Patent ID: 7847225
Filing Date: 2010-12-07
Classification: G06N,H01L,H01S

Abstract:
1. An optical neural network comprising: an input semiconductor layer receiving an input signal and outputs a first output signal on the basis of the received input signal; a middle semiconductor layer provided to face the input semiconductor layer, receiving the first output signal from the input semiconductor layer and outputting a second output signal on the basis of the received first output signal; and an output semiconductor layer provided to face the middle semiconductor layer, receiving the second output signal from the middle semiconductor layer and outputting a final output signal on the basis of the received second output signal, wherein: the input semiconductor layer outputs light having a first emission angle distribution to the middle semiconductor layer as the first output signal if the signal level of the input signal is a first level and outputs light having a second emission angle distribution which is broader than the first emission angle distribution to the middle semiconductor layer as the first output signal if the signal level of the input signal is a second level which is lower than the first level; and the middle semiconductor layer outputs light having a third emission angle distribution to the output semiconductor layer as the second output signal if the signal level of the first output signal is a third level and outputs light having a fourth emission angle distribution which is broader than the third emission angle distribution to the output semiconductor layer as the second output signal if the signal level of the first output signal is a fourth level which is lower than the third level.