We investigate interband photorefraction in pure and Mg-doped near-stoichiometric LiTaO3 at the deep ultraviolet wavelength of 257 nm. By controlling the stoichiometry, the response time and dynamic range of the interband photorefractive effect can be very much improved. Measured time constants are in the order of a few tens of milliseconds for UV light intensities of about 100 mW/cm2. Further, we report that Mg doping of near-stoichiometric LiTaO3 increases the grating response rate by a factor of 50 compared with the one in undoped crystals. For UV light intensities larger than 500 mW/cm2 the response time is faster than one millisecond. In Mg-doped near-stoichiometric LiTaO3, quasi-fi xing of holographic gratings with UV light and nondestructive readout in the visible has been observed.

© 2005 Optical Society of America

PDF Article
More Like This
Light-Induced Dynamic and Quasi-Fixed Waveguides in Mg-doped Near-Stoichiometric LiTaO3

Flurin Juvalta, Mojca Jazbinšek, Peter Günter, Germano Montemezzani, and Kenji Kitamura
SuD4 Photorefractive Effects, Photosensitivity, Fiber Gratings, Photonic Materials and More (PR) 2007

Spectroscopic investigation of photovoltaic effect and photoconductivity in undoped and Mg-doped near-stoichiometric LiTaO3 crystals

Youwen Liu, Kenji Kitamura, Shunji Takekawa, Masaru Nakamura, Yasunori Furukawa, and Hideki Hatano
191 Photorefractive Effects, Materials, and Devices (PEMD) 2005

Improvement of ultraviolet photorefractive effects in stoichiometric LiTaO3

G. Montemezzani, P. Bernasconi, P. Günter, Y. Furukawa, and K. Kitamura
MC3 Advances in Photorefractive Materials, Effects and Devices (APMED) 1999


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access Optica Member Subscription