Photonic-Aid Flexible Frequency-Hopping Signal Generator Based on Optical Comb Filtering

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

Please see the attached.

Comments for author File: Comments.pdf

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

 

Abstract should be polished.

Novelty of the work should be incorporated.

Introduction can be improved by citing

https://doi.org/10.1201/9781351029421

https://doi.org/10.1016/j.ijleo.2022.168577

http://dx.doi.org/10.1016/j.ijleo.2014.08.172. 

Comments on the Quality of English Language

Some grammetical errors should be removed.

Author Response

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Author Response File: Author Response.pdf

Reviewer 3 Report

Comments and Suggestions for Authors

Dear Authors,

Allow me to get to the points:

1. "Frequency-using devices" is the first time I have seen this term used. Perhaps consider "wireless devices."  Also, "spectral congestion" is often associated with wireless communications. I recommend rephrasing the Introduction using commonly used terminology.

2. Concerning Fig. 1, I have two recommendations:

• Please highlight where (b)-(f) are on Fig. 1.  This will help the readers appreciate Fig. 1 better.
• Please briefly describe what diagrams (b)-(f) are in the caption of Fig. 1.
• Also, I believe (f) is the optical spectrum of the input to the PD, not "output".  The output of the PD is electrical.

3. I recommend including a diagram showing the OptiSystem implementation of Fig 1.  This will allow users to do their study if they wish.

4. Since this manuscript is based purely on simulation to verify the theoretical principle, I feel the current version is unsuitable for publication.  It must include additional details.  I recommend the following for your consideration, but not limited to:

• Consider the feasibility of the experimental implementation of the concept shown in Fig. 1.
• The precise control of frequency-dependent elements such as OFC, OF and OCF.
• What technology options are available to implement OFC, OF and OCF?
• Fig. 1 shows an MZI structure, which begs the question of whether there is any issue concerning self-heterodyning. This can give rise to additional noise in the system.
• Is it possible to investigate the electrical phase noise of the frequency-hopping signal? This will depend greatly on how OptiSystem models photonic and electrical devices.

For your consideration.

Best regards.

Author Response

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Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

Thank you for the authors' detailed response and abundant supplementary descriptions in the revised manuscript. After reviewing the revised manuscript and the authors' responses, I find that the revisions address my concerns appropriately. Currently, the manuscript is now clearer and the key points have been well clarified. I maintain it is now suitable for publication, with no further questions on my end.

Reviewer 2 Report

Comments and Suggestions for Authors

Revised manuscript incorporating corrections may now be accepted.

Reviewer 3 Report

Comments and Suggestions for Authors

Dear Authors,

Thank you for carefully considering and addressing the reviewers' comments.

Best regards.