Optical Transmission
Optical Transmission - Related Videos
09:43
Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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Cited by 11 •
2017
We demonstrate the transmission of multiple independent signals through a multimode fiber using wavefront shaping employing a single spatial light modulator. By modulating the wavefront for each signal individually, spatially separated foci are transmitted. Potential applications are multiplexed data transfer in communications engineering and endoscopic light delivery in biophotonics.
09:23
Using Extraordinary Optical Transmission to Quantify Cardiac Biomarkers in Human Serum
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Cited by 1 •
2017
This work describes a nanoimprinting lithography method to fabricate high-quality sensing arrays that work on the principle of extraordinary optical transmission. The biosensor is low-cost, robust, easy to use, and can detect cardiac troponin I in serum at clinically relevant concentrations (99th percentile cutoff ∼10-400 pg/mL, depending on the assay).
13:39
Optical Trapping of Nanoparticles
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Cited by 7 •
2013
The following setup approach details low power optical trapping of dielectric nanoparticles using a double-nanohole in metal film.
08:31
Three-dimensional Optical-resolution Photoacoustic Microscopy
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Cited by 27 •
2011
Optical-resolution photoacoustic microscopy (OR-PAM) is an emerging technology capable of imaging optical absorption contrasts in vivo with cellular resolution and sensitivity. Here, we provide a visualized instruction on the experimental protocols of OR-PAM, including system configuration, system alignment, typical in vivo experimental procedures, and functional imaging schemes.
05:43
Preparing Retinal Organoid Samples for Transmission Electron Microscopy
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Cited by 1 •
2024
This protocol provides an optimized and elaborate preparation procedure for retinal organoid samples for transmission electron microscopy. It is suitable for applications that involve the analysis of synapses in mature retinal organoids.
FAQs
Transmission can vary with wavelength because biological materials and device materials do not interact with every portion of the optical spectrum in the same way. Absorption and scattering may increase or decrease as wavelength changes, altering how much signal reaches a detector. Selecting a suitable wavelength therefore helps preserve signal quality when designing imaging, sensing, or fiber-optic systems.
A change in refractive index at an interface can increase reflection and reduce the portion of incident light that continues through the system. This makes interfaces important in optical components and biological samples, where mismatched materials can weaken the transmitted signal. Managing these effects supports more efficient movement of optical energy and improves measurement accuracy.
Absorption removes part of the optical signal as light travels through a material, whereas scattering redirects light away from its original path. Both processes can attenuate transmission, but they affect signal behavior differently. In biological materials, considering both mechanisms is essential because redirected or weakened light can reduce image clarity and complicate interpretation of measured structures or physiological processes.
Researchers can improve transmission by considering wavelength, refractive index, absorption, reflection, and scattering together rather than treating material transparency as the only criterion. This analysis helps guide the selection and arrangement of materials in fiber-optic devices, biosensors, microscopy systems, and imaging methods. The resulting design can preserve more of the optical signal and support more reliable measurements.
In fiber-optic devices, efficient transmission helps carry optical signals through the system with less loss from reflection, absorption, or scattering. In biosensors, the transmitted signal can be used to detect chemical changes or other biological information. Controlling transmission in both cases supports stronger signals and improves the accuracy with which biological conditions are measured.
Microscopy and imaging systems depend on controlled transmission to deliver and collect light from biological samples. Tissue and other complex biological materials may attenuate or redirect the signal, which can reduce the clarity of observed structures. Understanding these effects helps researchers design systems that measure biological structures and physiological processes with greater accuracy.