We demonstrate a new type of time-integrative photorefractlve device using self-pumped phase conjugation. This device can be used for most of the applications related to time-integrative devices, such as demultiplexors and phase-sensitive detectors. A new device for angular multiplexing-to-frequency multiplexing conversion is proposed. By combining this new device with frequency demultiplexing, we show a new architecture for retrieving holograms from different holographic storages and for performing various arithmetic operations on the retrieved information. (C) 2002 Society of Photo-Optical Instrumentation Engineers.