With the optical fiber communication investment direction by the communications backbone, metropolitan area network, local area network, private network to FTTP, FTTH direction.FTTH core optical device - optical splitter market spring also will come, the market demand Expansion, domestic and foreign optical device manufacturers unanimously optimistic about this market. There are two types of optical splitter to meet the needs of the spectrum: one is the traditional optical passive device manufacturers use the traditional pull cone coupler process to produce the fused tap fiber splitter (Fused Fiber Splitter), a Based on optical integration technology to produce planar optical waveguide splitter (PLC Splitter), the two devices have their own advantages, users can use the occasion and the different needs of the rational use of these two different types of Spectral devices, the following two devices for a brief introduction for reference.
Fused Fiber Splitter Fused Fiber Splitter
Melt pull cone technology is two or more fibers bundled together, and then in the pull cone machine melt stretching, and real-time monitoring of the spectral ratio changes, the splitting ratio reaches the end of the melt after stretching, one end of a fiber The other cut off) as the input, the other end for multiple output. The current mature pull cone process can only pull 1 × 4 the following. 1 × 4 or more devices, with a number of 1 × 2 connected together. And then packaged as a whole in the splitter box.
The main advantages of this device are (1) pull cone coupler has more than 20 years of history and experience, many of the equipment and process just follow it, the development of only a few hundredths of PLC or even a few hundredths 2) Raw materials are available only in quartz substrates, fiber optics, heat shrink tubing, stainless steel tubing and less glue, for a total of no more than one dollar, while machines and instruments cost less for depreciation, 1 x 2,1 x 4 Low-cost channel splitters are low cost. (3) spectral ratio can be monitored in real time according to need, you can create unequal splitters.
The main shortcomings are (1) loss of light wavelength sensitivity, generally based on wavelength selection devices, which triple play process is a fatal flaw, because the three-in-one transmission of optical signals are 1310nm, 1490nm, 1550nm and other Wavelength signal.