Mid-infrared Photonics
Mid-infrared Photonics - Related Videos
09:39
In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
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Cited by 5 •
2013
We describe a method for in-situ tapering of As2S3 fibers to achieve efficient mid-infrared supercontinuum generation. By tapering while monitoring the supercontinuum’s spectrum, the spectral width can be maximized for a fiber taper. In-situ fiber tapering can be applied to optimize the performance of other fiber-based devices.
01:31
Ed through Mid-point Method
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2024
At point A, the price is $6 for 120 units. Moving to point B, the price increases to $9, resulting in a decrease in quantity demanded to 80 units. This translates to a 50 percent increase in price and a 33.33 percent decrease in quantity, leading to a price elasticity value of 33.33/50 or 0.67. Conversely, moving from point B to A, entails a 33.33 percent decline in price and a 50 percent increase in quantity. This yields a price elasticity of 50/33.33 or 1.5. This discrepancy arises from the...
04:32
Two-Photon In Vivo Imaging of the Mouse Retina
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2025
Source: Wang, Z., et al. Transpupillary Two-Photon In Vivo Imaging of the Mouse Retina. J. Vis. Exp. (2021).This video demonstrates a technique for in vivo retinal imaging using two-photon microscopy. Anesthetized mice are prepared for imaging by securing their heads, Applying eye lubricant, and placing a coverslip over the eye. Retinal ganglion cells (RGCs) expressing fluorescent proteins are first visualized using epifluorescence for alignment. Finally, two-photon imaging is employed,...
10:12
Near-infrared Fluorescence Imaging of Abdominal Aortic Aneurysms
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2023
Source: Arvin H. Soepriatna1, Kelsey A. Bullens2, and Craig J. Goergen1 1 Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 2 Department of Biochemistry, Purdue University, West Lafayette, Indiana Near-infrared fluorescence (NIRF) imaging is an exciting optical technique that utilizes fluorescent probes to visualize complex biomolecular assemblies in tissues. NIRF imaging has many advantages over conventional imaging methods for noninvasive imaging of diseases.
03:18
Two-Photon Microscopy for Monitoring Calcium Dynamics in Mouse Retinal Cone Photoreceptors
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2025
Source: Kulkarni, M. et al. Imaging Ca2+ Dynamics in Cone Photoreceptor Axon Terminals of the Mouse Retina. J. Vis. Exp. (2015)This video demonstrates the use of two-photon microscopy to monitor calcium dynamics in cone photoreceptors of a transgenic mouse retina. It outlines the steps for preparing retinal slices, imaging FRET-based calcium biosensors, and analyzing fluorescence changes to quantify calcium levels under background illumination and light stimulation.
FAQs
Molecular vibrations create distinctive absorption signatures in the mid-infrared, allowing measured interactions with light to provide chemically relevant information. This spectral behavior gives engineered systems a basis for distinguishing substances or monitoring composition rather than simply detecting overall intensity. The resulting capability supports chemical sensing, spectroscopy, and industrial process monitoring.
Materials and device structures must be selected to transmit or confine mid-infrared wavelengths efficiently. Their engineering determines how effectively light remains within a waveguide or interacts with other components during generation, modulation, and detection. Appropriate design therefore directly affects whether a system can deliver useful measurements for sensing, spectroscopy, imaging, or diagnostics.
Semiconductor lasers provide an important route for generating mid-infrared light, while nonlinear optical devices contribute additional ways to produce or manipulate photons. These technologies expand the available source and device designs beyond a single architecture. Their continued development, together with integrated photonic platforms, is helping engineering researchers pursue smaller and more sensitive systems.
A typical measurement path begins by generating photons, guiding them through an engineered structure, and modulating or directing them as needed before detection. The detected response can then be examined for the distinctive absorption signatures associated with molecular vibrations. This sequence links source, waveguide, device, and detector functions into a coordinated engineering workflow.
Its applications span chemical and environmental sensing, industrial process monitoring, thermal imaging, spectroscopy, and medical diagnostics. The same underlying photonic capabilities can therefore serve both analytical and imaging tasks. Engineers select the source, guiding structure, detector, and device configuration according to whether the system must monitor a process, identify chemical signatures, form images, or support diagnostic measurements.
Integrated photonic platforms combine mid-infrared functions into more compact device architectures, supporting efforts to reduce system size while increasing sensitivity. Their importance lies in bringing light generation, guidance, modulation, or detection closer together within engineered structures. This direction is particularly relevant for research systems that need practical form factors without abandoning spectroscopic or sensing capability.