Optical signal processing is expected to eliminate bottlenecks faced by existing electrical processing, such as signal bandwidth, power consumption, and delay time. In optical signal processing, processing is performed by adjusting the frequency, amplitude, phase, and time-delay parameters of an optical signal. Currently, optical signal processing is dominated by circuits for specific applications (filters and optical computing). While such optical circuits offer high performance, they have the disadvantage of limited versatility. In this study, we aimed to develop a general-purpose processor architecture and realized three different types of signal processing on a single SOI chip: image processing, filtering, and signal equalization.