Computer Simulation of Multichannel Beam Focusing System in Turbulent Atmosphere
Round 1
Reviewer 1 Report
This work requires significant improvement. At this moment it looks uncompleted in different aspects, including problem statement, illustrations and discussions.
1. Self-citation in this manuscript should be reduced. Instead, the problem statement requires more thorough review of recent and relevant works. For instance, it is better to comment in details the problem of thermal blooming.
2. Authors should discuss the tasks and particular cases, where the multichannel laser beam system is applicable. At this moment, the manuscript is too specific; it has poor practically explanation of the problem statement. It is essential to note why the multichannel system is worth studying?
3. All parameters from eq. (1) and (2) should be introduced right after the equations: n, k, r.
4. In addition, the statement of the problem should be simply illustrated, explaining the source position, axis orientation, introducing the layer structure of the atmosphere refractive index, and other geometry of the task.
5. In the eq. (5) authors used different symbol for wave numbers.
6. Figures should be completely translated and presented in English without Russian symbols.
7. Please, explain the choice of particular parameters used for simulation (at the beginning of Sec. 3.1).
8. The authors should note the origin of the soft applied for simulations. Was it commercial or homemade?
9. All figures require colorbars.
1 10. The results of this work are not compared and discussed. The complete discussion is missed. This missed section should include the explanation of applying beam configurations, reduction of focusing energy, particular cases, where these results are relevant, possible solutions for the reduction of the shown distortions.
Author Response
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Reviewer 2 Report
This paper describes the simulation of the propagation of several incoherent hypergaussian laser beams in a turbulent atmosphere described by a nonlinear equation for the change in the refractive index due to wind drift and due to thermal changes, as well as the Karman spectral density. Focusing distance 5 km. It is shown how the focal spot is distorted at a wind speed of 3m/s and a power of each laser beam of 3 kW. The work can be published after the authors take into account the comments.
Comments
1. The model from equations (1)-(5) describes random changes in the turbulent atmosphere, but does not take into account the fact that different laser beams are added incoherently. Equation (1) describes the propagation of a coherent light field. The authors should explain how the model takes into account the incoherence of several laser beams.
2. In Fig. 2, it is necessary to indicate which phase is marked with even, and which phase is white.
3. In Figure 5, you should also indicate how the phase is distributed over semitones.
4. Figure 6 does not indicate where the phase is, and where the intensity is, and the distribution of the phase over halftones is not given.
5. The most recent link in the references section of 2019. 2-3 references should be added to works on the propagation of incoherent light in a turbulent atmosphere in 2021-2022.
Author Response
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Reviewer 3 Report
A theoretical study of the focusing of beams from a system of 6 high-power near-infrared lasers in the atmosphere has been carried out , the beams are in phase. The average effect of turbulent fluctuations of the refractive index of air is introduced, which introduce distortion of the phase of rays and cause diffraction effects (rings) in the area of their focusing and on the path of propagation of the rays. The influence of the side wind is analyzed, which will lead to the asymmetry of the pattern of rays during the focusing. The authors of the article are well-known scientists in the field of atmospheric physics and, in particular, turbulent processes. Therefore, the presented results and conclusions are not in doubt. At the same time, the presentation of the calculation process is described poorly, and there are also few explanations when presenting the mathematical analytical model. I recommend to expand the description of the model and add more explanations in part 2 possibly.
Author Response
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Reviewer 4 Report
This paper describes the results of a computer simulation of laser beams focusing in turbulent atmosphere. It is overall a good piece of work to be publshed, though major modifications still need to be addressed during the revisions.
Comments:
1. The overall English writing still needs more polishment, especially for the introduction.
2. Around lines 21 to 22 and 22 to 24 in the first paragraph of the introduction, these sentences need citations.
3. Around lines 28 to 29, add citation.
4. Line 207, I think it must be the section 4.
5. The authors give only numerical calculations and simulation results, whether this system can make contributions to the earth's atmosphere? Or only can be the futher work as section 4 describes?
Author Response
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Round 2
Reviewer 1 Report
The authors have revised the manuscript, taking into account the previously mentioned issues. I have nothing further to address.
Reviewer 4 Report
The authors have addressed all my comments. I recommend this manuscript to be published.
