Invention Grant
US09329416B2 Method for brightness enhancement and modes manipulation of a multimode optical fiber 有权
多模光纤的亮度增强和模式操作的方法

Method for brightness enhancement and modes manipulation of a multimode optical fiber
Abstract:
The invention relates to adaptive optics techniques applied to alter the modal structure of light propagating in an optical fiber. In particular the invention relates to altering the modal structure in a multimode beam propagating in a multimode fiber by lowering the number of higher modes. The method comprises combining a wavefront sensor and/or a power sensor with a phase control actuator and actuator control algorithms, to alter the phase structure of the beam thereby to eliminate higher modes. The corrected beam can be then effectively coupled into a smaller diameter fiber with minimum loss of energy and concentrated to smaller spot sizes limited by diffraction.
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