| 專利摘要 | An optical intensity modulator with optimized extinction ratio (ER) is provided. The optical intensity modulator has a modulator used to receive a light source, such as a laser source, and export an optical pulse. An optical divide is used to receive the optical pulse and decouple it into a first optical pulse and a second optical pulse. An optical receiver is used to receive the first optical pulse and convert it into an electrical pulse signal. A signal processor is used to receive the electrical pulse signal from the optical receiver and digitize it into a digital reference signal. A DC-bias generator coupled to the signal processor and the modulator is used to provide a precise DC bias to the modulator according to an output of the signal processor. A current reference signals is compared with a previous reference signals and is adjusted in the signal processor so as to obtain the precise DC bias. The optical intensity modulator further includes a pulse generator, used to provide a pulse signal for the modulator and a trigger signal to the signal processor. |