Open AccessBACKWARD SCATTERING AND OPTICAL DIODE EFFECT IN Mn DOPED KNSBN CRYSTAL
Author(s) -
Weilong She,
Qi Wu,
Qingxing Li,
Yu Zhen-Xin,
Zhang Qing-Lun,
Huanchu Chen
Publication year - 1992
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.41.1706
Subject(s) - crystal (programming language) , materials science , diode , optics , scattering , doping , laser , laser diode , intensity (physics) , beam (structure) , physics , optoelectronics , computer science , programming language
When a He-Ne laser beam (632.8 nm) with the power of milliwatts or submilliwatts penetrates through a Mn doped KNSBN crystal, a phenomenon of strong backward scattering is observed. At the same time, an optical diode effect which is associated with the backward scatering is also observed. In a certain range, the response time constant T of the optical diode effect is inversely propotional to the incident intensity on the surface of the crystal. The τ is decreased by one order of magnititude when a K9 glass plate which serves as a feedback mirror is introduced. A time constant of 1.5s and a ratio of the forward transmissivty to the backward one, which is greater than 15.3, have been obtained. A theoretical explanation is given on the basis of the experimental results