Fiber optic splitteris a passive element of an optical fiber signal into a plurality of optical signals output. Its role is very simple and a main light source is divided the optical light into N-1 parts via splitter, and then fed out,or N-1 copies of the optical path synthesis beam of the main light source through the fiber optic splitter, and then recovered (also called reversible transfer).

The fiber optic splitter is divided two kinds: one is fused fiber splitter (FBT Coupler splitter); the other is planer light wave circuit (PLC splitter). Former is the most mature, the most convenient method. Domestic CATV network applications in the vast majority of FBT splitter. The optic splitter has a high optical indicators, stable and reliable performance, its applications has been widely recognized through many years. The later optical splitter with low IL (insertion) loss, low PDL (polarization) loss, compact design, high return loss, insensitive wavelength, high reliability and stability, it is widely used in PON architecture all kinds of FTTX project. The product complies with and better than the Telcordia GR1209/1221 standard. Ingellen supplies meet the demand for a variety of engineering design.

Both devices Performance Comparison
1.Operating wavelength
The FBT splitter process tapered fiber mode field changes, the need to adjust the process monitoring window, the operating wavelength is adjusted to 1310nm, 1490nm, 1550nm operating wavelength. The
PLC splitter is not sensitive to the working wavelength, also be said that the insertion loss of the light of different wavelengths are very close, typically working wavelength reaches 1260 to 1650nm, covering various PON standards at this stage all the necessary possible to use a wavelength as well as a variety of test monitoring equipment needed wave.

2.Spectral uniformity
The FBT splitter ratio can be controlled according to require on-site, if you went uniformity good, you need to go through the accurate calculation of pairing. The ratio variable is the best advantage of the device. The PLC splitter ratio is determined by the design of the mask. Currently the ratio is uniform, due to the high consistency of the semiconductor process, the uniformity at the channel of the device is very good, and keep the consistency of the size of the output light.

3.Cost
The major cost of the PLC equipment cost and material cost (chip and an optical fiber array). The device production equipment is expensive. Tapered device cost is the cost of the labor costs and
the pass rate. Low raw material costs.

4.Temperature Dependent Loss
TheFBT splitterusual working temperature in the -5 to +75 ° C, insert loss insertion loss varies with temperature variation, particularly in the low temperature conditions (<-10 ° C), the insertion loss of unstable. ThePLC splitterworking temperature in the -40 ~ +85 ℃, insert a small amount of loss varies with temperature changes.

Reliability Planar waveguide device and pull the cone splitter, reliability occupies a distinct advantage, mainly in the following three points: (1) the point of failure: the planar waveguide devices theoretically only two between the chip and two fiber optic array a handover surface exists in the point of failure, and 2N-3 1 × N pull pyramidal splitter fault point (N-1 unit, the N-2 splice points). An increase in the point of failure, reliability will decrease Device selection, we suggest the following: the need to use, if only the transmission of a single wavelength or dual wavelength transmission tapered devices can be selected from a cost perspective, if the broadband PON technology transfer, taking into account the future expansion and monitoring needs preferred planar waveguide devices. A low shunt device can choose a tapered device, the the score road device (1 ×8 ) preferred planar waveguide device (1 × 4).

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