Design And Implementation Of SFP Optical Transceiver With Digital Diagnose Monitor Function

Fiber Communication has become a main means of transmission. With the improvement of the communication capacity and communication network, the communication link management has been an increasingly complicated problem. The mutual reinforcement of the technical development between the optical transceiver module and the fiber communication network has hastened the intelligence function of the optical transceiver module. With the digital diagnosis monitor function, the optical transceiver module is of some intelligence, and can provide a simple means of performance monitoring to improve the efficiency of communication management.On basis of the above, the paper makes a research on the small form pluggable (SFP) optical transceiver module with the digital diagnosis monitor function, and does a deep study of optical module principle, digital diagnosis principle, optical module hardware design, optical modules underlying software design, and monitor software design, giving a common design means of the SFP optical module with the digital diagnostic function.In the part of the study of optical module controlling, the paper employs micro control unit (MCU) and memory unit with a good flexibility and cost-effective, substituting for traditional control chip with the digital diagnosis monitor function. It also poses a new method of retrorse data calibration in the study of data calibration of the five analog parameter(operating voltage,module temperature,bias current, transmitted optical power,received optical power), based on the SFF-8472 protocol providing the positive data calibration. The retrorse data calibration provides the convenience for the testers and improves the test efficiency. In the way of monitoring, it conceives a scheme on automatic test system of optical module, which can improve the monitor efficiency compared with the manual test. Besides , the paper also involves the master and slave module IIC communication, the parallel port simulate IIC communication protocol, automatic temperature compensation, the conversion of A/D, FLASH programming, the fixed point operation replacing floating point operation, the optimization of MCU code, and so on. Experiment verification shows that the optical module meets the requirements of SFF-8472 and multi source protocol MSA, and using the retrorse data calibration to calibrate data, the five analog calibrating deviations also satisfy the requirements of the index.