Location:Home > News > Company News
Small knowledge: fiber splitter

Hits:Updated:2016-11-14 13:11:56【Print】

Fiber splitter is used to achieve the energy of the shunt and the road of the device. It will be a fiber transmission of optical energy in accordance with the established proportion of the distribution of two or more optical fiber, or the number of optical fiber transmission of light energy into a fiber.
Main Specifications
(1) Insertion loss.
The insertion loss of the fiber splitter is the dB loss of each output relative to the input light, and its mathematical expression is: Ai = -10lg Pouti / Pin, where Ai is the insertion loss of the i-th output port; Pouti is The optical power of the i-th output port; and Pin the optical power value of the input terminal.
(2) additional loss.
The additional loss is defined as the sum of the optical powers of all output ports with respect to the number of DBs of input optical power loss. It is worth mentioning that, for optical fiber coupler, the additional loss is a reflection of the quality of the device manufacturing process indicators reflect the inherent loss of the device manufacturing process, the smaller the better loss is the quality of the production of the merits of the assessment indicators. While the insertion loss is only that the output power of each output port status, not only the inherent loss factor, but also taking into account the impact of spectral ratio. Therefore, different optical fiber couplers, the difference between the insertion loss and can not reflect the merits of device manufacturing quality. The additional losses for the 1 * N single-mode standard fiber splitter are shown in the following table: Number of shunts 2 3 4 5 6 7 8 9 10 11 12 16 Additional loss DB 0.2 0.3 0.4 0.45 0.5 0.55 0.6 0.7 0.8 0.9 1.0 1.2
(3) splitting ratio.
The splitting ratio is defined as the output power ratio of the output ports of the optical splitter. In the system application, the splitting ratio is determined according to the optical power required by the actual system optical node, and the appropriate splitting ratio (except the average distribution) The splitting ratio of the fiber splitter is dependent on the wavelength of the transmitted light. For example, an optical splitter has a 50:50 splitting ratio at the output of 1.31 μm, and a 70: 30 (The reason for this is because the optical splitter has a certain bandwidth, that is, when the splitting ratio is basically constant, the bandwidth of the optical signal transmitted). So make fiber optic splitter must be specified when the wavelength.
(4) isolation.
Isolation refers to the optical splitter of a light path of the other optical signal isolation. In the above indicators, the degree of isolation for the fiber optic splitter is more significant in the actual system applications often need to isolate more than 40dB of the device, otherwise it will affect the performance of the entire system. In addition the stability of optical fiber splitter is also an important indicator, the so-called stability refers to the external temperature changes, other devices work state changes, the optical splitter splitting ratio and other performance indicators should remain basically unchanged, In fact the stability of optical fiber splitter depends entirely on the manufacturer's level of technology, different manufacturers of products, the quality of a considerable disparity. In actual application, I also met a lot of poor quality fiber splitter, not only the performance degradation of fast, and the damage rate is very high, for optical fiber trunk important device, in the purchase must be noted, can not just look at Price, low level of the optical sub-channel price is certainly low.
In addition, uniformity, return loss, directivity, PDL in the optical splitter performance indicators occupy a very important position. [1]
The advantages of fiber splitter
1, the additional loss is low
2, the direction is good
3, the polarization sensitivity is low
4, cost-effective
5, environmental and mechanical stability
Application of Fiber Splitter
Fiber splitter is widely used in optical fiber communication systems, radio and television networks and other fields.
客服中心
工作时间

周一至周日

8:00 - 18:00

点击这里给我发消息 在线咨询

点击这里给我发消息 在线咨询

点击这里给我发消息 在线咨询




请直接QQ联系!
展开客服