Multifunctional Stents76mm LED Illuminated Light Track Stand,ZJ-602
Stand Throat Depth: 132mm
Coarse/Fine Focus Type: Coarse Focus
Illumination Type: LED Coaxial Transmitted Light
Bottom Illumination: Bright Field
Net weight: 4.67kg (10.30lbs)
Industry product knowledge
There are several different physical mechanisms that can be used to amplify a light signal, which correspond to the major types of optical amplifiers. In doped fiber amplifiers and bulk lasers, stimulated emission in the amplifier's gain medium causes amplification of incoming light. In semiconductor optical amplifiers (SOAs), electron-hole recombination occurs. In Raman amplifiers, Raman scattering of incoming light with phonons in the lattice of the gain medium produces photons coherent with the incoming photons.
Parametric amplifiers use parametric amplification.
Doped fiber amplifiers
Doped fiber amplifiers (DFAs) are optical amplifiers that use a doped optical fiber as a gain medium to amplify an optical signal. They are related to fiber lasers. The signal to be amplified and a pump laser are multiplexed into the doped fiber, and the signal is amplified through interaction with the doping ions. The most common example is the Erbium Doped Fiber Amplifier (EDFA), where the core of a silica fiber is doped with trivalent erbium ions and can be efficiently pumped with a laser at a wavelength of 980 nm or 1,480 nm, and exhibits gain in the 1,550 nm region.