Parameter selection method of multimode fiber laser speckle suppression scheme based on vibration mode

• Main Authors: SUN JIANFENG, LU WEI, LIU DI, WANG QI, ZHOU XIN, LI SINING
• Format: Patent
• Language: Chinese; English
• Published: 20.11.2020
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The invention relates to a parameter selection method of a multimode fiber laser speckle suppression scheme based on a vibration mode. The method comprises the following steps: on the basis of a multimode optical fiber coupling theory, under the condition that mode coupling of a vibration area is supposed to be far larger than mode coupling of a non-vibration area, an output power model of each transmission mode is obtained, the model shows that the coupling power of each mode is in direct proportion to the square of the vibration amplitude, and cosine change is carried out at the frequency of2 omega around stable power; a Gm-APD trigger probability model based on a multimode optical fiber vibration output power statistical model is obtained, and a multimode optical fiber coupled emissionmulti-frame statistical Gm-APD detection model based on a multimode optical fiber mode coupling theory, the Gm-APD trigger probability model and the multimode optical fiber output power statistical model is established. A the