Reducing the Crosstalk in Collinear Holographic Data Storage Systems Based on Random Position Orthogonal Phase-Coding Reference
, Jianan Li, Dakui Lin *, Hongjie Liu, Yongkun Lin, Jianying Hao, Kun Wang, Xiao Lin and Xiaodi Tan *Round 1
Reviewer 1 Report
The development of methods for compact and long-term data storage is one of the most important tasks in modern information technologies. The utilization of holographic methods for long-term data storage holds promise for achieving high information capacity and fast read/write speeds, in addition to other advantages. Currently, extensive research is being conducted in this field, covering both theoretical and practical aspects. Furthermore, there are efforts underway to commercialize holographic memory systems.
In the study titled "Reducing crosstalk in collinear holographic data storage systems based on random orthogonal phase-coding reference waves" by authors Haiyang Song and colleagues, a novel mechanism for mitigating cross-modulation noise in holographic memory systems is presented.
Despite some relevance of the direction of the study, I would like the authors to comment on the following:
1. What is the global advantage of holographic memory over, for example, https://onlinelibrary.wiley.com/doi/full/10.1002/lpor.202100563?
2. What is the novelty of the study if there were similar works - 10.1364/OE.26.003828, https://ieeexplore.ieee.org/document/735769, etc.?
3. If the authors appeal to holographic memory, then I would like to have some estimates on the amount of recorded information (or its density). What is the probability of a bit error...
Author Response
Please see the attachment.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
The article presents the method for reducing crosstalk in CHDSS based on the use of random position orthogonal phase coding reference wave. Experimental results of comparing the ROPCR method with the SOPCR method are presented.
1. I would like to see more specifics in the Abstract that reflect the content of the article. State that the proposed method is compared with the SOPCR method. Indicate how the proposed method is more effective. In my opinion, the sentence "This study will help us to better understand CHDSS with orthogonal phase codes." is superfluous here. Or indicate what exactly you managed to understand better.
2. Please check the text formatting rules – is it allowed to indicate abbreviations in the Abstract? If not, move them to the main text.
3. I am confused by the references in the introduction to literature that is more than 5 years old. Is the topic still relevant today? There are only 6 references to works written over the last 5 years.
4. Sentence “The P-SLM uploads phases according to the modulation of the coding matrix introduced in Section 2.1.” is in section 2.1, replace with “...in this section” or shorten to “The P-SLM uploads phases according to the modulation of the coding matrix”.
5. In some places it is written “Figure.”, lines 121, 213, 259. Remove point or shorten the word “Figure”. Please refer to the rules for formatting articles in this journal.
6. In the sentence in lines 134-136, please add punctuation marks and remove capital letters from the words. There is no decryption for kr.
7. Line 140 references figure 4b, whereas the previous figure was 1. I suggest moving figure 4a-b after this paragraph and renumbering all figures.
8. All the pictures are too small, nothing can be distinguished in them.
9. The description of the proposed method in lines 143-153 is very difficult to understand. Can this be represented schematically? Or describe it in other words.
10. Figures 5 and 6 are presented before they are mentioned in the text.
11. Section 6. Patents – empty.
12. I propose to seriously reconsider the structure of the article. Now the description of methods, results and discussion are mixed in the article and are not presented consistently.
I suggest that authors seriously reconsider the structure of the article, the abstract and work on the list of references.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Round 2
Reviewer 2 Report
Dear authors,
Thank you for your replies and attention to my comments.
There should be a link to Figure 3 somewhere in the paragraph from line 175.
It was interesting for me to study your article. Best regards.
Author Response
Q: Thank you for your replies and attention to my comments. There should be a link to Figure 3 somewhere in the paragraph from line 175. It was interesting for me to study your article. Best regards
A: Thank you for your attention and interest in my article! I am happy to have your support and encouragement. In the paragraph at the beginning of line 175, I've changed the link to Figure 3.
