Research on and Experimental Verification of the Efficiency Enhancement of Powerspheres Through Distributed Incidence Combined with Intracavity Light Uniformity

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

I agree that optimizing receiver structure or introducing beam-splitting technology to balance light intensity could improve transmission efficiency. However, a receiver with six or more input ports is useless. As a receiver in laser wireless power transmission, uniform light distribution is important to efficiency on the conditions of light transmission. In fact, there are many papers on illumination uniformity of a circular rod in LD side-pumped lasers. 

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

This paper presents a theoretical analysis and verification of the feasibility of optimizing light intensity distribution in the powersphere using distributed laser incidence. To validate this method, the paper simultaneously carried out both simulation and experimental verifications. The following important issues should be well addressed before I can recommend it’s publication.

Major comments：

• Although the introduction briefly mentions previous methods, there is a lack of a clear comparison with existing researches.
• What are the advantages of the proposed method compared to existing methods?
• The simulation uses a 65mm spherical reflector, but due to equipment limitations, a 100mm reflector is used in the experiment. What is the specific impact of this on the experimental results?
• The paper does not mention uncertainty analysis or error margins for the simulated and experimental data. It is recommended to add relevant sources of error and the uncertainties they cause to make the article more reasonable.
• Some of the figures, such as Figure 1 and Figure 4, are blurry. Meanwhile, there are some blank pages in the paper, please pay attention to formatting. The experimental setup is not clear.

Comments for author File: Comments.pdf

Author Response

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Author Response File: Author Response.pdf

Reviewer 3 Report

Comments and Suggestions for Authors

In this paper, a method that utilizes multiple laser beams incident combined with a centrally positioned spherical reflector within the powersphere is proposed to improve laser wireless power transmission efficiency. It serves as a valuable reference for researchers and engineers in related fields. Before the publication of the article, the following issues need to be addressed:

1. The authors should elaborate on the main factors causing the fluctuations in Figure 5 and whether there are methods to mitigate them.
2. Conversion efficiency is a key parameter, which has not been discussed in detail in the current article.
3. In Figure 9, why is the configuration with a spherical reflector equipped with 6 laser units, while the one without a spherical reflector is not? Additionally, the reasons for the excessively large data range should be explained. The current statistical current and voltage values are absolute and should include error bars.
4. Comment on the prospects and advantages of novel Luminescent solar concentrators structures (such as: Nature Photonics, 2018, 12, 105-110; Joule, 2024, 8, 799-816；Qian, K. et al. PhotoniX 6, 22 (2025)) in laser power transmission systems.
5. Other issues: The layout of figures and tables in the article is disorganized and needs to be rearranged according to the journal's format. Some figures, such as Figure 2 and Figure 7, have unclear labels. The authors should carefully review all figures, tables, and labeling formats throughout the manuscript.

Author Response

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Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

Comments and Suggestions for Authors

The authors have addressed my concerns. I recommend it for publication in Photonics.

Reviewer 3 Report

Comments and Suggestions for Authors

The issue I am concerned about has been effectively resolved and does not require further modification. I suggest publishing it directly.