Pore diameter filling device and method

Abstract

The invention relates to the field of laser coherent synthesis, in particular to a pore diameter filling device and method for realizing synthesis of multiple paths of light beams by using a stacked spectral interference light path. Specific to the problems existing in the prior art, the invention provides a pore diameter filling device and method for coherent synthesis of multiple paths of laser light beams. By controlling a phase voltage error through a plurality of coherent light beams by using a reflecting mirror, a spectroscope, a feedback circuit and the like, multiple paths of coherent light beams are synthesized into a single far field main lobe main beam. The pore diameter filling device comprises a first synthesis interference light path, a second synthesis interference light path, a synthesizer, a first spectroscope and a feedback circuit, wherein the first synthesis interference light path and the second synthesis interference light path are used for performing power synthesis on two paths of input light signals; the synthesizer is used for performing power synthesis on output signals of the first synthesis interference light path and the second synthesis interference light path; the first spectroscope is used for reflecting and transmitting a light signal output by the synthesizer; and the feedback circuit is used for performing feedback light signal adjustment on a light signal reflected by the spectroscope. The pore diameter filling device and the pore diameter filling method are mainly applied in the field of laser coherent synthesis.

Description

technical field [0001] The invention relates to the field of coherent combination of lasers, in particular to an aperture filling device and method for combining multi-path coherent laser beams by using a superimposed spectroscopic interference optical path. Background technique [0002] In order to break through the limitation of a single laser power bottleneck, more and more researchers pay more and more attention to coherently combining multiple lasers to obtain higher laser power output. In the active coherent combination technology, the phase detection and control technology can be used to keep the phases of multiple beams highly correlated. However, due to the light field mode in the optical path and mechanical assembly, the arrangement of the beams cannot be infinitely tight. The actual laser The fill factor of the array (the fill factor refers to the ratio of the effective light output area of ​​the near-field laser array to the entire aperture) is generally much sma...

AI Technical Summary

Problems solved by technology

The key to the amplitude-to-phase conversion technology is to design a suitable phase plate, but the phase plate is difficult to withstand the extremely high laser power density caused by lens focusing; the self-imaging waveguide uses the "self-imaging" effect of the multimode waveguide, but the size of the waveguide Smaller, the number of laser beams accommodated is limited, and the design of high-power self-imaging waveguide is also difficult; beam shaping uses an aspheric lens group to shape each laser beam into a flat-top beam with uniform distribution of amplitude and phase, but it has a shaping function The design of the aspheric lens group is very difficult, and the adjustment of the multi-channel lens group is also very troublesome; the diffractive optics method needs to design a special grating, such as a Damman grating, but the grating also needs to withstand high-power laser irradiation, and will be Introduce other factors such as thermal deformation to destroy the beam quality of the combined beam

Images