Diffraction grating with dual modes for two-wavelength rewritable optical pickup heads

被引：6
|
作者：
Shih, Hsi-Fu [1 ]
Li, Bo-Wei [1 ]
机构：
[1] Natl Chung Hsing Univ, Dept Mech Engn, Taichung 402, Taiwan
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2007年 / 43卷 / 02期
关键词：
diffractive optical element (DOE); liquid crystal (LC); two-wavelength integrated laser diode (TWIN-LD); optical pickup head; three-beam grating;
D O I：
10.1109/TMAG.2006.888499
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper discloses the configuration of a dual-mode three-beam grating which adopts the liquid-crystal (LC) modulator technologies and has the function of switching diffraction properties. With the specific design of the top, bottom, and complementary electrodes, the grating has the feature of being modulated by external electric field for generating two diffraction modes. Two modes corresponding to different diffraction directions and angles were verified by experiments. This device could be applied to the fabrication of a monolithic three-beam grating, which is necessary for the tracking detection of a rewritable two-wavelength optical head using a two-wavelength integrated laser diode (TWIN-LD).
引用
收藏
页码：900 / 902
页数：3
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