Friday, April 6, 2012

Fiber optical modules

    Fiber optical modules (SFP XFP GBIC) are used for optical signal transmission through optical fiber. It has a strong advantage in long distance transmission within low-loss. The commonly used optical modules including: optical transmitters, optical receivers, transceivers and transponders.
    Transceiver’s main function is to achieve the transformation between optical and electricity, including power control, modulation sends, signal detection, IV conversion, limiting amplifier judgment regeneration, TX-disable, security information inquiry. The common transceivers are SIP9, SFF, SFP, GBIC and XFP.
    In addition to the photoelectric conversion function, Transponder also integrates a lot of signal processing functions, such as MUX/DEMUX, CDR, function control, monitoring and Performance variables acquisition. The common transponders are 200/300pin, XENPAK, X2 etc.
    The fiber optical module’s data rate refers to the bits of transmission per second of unit Mb/s or Gb/s. The transmission distance of modules is divided into short distance, long distance and middle distance. Usually we defined no longer than 2km is short distance, 10km to 20 km is middle distance and 30km or more is long distance. The center wavelength of modules usually has 3 main used kinds: 850nm, 1310nm and 1550nm. 850nm used for short distance transmission, the remaining two kinds of wavelength are used for middle and long distance transmission.
    SOPTO improve cost-effective optical modules range from low rate up to 10G, for instance, the series of GBIC, SFP, SFP+, XFP, SFF, 1*9 and compatible with main brand, H3C,Cisco, Huawei, HP, Nortel, D-link and so on.

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