Double-Frequency-Shift Acousto-Optic Modulator with Controllable Pulse Pair Frequency Difference
, Yudong Lian 1,2,3,*, Shiwei Han 1,2, Yang Yu 1,2, Xuan Qi 1,2, Zhenxu Bai 1,2,3, Yulei Wang 1,2,3 and Zhiwei Lu 1,2,3Round 1
Reviewer 1 Report
The authors present double frequency shift loops acousto-optic modulator (AOM) with controllable output pulse frequency difference. By using the double LiNbO3 crystal reverse cascade technology, the crystal size limitation on the single small frequency shift is fixed. The results reported in the manuscript reveal that the maximum frequency shift difference of the system is limited to 2 GHz. Also, the single frequency shift accuracy and the frequency shift error are about 5 MHz and 7.8%. I have some questions and comments for the manuscript:
- Although, it seems the authors review previous publications on the subject, but there is no review of manuscripts from 2013 onwards (the last one is related to Dieulangard et al. 2013).
- After line 63, authors mentioned the principles of the system which can be moved to section 2. Instead, please give the manuscript organization at the end of Introduction.
- The frequency stability should be considered and reported.
- The main important gains in this work need to be compared with previous reports.
- Is there any environmental effect on the performance of the output, e.g. temperature? Please explain.
- As mentioned, the frequency difference between two pulses can be detected by using the beat frequency method. There are efficient methods for this reason. Please explain selecting this method considering its advantages.
- Define all abbreviations such as SBS in Conclusion (Stimulated Brillouin scattering?).
- The amplitude of the output signals with interval beat frequencies of 500 MHz; 1 GHz; 1.5 GHz; and 2GHz are different. Why? It seems that the amplitude should be independent from the beat frequency.
Author Response
Dear Reviewer,
We have submitted our point-by-point response in the form of document. Please review the attachment.
Best regards,
Authors
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Author Response.pdf
Reviewer 2 Report
See the attachment.
Comments for author File: Comments.pdf
Author Response
Dear Reviewer,
We have submitted our point-by-point response in the form of document. Please review the attachment.
Best regards,
Authors
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
The revised manuscript satisfies my comments and therefore I suggest to accept the manuscript.
