【正文】 ion current set list is 80 bytes with one byte per two degrees, while power setting table takes 40 bytes with one byte for every 4 degreess. Both temperature range is 40 to 120 centigrade, which meets the requirements of industrial temperature . When an external temperature sensor added to the microcontroller, microcontroller converts voltage sent by the temperature sensor into a temperature value through ADC, then look up the temperature lookup table to find the corresponding data. Sent the data to the power set register and modulation current setting register in PHY1076 accordingly, adjust the laser’s bias current and modulation current, which adjust the output optical power and extinction ratio. Values of numerical data table are obtained from test. During the process of transceiver debugging, test the the sample’s each output of eye pattern under different temperature and modify the corresponding temperature data, so as to make the output optical eye pattern, optical power and extinction ratio of optical transceiver to meet the requirements. Finally, save these data to a temperature lookup table and the internal EEPROM in ATMEGA88. In the real application environment, when repowers, the transceiver load the EEPROM data into RAM area, and then you can stable the average output optical power and extinction ratio in the whole temperature range.4 Analysis Of Results And Test Based on the above discussion of the design program, we select the PHY1076 dedicated chip and ATMEGA88 microcontroller, plus appropriate external circuit design circuit boards with the TOSA, ROSA welded together in custom enclosures to achieve a SFP optical transceivers. Debug Internal registers in PHY1076 in order to make parameters of optical transceivers meet requirements about 10km Gigabit Ethernet protocol optical interface in agreement. Meantime,using the designed debug software on the host puter to debug temperature lookup table of the ATMEGA88 to determine the specific values ??for each temperature. Which pleted the design of optical transceivers. And then test all parameters of optical transceivers at low temperature, room temperature and high temperature environment. The results is shown in Table 1.Table 1 the parameters of optical transceiver test resultsParametersUnitsDesign requirementsTest Results40186。C25186。C80186。CAverage transmitteddBm9～3Extinction ratiodB9Emission eye socketReceiver SensitivitydBm23As it can be seen from the table. The laser’s output optical power and extinction ratio are within the required parameter range with small changes. When tested eye pattern under each temperature,we found the performance at low temperatures, room temperature, low temperature are all good. As the temperature goes high ,it need to provide greater modulation current. So the signal’s undershoot is obvious as a slight eye line appearing in the 0 signals in the eye pattern. But the overall margin on the template test are greater than 40%. Thus validated the feasibility and correctness of the design.5 SummaryAfter discussing the program, software design ,hardware design and sample’s debuging and testing. Ultimately,we successfully realized the design of the singlechip design SFP optical transceivers. Features of this program is to integrated the laser driven with receiving and amplifing section, to use a mon singlechip microcontroller to control programs. Both are able to reduce product costs and increase productivity theoretically. Since this program is a new program, technology maturity is to be improved, system patibility and market potential problems are yet to be tested. In addition to the amount, the cost advantage is also reflected no great advantage. But you can still believe that with the acceleration of network speed and the cost pressures when optical access, new technologies will bee more perfect and market share will the appointed time ,cost advantage will be reflected.12 / 1