Abstract
In this paper, the design techniques required to design heterodyned OPLL such as frequency-phase deference detector, loop filter and phase noise of semiconductor laser are presented. Through the experiments with the calculated parameters, we confirmed that the frequency-phase difference detector simply develops an error component that is proportional to the frequency-phase difference between heterodyned optical signals. The achieved frequency-phase locking range of the input laser diode frequency is around . This paper describes the details of the designed as well as experimental results.
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