The characteristics of front end light, a key problem in EFISI(Echelon Free Induced Spatial Incoherence), is analyzed in this paper, and a new partial coherence light source is researched here.
对无阶梯诱导空间非相干技术中前级光源太弱的问题进行了分析，开展了前级部分相干源的研究工作。
The results show that logarithmic light intensity fluctuation variance will be less when light source coherence becomes worse, i. e. it becomes into partially coherent light.
其结果表明，当光源的相干性变差，即变为部分相干光后，对数光强起伏方差变小；
Superluminescent diode(SLD)is an idea light source for fiber optic gyroscopes which can meet the requirements of the light source for high output power, low coherence and good stability.
光纤陀螺用光源要求输出功率高、相干性低、稳定性好。超辐射发光二极管（SLD）是能满足这些要求的理想光源。
Axial resolution in optical coherence tomography (OCT) imaging is determined by the coherence length of light source and the beam-focusing condition.
其轴向分辨率由光源带宽和探测光束的聚焦条件共同决定。
Fiber grating is manufactured by application of phase mask means, which is of low requirement of time coherence and monochromaticity for light-source, simple craft and high rate of finished products.
运用相位掩模法刻蚀光纤光栅，该方法对光源的时间相干性和单色性要求较低，工艺简单，成品率高。
Fiber grating is manufactured by application of phase mask means, which is of low requirement of time coherence and monochromaticity for light-source, simple craft and high rate of finished products.
运用相位掩模法刻蚀光纤光栅，该方法对光源的时间相干性和单色性要求较低，工艺简单，成品率高。
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