Fused Taper Fiber Splitters PK Planar Waveguide Splitter

There are two types of optical splitter to meet the need of spectral: a traditional optical passive device manufacturers to use the traditional tapered coupling process to produce fused taper fiber splitters (Fused Fiber Splitter), abased optical integration technology to produce a PLC splitter Both devices have their own advantages, according to different occasions and needs, a reasonable selection of these two different types of spectrophotometric device, the following twokinds of devices make a brief introduction for your reference.

Fused Fiber Splitter

Fused technology will be two or more fibers tied together, and then tapered on the melting stretch, and real-time monitoring of the splitting ratio changes, the splitting ratio to meet the requirements after the end of melt stretch one end to retain an optical fiber (the rest cut off) as input, the other end of the multi-output terminal. Mature pull cone technology can only pull the 1 × 4. 1 × 4 above the device, with more than 1 × 2 are connected together. Then the overall package in the splitter box, its advantages and disadvantages are analyzed as follows:

1, the main advantages:

(1) of the tapered coupler than 20 years of history and experience, many devices and processes only need to follow it, and development funds only a few tenth of the PLC and even a few hundredth, we do you can buy the core components, the development of the cost of almost.

(2) quartz plate, fiber, heat-shrinkable tube, stainless steel pipe, and less plastic raw material only readily available, a total of not more than one U.S. dollars investment in machinery and equipment less depreciation expense, 1 × 2,1 × 4 low-channel splitter low cost.

(3) The splitting ratio can be necessary real-time monitoring, you can create sub-ranging splitter.

2, the main disadvantages:

(1) sensitive to loss of light wavelength, generally according to the wavelength selection device, which is the fatal flaw in the triple-play using the process, because the optical signal in the triple-play transmission 1310nm, 1490nm, 1550nm, such as multiple wavelength signals.

(2) poor uniformity, 1X4 nominal maximum difference of about 1.5dB, 1 × 8 more than the difference between the greater and do not ensure uniform splitting, which may affect the overall transmission distance.

(3) the insertion loss varies with temperature changes in volume (TDL)

(4) multi-channel splitter (such as 1 × 16,1 × 32) of the volume is relatively large, the reliability will reduce the installation space is limited.

PLC Optical Power Splitter

Planar optical waveguide technology is the optical waveguide branch devices with semiconductor process, the function of the shunt on the chip, to achieve the above shunt up to 1x32 on a chip, the chip at both ends, respectively, coupled to encapsulate the input and outputend multi-channel fiber array.Fiber Optic Tester

1, the main advantages:

(1) wear and tear on the transmission wavelength of light is not sensitive to meet the needs the transmission of different wavelengths.

(2) spectrophotometric uniform, the signal can be assigned to the user.

(3) The compact structure, small size, can be installed directly in a variety of transfer of the box, without specially designed to stay a great deal of installation space.

(4) single device shunt channel can reach more than 32.

(5) multi-channel, low cost, points more and more large ones, the more obvious cost advantage.

2, the main disadvantages:

(1) complex device fabrication process, high technical threshold, the current chip monopolized by several foreign companies, domestic enterprises to be able to the production of large quantities of packaging and only a small few.

(2) relative to the higher cost of fused cone splitter, especially in the low-channel splitter at a disadvantage.

Available in the market pattern analysis

From the existing market the finished product of the optical splitter, are broadly similar, on the whole can be divided into monomer and a rack of two major categories:
From the package: monobloc roughly the same, but in the size difference, is in line with their own characteristics and the foregoing description; the ideas of the PLC of the Splitter in the package are broadly similar to the pursuit of the small size, which is in line with its ownsmaller form factor; while the volume of fused biconical taper fiber optic splitter, the installation should be considered in the wiring box placed in space and installation;

Rack of the company's products are more or less reflects the characteristics of the respective package, a direct extension of the ODF optical wiring unit, similar to fiber-optic wiring box; which the adapter installation location front, rear; installation with a fixed installation location, such as standard 19 "rack mount; slot high density modular package.

2 From the installation environment: the combination of FTTH solutions of view, the monomer style splitter is mostly used in the terminal small-capacity optical distribution and location are generally in the light wiring box or cabinet, and now some or new buildings, the weak wells or public space to install the wiring box or cabinet is very narrow, so the size of the wiring box or cabinet will not be great, so that space and installation location is very limited, the appearance will not have too many requirements, the size of the device should be the focus. Rack is used for ODF cabinet or rack, more often the bigger capacity of the fiber fused with, in the process of implementation of the project, more focus should be high-density, large capacity, easy operation, convenient management.

3, from the performance comparison: Both devices have their own advantages in price and performance, two kinds of technology are escalating, and continue to overcome their own shortcomings. Pull the cone splitter is to solve the problem of one-off tapered to a small number and poor uniformity; waveguide splitter is also reducing costs to make unremitting efforts, the two devices in more than 1X8 costs have almost the same, with the sub-channels of the planar waveguide splitter better prices. How to use these two devices, the key from the use situations and user needs to consider. In size and wavelength of light is not very sensitive applications, especially in less shunt, more affordable choice of a tapered optical splitter, such as independent data selection 1310nm tapered splitter TV Video Network Select a the 1550nm tapered splitter; in the triple play, FTTH optical transmission of multiple wavelengths and users more occasions should be used in the waveguide splitter.