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Monochromatic Filter

Lasers | Photonics Handbook®

Lasers | Photonics Handbook®

monochromatic.
Many applications are dependent on monochromaticity. For example, in telecommunications, several lasers at slightly offset wavelengths can transmit in
parallel streams of pulses down the same optical fiber without crosstalk. Real lasers are not perfectly monochromatic

eLP11-02-56  Coherent

eLP11-02-56 Coherent

…with a lowercost LED or super-luminescent LED (SLED)
as the fluorescence excitation source?
Many applications don't need the extreme monochromaticity and spatial
brightness of a laser, and a few instruments that use very wide-field illumination may be able to economize by using

LIT Lasers-LED NO2 Spectral-Brightness 1014.pdf

LIT Lasers-LED NO2 Spectral-Brightness 1014.pdf

…low-cost
filters made of colored glass are capable of extinction
ratios as high as 10X.
However, the need to enhance signal to noise via this
spectral discrimination has a significant impact on the
choice of light source - laser or LED.
Laser - a Monochromatic Source…

Forensic Lasers Meet Unique Challenges in Military Applications in Afghanistan and Stateside

Forensic Lasers Meet Unique Challenges in Military Applications in Afghanistan and Stateside

…simple filtered lamp, called an alternate light source (ALS), to using
a green laser. The number and quality of prints we obtained shot up dramatically with laser excitation."
The reasons for this difference are well documented. First, the laser has much higher monochromaticity

Laser Focus World - June 2018

Laser Focus World - June 2018

…Stokes-shifted fluorescence emission. The laser has a much sharper spectrum (that is, spectral width and slope) than the filter, so it's often better to work back from the filter. For example, many users often choose to excite a fluorochrome with a laser on the short-wavelength slope of the…