Near Infrared Laser
Near Infrared Laser - Related Videos
09:38
Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
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Cited by 4 •
2015
We describe the generation of far-infrared radiation using an optically pumped molecular laser along with the measurement of their frequencies with heterodyne techniques. The experimental system and techniques are demonstrated using difluoromethane (CH2F2) as the laser medium whose results include three new laser emissions and eight measured laser frequencies.
11:04
Control of Cell Geometry through Infrared Laser Assisted Micropatterning
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2021
The protocol presented here enables automated fabrication of micropatterns that standardizes cell shape to study cytoskeletal structures within mammalian cells. This user-friendly technique can be set up with commercially available imaging systems and does not require specialized equipment inaccessible to standard cell biology laboratories.
10:47
Whole-body Mass Spectrometry Imaging by Infrared Matrix-assisted Laser Desorption Electrospray Ionization (IR-MALDESI)
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Cited by 19 •
2016
A mass spectrometry imaging (MSI) source operated at atmospheric pressure was developed by coupling mid-infrared laser desorption and electrospray post-ionization. Exogenous ice matrix was used as the energy-absorbing matrix to facilitate resonant desorption of tissue-related material. This manuscript provides a step-by-step protocol for performing IR-MALDESI MSI of whole-body neonatal mouse.
08:11
Infrared Spectroscopy
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2023
Source: Vy M. Dong and Zhiwei Chen, Department of Chemistry, University of California, Irvine, CA This experiment will demonstrate the use of infrared (IR) spectroscopy (also known as vibrational spectroscopy) to elucidate the identity of an unknown compound by identifying the functional group(s) present. IR spectra will be obtained on an IR spectrometer using the attenuated total reflection (ATR) sampling technique with a neat sample of the unknown.
02:35
A Near-Infrared Photoimmunotherapy Technique to Treat Lung Cancer in a Murine Model
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2025
This video demonstrates a near-infrared photoimmunotherapy technique to treat lung cancer in an engineered mouse model exhibiting luciferase-expressing tumor cells. Upon injecting an antibody-photosensitizer conjugate (APC) that binds to specific antigens on the tumor cells, the mouse is exposed to near-infrared radiation, inducing photochemical changes in the APC and leading to necrotic death of the bound tumor cells. The effectiveness of the treatment is monitored by injecting luciferin, a...
FAQs
The optical cavity provides feedback that amplifies selected wavelengths after electrical energy or optical pumping creates a population inversion in the gain medium. Stimulated emission then reinforces radiation at those wavelengths, producing a narrow spectral bandwidth rather than a broad output. This mechanism gives engineers a controllable beam whose spectral selection supports communication, sensing, and processing tasks.
Wavelength, power, and pulse duration are key operating variables. Wavelength affects how radiation interacts with a material and how suitable the output is for fiber transmission or measurement. Power determines the available energy, while pulse duration influences processing outcomes. Engineers therefore match these parameters to the desired sensitivity, transmission behavior, or material-processing result.
Near infrared output lies just beyond the visible spectrum, creating engineering opportunities associated with its wavelength range. Its radiation can travel efficiently through optical fibers and interact selectively with many materials. These characteristics support fiber-optic communication and materials processing, while wavelength-dependent behavior also makes the source useful for spectroscopy, lidar, and machine vision.
For an engineering application, begin by identifying whether the goal is transmission, measurement, imaging, or material modification. Then select wavelength, power, and pulse duration according to the required fiber behavior, measurement sensitivity, or processing outcome. Finally, use the laser’s directional emission to deliver focused energy toward the intended optical path or target.
Their radiation can travel efficiently through optical fibers, and coherent, directional emission provides a controlled optical signal. Narrow spectral bandwidth also supports the use of selected wavelengths in the communication system. In engineering designs, these properties make the source suitable for carrying information through fiber links, with wavelength selection serving as an important performance consideration.
These applications benefit from controlled radiation with a selected wavelength, narrow spectral bandwidth, and directional emission. Wavelength choice affects measurement sensitivity, so engineers select operating conditions according to the sensing or imaging objective. The same laser platform can therefore support lidar, spectroscopy, or machine vision while maintaining a focused and spectrally defined output.
Power and pulse duration are central because they determine processing outcomes together with wavelength. Wavelength governs how the radiation interacts selectively with a material, while power and pulse duration set the operating conditions used to control the result. Engineers adjust these parameters when applying focused laser energy to precision materials-processing tasks.