This text covers the fundamental aspects and the recent advances of photorefractive optics. Since there is a huge market potential for developing photorefractive (PR) optic devices for the needs of information infrastructure, the book will provide an intensive background and the state-of-the-art technological applications for these needs: for example, for accessible high-speed CD-ROM, 3-D optical interconnects, turnable filters, large capacity memories, and others. The book is an excellent reference text for technical staff, research scientists, and graduate students who are working in this field.