研究目的
Measuring color speckle metrics of an RGB-combined white laser beam emitted from an optical fiber output of two types of RGB laser module.
研究成果
A new method for converting the measured 2D speckle data on the FFP background into those on the homogeneous background was proposed and proved to be useful both for the FFP and the color speckle measurements.
研究不足
The complexity of the color FFP background makes it difficult to measure the speckle metrics directly without conversion into the homogeneous background.
1：Experimental Design and Method Selection:
A new method for eliminating the effects of a fiber far field pattern from the measured 2D speckle data is employed.
2：Sample Selection and Data Sources:
Two types of RGB laser modules, one with a single-mode fiber (SMF) output and the other with a multi-mode fiber (MMF) output, were measured.
3：List of Experimental Equipment and Materials:
Speckle measurement equipment SM01VS11 (Oxide Corporation), diffuse reflectance target SRT-99-120 (Labsphere Inc.), RGB laser meter TM6104 (HIOKI E.E. CORPORATION).
4：Experimental Procedures and Operational Workflow:
The monochromatic R, G, B speckle and the color speckle metrics were measured by projecting the laser beam on a standard diffusive screen and using the speckle measurement equipment.
5：Data Analysis Methods:
The speckle metrics were calculated using the measured R, G, B speckle data, the measured R, G, B wavelengths, and the measured RGB power ratio.
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