接口数控端口和电阻激光驱动器-Interfacing Dig
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To illustrate some of the concepts described in the previous paragraph, Figures 4a, 4b, and 4c show typical characteristics in lasers and photodiodes after they are temperature compensated with look-up tables.
Figure 4a. A laser bias current variation is implemented with a look-up table if an open-loop operation such as Figure 1a is used.
Figure 4b. A peak-to-peak laser modulation current variation is implemented with a look-up table if an open-loop operation, such as Figure 2a, is used.
Figure 4c. An integrated photodiode current variation is implemented with a look-up table if a closed-loop operation (APC), such as Figure 3a, is used.
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