Efficient local fixing of photorefractive polymer hologram using a laser beam

We propose and demonstrate a novel technique for efficient local fixing of photorefractive polymer hologram using a laser beam. In the technique, a CO(2) laser beam is used to heat the sample and a local hologram can be fixed easier than previous methods. By using thinner glass substrates for the photorefractive device, the hologram can be fixed efficiently and at much faster speed. The fixation efficiency can be greater than 80% and the hologram can be fixed in the order of a second. This technique is critical for dynamic holographic three-dimensional display and holographic data storage.