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What are some of the disadvantages and disadvantages of fused biconical multimode optical splitter?

date:2018-08-22 18:00

The fused tapered multimode optical splitter is two or more fiber bundle together, then melt in taper machine drawing, and real-time monitoring of optical divide ratio changes, the splitting ratio is required after the end of melt drawing, which is retained a fiber (the rest cut) as the input, the other end for multiple output end. At present, the mature cone drawing process can only pull under 1 x 4 at one time. 1 * 4 or more devices are connected together with a plurality of 1 * 2. The whole package is enclosed in the splitter box.
1., the main advantages are:
(1) pull cone coupler has more than 20 years of history and experience, many equipment and processes need to follow only, development funds only a few or even hundreds of PLC
(2) the quartz substrate, only raw materials readily available fiber, heat shrinkable tube, stainless steel tube and less glue, a total of not more than one dollar. The machine and equipment investment cost less depreciation, 1 x 2, 1 x 4 low channel splitter with low cost.
(3) the splitting ratio can be monitored in real time according to the requirement, and an unequal divider can be fabricated.
2., the main disadvantages are:
(1) loss sensitive to light, generally according to the wavelength selection devices, this one in three process is a fatal flaw, because the optical signal transmission in a network are 1310nm, 1490nm, 1550nm and other signal wavelength.
(2) uniformity is poor. Uniformity is the variation of insertion loss at each output of the splitter. 1X4 nominal maximum difference of about 1.5dB, 1 x 8 above difference is greater, can not ensure uniform spectrum, may affect the overall transmission distance.
(3) the insertion loss varies greatly with temperature (TDL); the insertion loss is the ratio of the output power of a port to the optical power at the input. Insertion loss is composed of two parts: one is additional loss, the other is splitting factor; the device has different splitting ratio and the insertion loss is different; therefore, there is no specific regulation in the standard.
(4) the multiplexer (such as 1 * 16 and 1 * 32) is larger in volume, lower in reliability, and limited in installation space.
The fused biconical taper multimode optical splitter has the advantages of low additional loss, low polarization dependent loss, good stability, dual working window, three working window, high wavelength isolation, small volume, and light splitting ratio

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