Open AccessPYROELECTRIC AFFECTION ON THE READOUT OF PHOTO-REFRACTIVE HOLOGRAPHIC GRATING
Author(s) -
Weilong She,
Yu Zhen-Xin,
Deming Lei
Publication year - 1996
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.45.1655
Subject(s) - photorefractive effect , pyroelectricity , grating , optics , holography , materials science , holographic grating , laser , beam (structure) , fiber bragg grating , optoelectronics , laser beams , physics , diffraction grating , ferroelectricity , dielectric
The photorefractive holographic grating in a Mn doped K1-yNayBa2-xSrxNb5O15 (KNSBN) is written with two 0.27mW He-Ne laser beams (632.6nm) and is read with one quasicontinuous dye laser beam (621.8nm, 1.6mW or less). It is found that the Bragg diffracton suddenly reaches its maximum at the beginning and then decays to its minimum with a time constant of about 0.6s. The ratio of the maximum to the minimum can be higher than 7.5. A theory including pyroelectric effect has been developed and it fits the experiment well.