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Pull cone coupler characteristic analysis - huiqiangren optical communication

date:2018-08-22 17:57

Hui strongman is the predecessor of the Shenzhen optical communication devices Langya Department (since 2008), 2013 by Shenzhen ttoff laser equipment Co., Ltd. invested 8 million, project group of Beihang University injection technology reorganized, focused on high quality tapered coupler, production of high power laser beam splitter, with fused taper products industry, Foxconn, TSMC "mode of operation, support of major customers direct orders, OEM oem.
The tapered coupler 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 outputs. 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.
Characteristic:
(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.
Applications: optical fiber communication system, optical fiber LAN, CATV, FTTH optical fiber sensors, measuring instruments

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