The photoelectric conversion module in the Active Optical Cable plays a key role in realizing the conversion between optical signals and electrical signals.
The photoelectric conversion module is mainly composed of a light receiving part and an electrical transmitting part. At the optical signal receiving end, when the optical signal is transmitted to the photoelectric conversion module through the Active Optical Cable, the light is first received by a photosensitive detector. Common photosensitive detectors include photodiodes, etc. The working principle of the photosensitive detector is based on the photoelectric effect. When light is irradiated on the detector, the energy of the photon is absorbed by the detector material, exciting the electrons to jump from the valence band to the conduction band, thereby generating photogenerated carriers. These photogenerated carriers form a weak current signal inside the detector.
Next, this weak current signal will be amplified by the amplifier circuit. The function of the amplifier circuit is to amplify the weak current signal generated by the photosensitive detector to a processable level for subsequent processing. The amplified electrical signal will pass through some signal conditioning circuits for filtering, shaping and other processing to remove noise and interference and improve the quality of the signal.
At the electrical signal transmitting end, the processed electrical signal is input into a light-emitting device such as a light-emitting diode (LED) or a laser diode. The working principle of these light-emitting devices is that when current passes through, they emit light of a specific wavelength. The light-emitting device adjusts the intensity and frequency of the emitted light according to the changes in the input electrical signal, thereby converting the electrical signal into an optical signal. The optical signal is then transmitted through the optical fiber in the Active Optical Cable.
In order to ensure the stable operation of the photoelectric conversion module, some control circuits and power management circuits are usually required. The control circuit can monitor the working status of the photoelectric conversion module and adjust the parameters to ensure the best performance. The power management circuit provides a stable power supply for the photoelectric conversion module to ensure that all parts can work normally.
In practical applications, the performance of the photoelectric conversion module is affected by many factors. For example, the sensitivity of the photosensitive detector, the power and efficiency of the light-emitting device, the noise level of the amplifier circuit, etc. will affect the quality and speed of the photoelectric conversion. In addition, environmental factors such as temperature and humidity may also affect the performance of the photoelectric conversion module. Therefore, when designing and manufacturing the Active Optical Cable, the photoelectric conversion module needs to be carefully optimized and tested to ensure that it can work reliably under various conditions.
