Is there any difference between laser near infrared and LED near infrared?
The advantage of laser light source is its good color and high energy. The wavelength of semiconductor laser is <10nm, which avoids the phenomenon of color channeling. The instrument using laser light source has good precision and multi-channel efficiency.
For near infrared fluorescence excitation and emission wavelengths are very close, only about 20nm, if you use LED as a light source near infrared instrument, must produce the excitation light color to croos - talk channeling phenomenon detection channel, because the LED spectral width in 50-80nm.
