Holographic laser module with dual wavelength for digital versatile disc optical heads

被引：15

作者：

Shih, HF ^{[1
]}

Yang, TP

Freeman, MO

Wang, JK

Yau, HF

Huang, DR

机构：

[1] Ind Technol Res Inst, Optoelect & Syst Labs, Hsinchu 310, Taiwan

[2] Natl Cent Univ, Inst Opt Sci, Chungli 320, Taiwan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1999年 / 38卷 / 3B期

关键词：

digital versatile disc; compact disc; compact disc-recordable; holographic pickup-head module; holographic optical element; optical head; pickup head; holographic laser module;

D O I：

10.1143/JJAP.38.1750

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Backward compatibility with CD'-R necessitates having two laser sources in the digital versatile disc (DVD) pickup head. The dual-wavelength optical head complicates pickup design and enlarges the volume of the head. Moreover, it increases the number of components and assembly cost. In this paper, we present a new design for a dual-wavelength holographic pickup-head module. Packaged together in the module are two laser diodes, photodiodes and a holographic optical element (HOE) for diffracting reflected light from the disk onto the corresponding photodetectors. This module can be used as the core of an optical head capable of reading DVD, CD and CD-R.

引用

页码：1750 / 1754

页数：5