Light signal converter, light encoder, light decoder and CDMA communication

本发明提供一种光信号转换器、光编码器、光解码器和光码分多路复用通信设备，其中的光信号编码器/解码器包括光栅波导，其均匀间距光栅的数量等于二元相位光代码的代码芯片的数量，均匀间距光栅形成在一个波导方向上，以反射预定波长的光。这里，对应于一个光代码值在此发生变化的位置的相邻的均匀间距光栅彼此间隔布置成向光提供(2m+1)π/2的相移，其余相邻光栅彼此间隔布置成向光提供nπ的相移(m，n：整数)。 An optical signal encoder/decoder includes a grating waveguide having an identical number of uniform pitch gratings to the number of code chips of a binary phase optical code, the uniform pitch gratings being formed in a waveguide direction to reflect light of a predetermined wavelength. Here, adjacent gratings corresponding to a position at which the optical code value changes are disposed a spacing apart from each other to give a phase shift of (2m+1)pi/2 to the light, and the remaining adjacent gratings are disposed a spacing apart from each other to give a phase shift of npi to the light (m, n: integer).