This section provides an overview for fiber amplifiers as well as their applications and principles. Also, please take a look at the list of 9 fiber amplifier manufacturers and their company rankings.
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A fiber amplifier (optical fiber amplifier) is used to amplify optical signals in an optical fiber to compensate for attenuation caused by transmission or distribution of optical signals during propagation.
Existing methods for amplifying optical signals involve electrically amplifying the signal with semiconductors, etc., then reconverting it to light and re-transmitting it.
In contrast, fiber amplifiers amplify the optical signal itself directly in the optical fiber.
Fiber amplifiers are used in optical communications using optical fibers.
In particular, amplification of optical signals using rare earth element-doped fiber has high output power and can also amplify optical signals with high modulation frequencies and wavelength multiplexing, which is not possible with electrical amplification using semiconductors, and thus can handle optical signals with large amounts of information.
For this reason, fiber amplifiers are used in ultra-long-haul relay systems, optical multi-distribution systems, optical frequency multiplexing systems, and other applications in optical communications.
Fiber amplifiers are device that amplifies optical signals using rare earth doped fiber.
First, rare earth ions are excited by a pump LD, which triggers an input signal light, causing an induced emission that amplifies the optical signal.
Other components include a WDM coupler that aligns the input signal light with the pump light and an optical isolator that prevents the amplified light from oscillating.
By changing the type of rare earth ions used for doping and the material of the optical fiber, it is possible to amplify light in different wavelength bands.
Pr ions can be used for amplification in the 1.3 μm band, Er ions in the 1.5 μm and 0.85 μm bands, Tm ions in the 1.4 μm and 2 μm bands, and Yb ions in the 1.0 μm band.
In addition, fluoride fibers are used for amplification in the 1.3-μm, 1.4-μm, and 0.85-μm bands, etc., instead of quartz fibers.
*Including some distributors, etc.
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