title: Optical masks prepared by using a liquid-crystal light valve for light-induced photorefractive waveguides.
abstract: The optical mask prepared by using a LCLV (liquid-crystal light valve) are first proposed for light-induced photoreactive waveguides in photorefractive materials. Employing this technique, various waveguide structures can be fabricated, e.g., Y- or multiple-branches waveguides, fiber-like waveguides, and Mach-Zehnder-like switches, and even whole optical circuits may be formed. A Y-branches waveguide and a fiber-like waveguide were demonstrated in a LiNbO3:Fe crystal. Several technical problems, such as intensities, resolutions, writing speed, and so on, were also discussed in detail. Using a LCLV with a fast response and a writing beam with a high intensity, the waveguide structures may be changed in real time.
authors.affiliation: Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.forename: Jianlin
authors.initials: J
authors.lastname: Zhao
authors.forename: Dexing
authors.initials: D
authors.lastname: Yang
authors.forename: Bili
authors.initials: B
authors.lastname: Li
authors.forename: Dongsheng
authors.initials: D
authors.lastname: Yang
authors.forename: Xiqi
authors.initials: X
authors.lastname: Feng