Self-Starting Soliton–Comb Regimes in χ(2) Microresonators
Round 1
Reviewer 1 Report
Please see comments in the attached pdf file
Comments for author File: 
Comments.pdf
The manuscript English is quite poor, and it should be mandatorily revised prior to acceptance.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Reviewer 2 Report
The review article entitled" Self-starting soliton-comb regimes in χ(2) microresonators "by B. Sturman presented a systematic study on the generation of χ(2) soliton-comb. The theorectical background and governing equations are first discussed, and then detailed investigation of the solutions to the soliton-combs are analyzed. Finally, a discussion of the present issues are presented. The overall quality of this review is high and logically sound. There are several issues to be addressed before publication:
1. The authors mentioned phase matching in page 2, line 76. Generally, the PM refers to the condition of wave VECTOR matching, instead of FREQUENCY. frequency match is the measure of energy conservation while phase match usually comes after momentum conservation. The author should comment on this.
2. The review only mentioned LN as the platform for χ(2) soliton-comb generation. Other existing materials should also be included and compared
3. Radial poling of LN is a viable route for QPM, how to realize such radial poling?
4. So far, the experimental demonstration of χ(2) soliton-comb is yet to be observed. Though challenges are presented, the authors are recommended to provide possible solutions or valuable suggestion for future reseach.
There are too many paragraphs and each paragraph is short. The author should combine them and be more concise.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Reviewer 3 Report
The paper is informative and well written, it can be published as a review in its present form. However, in order to increase the self-consistency and thus broaden the target group of readers to non-specialists in optical micro-resonators, I suggest the authors to include in the Introduction a short description of the field, with details on the specific concepts: comb as dissipative soliton, Hi-resonators, phase matching scheme, etc.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
