Method and device for achieving coherent laser beam combination

Abstract

The invention discloses a method for achieving coherent laser beam combination, and belongs to the technical field of lasers. The method includes the steps of dividing signal light emitted by a laser device into multiple routes of laser beams, leading out one of the multiple routes of laser beams as current reference light, enabling the rest of the multiple routes of laser beams to be coupled with corresponding blue light beams respectively, conducting amplification on the coupled beams, and outputting the beams in a collimation mode after the beams undergo light modulation to obtain a coherent laser beam. The light modulation is achieved through the step of modulating blue light in each route of light beams into laser phase positions. The power of the current blue light beam which is coupled with the laser beam depends on the phase position difference between previous reference light and the corresponding route of light beam which is outputted in the collimation mode after the light modulation is conducted. Meanwhile, the invention further provides a device corresponding to the method. The method is easy and convenient to achieve, the device is easy and convenient to obtain, accurate phase position modulation can be achieved without specific requirements for the thermal bearing capacity of devices, high-power coherent laser output is achieved, and the method and device can be widely applied to the laser technology.

Description

technical field [0001] The invention belongs to the technical field of lasers, and in particular relates to a method and a device for realizing laser wavefront coherent beam combining. Background technique [0002] In the application fields with high requirements for laser power, due to the influence of the thermal effect or nonlinear effect of the laser itself, the output power of the laser will be limited. To achieve the required higher laser output power, laser beam combining technology is one of them. A technical solution to meet the system's requirements for high-power laser output. [0003] In the technical scheme of laser beam combining, two commonly used beam combining methods are: incoherent beam combining and coherent beam combining, in which non-coherent beam combining is simply the superposition of laser energy from various paths, so optimal beam combining cannot be achieved; and Coherent beam combining is the interference of various laser beams, which is the su...

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Problems solved by technology

However, in this solution, since the special volume grating coherently superimposes the common output in one direction, its working area is relatively

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