In recent years, with the rapid development of ultra-high speed, ultra-large capacity, ultra-long distance direction, and large gain bandwidth optical fiber communication technology. Dense wavelength division multiplexing system DWDM has become the mainstream of technology in optical fiber transmission systems. Fiber amplifier, one of the core devices of DWDM system, has developed rapidly in its application. This is mainly due to the fact that the fiber amplifier has sufficient gain bandwidth, and its combination with WDM technology can quickly and easily expand the communication capacity of the existing optical cable system and extend the relay distance. At present, there are three main types of optical amplifier technology: rare earth-doped optical amplifiers (such as erbium-doped fiber amplifier EDFA, praseodymium-doped fiber amplifier PDFA, thulium-doped fiber amplifier TDFA, etc.); semiconductor optical amplifier (SOA, etc.); nonlinear effect optical amplifier ( Raman amplifier, Brillouin amplifier, etc.). The mainstream of optical amplifiers is erbium-doped fiber amplifier (EDFA), which uses erbium-doped fiber as the gain medium and uses 980nm and 1480nm pumps as the pump light source to reverse the number of Er3 + particles. The incident of signal light causes the metastable Er3 + particles to be stimulated to radiate, resulting in signal amplification. There is a broad emission peak at 1525nm-1565nm. EDFA is applicable to C-band and L-band. Can amplify multiple wavelengths or channels simultaneously. Because it has the characteristics of rate transparency, large gain, large bandwidth, low noise, high power and so on. This makes it an ideal optical amplifier for low-loss windows in optical communications. From the perspective of application, EDFA has single wavelength and multiple wavelengths. In recent years, the miniaturized and arrayed EDFA has become a development trend.
WSEE's erbium-doped fiber amplifier EDFA and erbium-ytterbium co-doped fiber amplifier EYDFA have served the broadcasting and television, telecommunications and scientific research-grade optical fiber communications markets for many years. The radio and television market occupies the main market share. With the increase of investment in R & D in recent years, modular EDFA has become the core research object of Wanshuo's technical team. At present, the technology is very mature types are MSA FGA fixed gain EDFA module, MSA Gain block pure light fixed gain EDFA
module, VGA variable gain EDFA module; ultra-small specifications are XFP EDFA module, SFP EDFA module. And provide high-power EYDFA module, high-power EDFA module customization service. Through cost advantages, module stability and reliability. Provide a one-stop solution for domestic and foreign customers, customers only need simple packaging. You can get high-quality and cheap products.
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