What may be the routine knowledge of optical transceiver
نوشته شده توسط : ewr

In addition to the above three main technical parameters, the Juniper EX-SFP-10GE-LR gets the following basic concepts, which just need to be understood briefly

 Laser category: The laser is the core device in the optical transceiver. It injects current in to the semiconductor material and emits laser light through the photon oscillation and gain of the resonant cavity. At the moment, the mostly used lasers are FP and DFB lasers. The difference between them is that the semiconductor materials and resonant cavity structure will vary. The cost of DFB lasers is a lot more costly than that of FP lasers. Optical transceiver with a transmission distance of significantly less than 40KM generally use FP lasers; The optical transceiver with a transmission distance ≥40KM generally use DFB lasers

 Loss and dispersion: Loss may be the lack of light energy because of the absorption, scattering and leakage of the medium when light is transmitted in the optical fiber. This portion of the energy is dissipated at a certain rate as the transmission distance increases. The generation of chromatic dispersion is principally due to the unequal speed of electromagnetic waves of different wavelengths when propagating in the same medium, which in turn causes the various wavelength components of the optical signal to reach at the receiving end at differing times because of the accumulation of transmission distance, leading to pulse broadening and inability to tell apart the signal value. Both of these parameters mainly affect the transmission distance of the optical transceiver. In the actual application process, the link loss of the 1310nm optical transceiver is generally calculated at 0.35dBm/km, and the hyperlink lack of the 1550nm optical transceiver is normally calculated at 0.20dBm/km, and the calculation of the dispersion value Very complicated, generally limited to reference

 Transmitting optical power and getting sensitivity: Transmitting optical power refers to the output optical power of the source of light at the transmitting end of the optical transceiver, and receiving sensitivity identifies the minimum received optical power of the optical transceiver at a particular rate and little bit error rate. The units of the two parameters are dBm (meaning decibel milliwatt, logarithmic form of power unit mw, the calculation formula can be 10lg, 1mw is changed into 0dBm), which are mainly utilized to define the transmission distance of the merchandise, different wavelengths, transmission rates and The optical transmitting power and getting sensitivity of the optical transceiver of the transmission distance changes, as long as the transmission distance could be ensured

The service life of the optical transceiver: the international uniform standard, 7X24 hours of uninterrupted work for 50,000 hours (equal to 5 years

 Optical fiber interface: HP J9151A Modules are all LC interfaces, GBIC optical transceiver are SC interfaces, and other interfaces consist of FC and ST

 Working temperature: 0~+70℃; storage temperature: -45~+80℃; working voltage: 3.3V; working level: TTL/PECL/CML/LVDS.Learn:www.oemfibers.com

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تاریخ انتشار : سه شنبه 11 شهريور 1399 | نظرات ()
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