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

页码：79 / 82

页数：3

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