基于双光束干涉的声光行波转录信号记录

Acoustooptic traveling-wave transcription signal recording based on two-beam interference.

作者信息

Ishii A, Yamamoto M

出版信息

Appl Opt. 1979 Feb 1;18(3):335-42. doi: 10.1364/AO.18.000335.

DOI:10.1364/AO.18.000335

PMID:20208715

Abstract

A novel technique of wideband signal recording has been developed for the optical video disk. An FM videoband signal is carried by a traveling acoustic wave in the form of AM modulation through an acoustic medium under continuous laser illumination and transcribed optically onto a synchronously moving photosensitive medium. As the recording frequency bandwidth is not restricted by the laser beam diameter basically, a wideband recording system with large depth of focus can be established by using the large beam diameter. Wideband recording up to 18 MHz (1-microm record pitch) is experimentally verified using As-Se-S-Ge chalcogenide glass as a high resolution recording medium.

摘要

一种用于光学视频盘的宽带信号记录新技术已经被开发出来。调频视频带信号由行波声波以调幅调制的形式通过声学介质在连续激光照射下传输，并光学转录到同步移动的光敏介质上。由于记录频率带宽基本上不受激光束直径的限制，通过使用大光束直径可以建立具有大焦深的宽带记录系统。使用As-Se-S-Ge硫系玻璃作为高分辨率记录介质，实验验证了高达18 MHz（1微米记录间距）的宽带记录。