Design of High-Performance Driving Power Supply for Semiconductor Laser

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

The main goal of this manuscript is to discuss high performance driving system of authors' high-power semiconductor laser through simulated and experimental results. This manuscript provides a lot of details about their theoretical calculations and experimental procedures, but the manuscript has to be improved because authors do not explain their data sufficiently.

1) Please provide the full names of all acronyms when these acronyms first appear. For example: LCC in Lin13; MOS in Line 18; QCL in Line 49, etc.

2) Please rephrase the sentence between Line 19 and Line 20. It is difficult to read.

3) The second paragraph in the introduction section is too long, so please separate it into two paragraphs starting from "In order to address the limitations of aforementioned......."

4) The captions of Figures in the manuscript are too short and not clear. Please give clearer captions for each figure.

5) In Fig. 3a, when Q_l increases, the peak of normalized frequency will be left-shift and thicker. Please explain why.

6) In Fig. 3b, please also explain the peak movement and width change when A changes.

7) In Fig. 4, there are 2 groups of turns ratio and duty cycle. What is the difference between these 2 group? 

8) Line 174, how to see "change dramatically", please explain.

9) In Fig. 5, the authors need to explain the validity of the data and why, rather than just saying what can be seen from the graph. For example, why the resonant current increases first and then decreases when the capacitance ratio and quality factor increase; why the peaks of resonant current are ~1.5 and ~0.8 for capacitance ratio and quality factor, respectively.  

10) Line 374, authors mention that the LADRC algorithm has a good performance in anti-interference. What does good performance mean? How and why does the data demonstrate good performance？

11) In Figure 11, the numerical similarity between the simulated data and the experimental data is very strong, which worries me. Please explain the validity of the data.

Comments on the Quality of English Language

The English in this draft still can be improved to some extent. 

Author Response

1. In response to the problem that the acronym does not provide the full name for the first time, the full name has been provided for some acronyms that provide the full name (such as MOS (Metal-Oxide-Semiconductor)). LCC and QCL are not acronyms, and LCC refers to the type of resonant converter. Because its resonator is composed of an inductor L and two capacitors C, it is called the LCC resonant converter, and QCL only represents the code of a series of power supplies.
2. Lines 19-20 have been rewritten.
3. It has been rewritten according to your comments.
4. The unclear chart has been processed.
5. FIG. 3a deduces the mathematical relationship between resonant parameters and current gain by establishing the mathematical model of LCC resonant converter. By changing quality factor Ql, the current gain changes.
6. In FIG. 3b, the change of capacitance ratio A and current gain is studied through mathematical modeling. Due to the change of capacitor parameters, the nonlinear change of capacitance ratio A will affect the change of the peak value of the gain curve.
7. As shown in Figure 4, the relationship between turns ratio, duty cycle and frequency ratio and device current gain and voltage gain respectively is studied. When turns ratio and duty cycle are determined, it plays a crucial role in the selection of frequency ratio parameters.

8. The phrase "sharp change" in line 174, referring to the large slope of the curve and its unclear description, has been changed.

9. FIG.5 studies the relationship between the change of resonant transformation parameters and the resonant current. When the resonant inductance is determined, the capacitor resonates with the resonant inductor, and the circuit exhibits resistance and the resonant current peaks.
10. The performance of LADRC algorithm in anti-jamming is demonstrated by the simulation and experiment of load mutation.
11. Since Figure 11 is the calculation of the efficiency of the resonant converter simulation model and the experimental efficiency, there is a certain difference. From the general trend, the results are consistent.

Reviewer 2 Report

Comments and Suggestions for Authors

The paper in general is a very good paper, however some comments need to be addressed.

Title: the title is too broad; it should be more specific and there is no need for word “research”. Furthermore, LCC is stand for what?

References: please check the numbering.

The authors should compare the obtained results to state-of-the-arts results.

Comments on the Quality of English Language

 Minor editing of English language is required

Author Response

1.Change the title of the paper to "Design of High Performance Driving Power Supply for Semiconductor Laser" according to your suggestion.

2.LCC refers to the type of resonant converter, because its resonator is composed of an inductor L and two capacitors C, it is called LCC resonant converter.

3.Reference numbers have been checked.

4.According to your comments, the data results are compared with the advanced results in the conclusion.

 

Reviewer 3 Report

Comments and Suggestions for Authors

This paper is a study of the "Research on High Performance Driving System of High Power 2
Semiconductor Laser".

The English is good but needs some grammar changes.

1. The novelty of this article is highly rated; it solves the problems of stability and robustness of the output power of semiconductor lasers.

2. The references are new and proper.

3. The figures are very clear and well-described, but in figures 9 and 10, please write the function option from the left (not in Chinese) in English - please change it.

4. The simulation and methods are well described.

I recommend a minor revision.

 

Comments on the Quality of English Language

The English is good but needs some grammar changes.

Author Response

1.The Chinese characters in Figure 9 and Figure 10 have been deleted.

2.Some modifications have been made to the English grammar.

Reviewer 4 Report

Comments and Suggestions for Authors

The author did an excellent job in his study on a high-performance driving system for a high-power semiconductor laser. Although the outcomes are decent, they are not written professionally. However, the following issues should be addressed:

1)   The paper's innovation above earlier work is unclear. You should clarify it more with references to past research.

2)   The analysis of the results is insufficient.

3)   There are some grammatical errors and mistakes in the text.

4)   At least once in the article, define the LCC.

5)   The parameters in the context must match those in the theoretical model.

6)   Improve the quality of the figures (legends,…)

Comments on the Quality of English Language

 There are some grammatical errors and mistakes in the text.

Author Response

1.Part of the introduction has been improved according to your suggestions.

2.According to your suggestions, the result analysis is improved in the conclusion.

3.The grammatical errors in the article have been modified.

4. Modify the definition of LCC according to your suggestion.

5.Modify the problem of the part of the diagram according to your suggestion.

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

1) Thanks for the explanation of LCC and QCL. Please add these explanations in the manuscript as well.

2) In Line 20 and Line 21, "Improved power efficiency and suppressed output current ripple; At the same time, the instability of the output current is ensured due to the input voltage, load and parasitic parameter change of the circuit." Please rephrase this sentence because it has grammar errors.

3) Please add detailed captions for Fig. 4 to explain the difference between these 4 pictures. This can be helpful to make readers know the difference of these pictures with the same Y axis and X axis easily.

4) Thanks for the explanation of each figure and please add those explanations where appropriate in the manuscript as well. 

Comments on the Quality of English Language

The manuscript is good and I recommend to go through again before final submission.

Author Response

1. Explanations of LCC and QCL have been included in the manuscript where appropriate.

2. PFM-PWM composite control strategy and LADRC algorithm not only improve the power efficiency of the drive power supply, suppress the output current ripple, but also ensure that the output current of the drive power supply is stable when the input voltage, load and parasitic parameters of the circuit change.

3. In figure 4, the above two graphs are the relationship curves of duty cycle (d) and frequency ratio (ω) with voltage gain and current gain. The X-axis is the duty cycle, and the Y-axis is the voltage gain and the current gain respectively; The following two graphs are the relationship curves of the transformer turn ratio (n) and frequency ratio (ω) with voltage gain and current gain. The X-axis is the ratio of turns, and the Y-axis is the voltage gain and the current gain respectively.

It has been added to the manuscript.

4. Thanks for your advice, each figure has been explained in the manuscript.