Speckle control using high-frequency signal superposition to semiconductor laser

被引：0
作者：
Hiroshi Murata
Katsuya Shibasaki
Kazuhisa Yamamoto
Yasuyuki Okamura
机构：
[1] Osaka University,Graduate School of Engineering Science
[2] Osaka University,Photon Pioneers Center
来源：
Optical Review | 2014年 / 21卷
关键词：
speckle noise; laser display; semiconductor laser; relaxation oscillation; optical modulation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Speckle contrast of images generated by a red semiconductor laser was measured precisely utilizing a state-of-the-art speckle measurement system with a cooled CCD camera with auto-light-power-level adjustments. By using high-frequency signal (∼500 MHz) superposition to the single-mode semiconductor laser, the 3 dB spectrum of the laser beam was broadened from 0.1 to 2.3 nm. As a result, the speckle contrast value was drastically reduced from 0.9 to 0.2.
引用
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页码：79 / 82
页数：3
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