Coherence dependence of fiber-optic laser Doppler velocimeter output using self-mixing laser diode
Coherence dependence of fiber-optic laser Doppler velocimeter output using self-mixing laser diode
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DOI：
10.1109/imtc.1993.382606
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发表时间：
1993-05
期刊：
影响因子：
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通讯作者：
S. Shinohara;N. Yonezu;H. Ikeda;H. Yoshida;M. Sumi
中科院分区：
文献类型：
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作者：
S. Shinohara;N. Yonezu;H. Ikeda;H. Yoshida;M. Sumi
一种采用自混合激光二极管（SM-LD）的新型激光多普勒测速仪（LDV），该激光二极管具有10米至1公里长的光纤作为光导。这种新型LDV可以测量20 ~ 40db范围内的高信噪比多普勒最佳信号。之所以多普勒拍频信号是由安装在具有如此长光纤的SM-LD中的光电二极管获得的，这是由于SM-LD的相干长度增强，延伸到400 m以上
A new laser Doppler velocimeter (LDV) employing a self-mixing laser diode (SM-LD), which has a long optical fiber of 10 m to 1 km, as a light guide. This new LDV can measure a Doppler best signal with high signal to noise ratio in the range of 20-40 dB. The reason why the Doppler beat signal is obtained from a photodiode accommodated in the SM-LD having such a long fiber is attributed to the coherence length enhancement of the SM-LD, which extends to 400 m or more.>