting signal. A suitable choice can support controlled measurement while accounting for tissue absorption, scattering, and penetration. In bioengineering, this helps researchers obtain more useful optical information without treating wavelength as an isolated instrument setting.
These applications use wavelength selection to control different biological effects. Photothermal treatment and tissue processing depend on directing light interactions toward the intended material or tissue, while optogenetic stimulation uses light to influence biological systems. Choosing appropriately can improve spatial precision and selectivity and reduce unwanted thermal or photochemical effects during bioengineering procedures.