A Comprehensive Study on Phase Sensitive Amplification and Stimulated Brillouin Scattering in Nonlinear Fibers with Longitudinally Varying Dispersion

Round 1

Reviewer 1 Report

See the attached file.

Comments for author File: Comments.pdf

Author Response

Dear Reviewer

I and my colleagues would like to express our gratitude for your
valuable comments and suggestions.  We have revised our manuscript based on
your comments.  The newly added and revised sentences are highlighted in
red for easy identification and reading.  The details can be found in our
response letter prepared in the form of point-to-point basis.  We believe
that the revised manuscript could meet the expectations of the reviewers and
we hope it can be considered for publication in the MDPI Photonics.

Sincerely yours

Alexej Sysoliatin

Author Response File: Author Response.pdf

Reviewer 2 Report

In this manuscript, the authors reported the phase sensitive amplification and stimulated Brillouin scattering in nonlinear fibers with longitudinally varying dispersion. Study found that, a sinusoidal dispersion profile would provide a better phase sensitive amplifier performance compared to other kinds of dispersion profiles. In general, the manuscript contains new scientifically important information. I support it to be published in Photonics. However, I have some comments which need to be clarified before publication.

1. In Fig.4(c), plot of gain of the signal is significantly different from other plots, what is the physical reason for this? Please comment on it.

2. In Fig.10 and Fig.11, (b)(e)(h) and (a)(c)(d)(f)(g)(i) are significantly different, what is the physical reason for this? Please comment on it.

3. Recently, many fiber devices were demonstrated to be the good nonlinear optical devices [i.e., Chin. Opt. Lett., doi: 10.1364/COL.19.071405, etc]. Dispersion oscillating fiber as a new device, what’s its advantage, compared to other devices? Authors are encouraged to discuss it.

4. The languages need to be further polished seriously.

The languages need to be further polished seriously.

Author Response

Dear Reviewer

I and my colleagues would like to express our gratitude for your
valuable comments and suggestions.  We have revised our manuscript based on
your comments.  The newly added and revised sentences are highlighted in
red for easy identification and reading.  The details can be found in our
response letter prepared in the form of point-to-point basis.  We believe
that the revised manuscript could meet the expectations of the reviewers and
we hope it can be considered for publication in the MDPI Photonics.

Sincerely yours

Alexej Sysoliatin

Author Response File: Author Response.pdf

Reviewer 3 Report

The paper presents a comprehensive study on designing a phase-sensitive amplifier (PSA) with a tailored dispersion fiber. The research showed that fibers with sinusoidally oscillating dispersion profiles are promising for high-gain PSAs, as they allow for the use of high pump powers due to an increased stimulated Brillouin scattering (SBS) threshold. The authors demonstrated that single-pump PSAs can be customized for amplification at large pump-signal detunings. Additionally, the study demonstrated that phase-sensitive amplification can be achieved in high-order modulation instability sidebands of a single-pump PSA. Furthermore, the research investigated SBS mitigation properties and proposed optimal profiles for achieving substantial SBS thresholds. Experimental confirms the applicability of dispersion-optimized fibers in high-gain PSAs, both in terms of SBS performance and parametric amplification. These findings open new avenues for optimizing DOF dispersion profiles and building PSAs with superior performance compared to standard highly nonlinear fibers. This paper delivers a comprehensive exploration of phase-sensitive amplifiers with customized dispersion fibers. The combination of theory, numerical analysis, and experimental verification enhances the scientific soundness and ensures the impact of the paper. I have only minor comments/questions regarding the paper:

1.       The acronym EDFA was not spelled out in the first paragraph. It would be helpful to add the full name.

2.       For section 3, with all parameters given, the pump-signal separation Omega_ps can be calculated based on Eq. 10 as a constant. Can the author share more details about how the x-axis in Figure 4 is varied?

Author Response

Dear Reviewer

I and my colleagues would like to express our gratitude for your
valuable comments and suggestions.  We have revised our manuscript based on
your comments.  The newly added and revised sentences are highlighted in
red for easy identification and reading.  The details can be found in our
response letter prepared in the form of point-to-point basis.  We believe
that the revised manuscript could meet the expectations of the reviewers and
we hope it can be considered for publication in the MDPI Photonics.

Sincerely yours

Alexej Sysoliatin

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

See the attached file.

Comments for author File: Comments.pdf

Author Response

Dear Editor,

We would like to submit the revised manuscript entitled "A Comprehensive
Study on Phase Sensitive Amplification and Stimulated Brillouin Scattering
in Nonlinear Fibers with Longitudinally Varying Dispersion", which we wish
to be considered for publication in the MDPI special issue "Design and
Applications of Optical Amplifiers".

This manuscript describes original work and is not under consideration by
any other journal.  All authors approved the manuscript and this submission. 

We appreciate your time and assistance.

Yours sincerely

Alexej Sysoliatin

General Physics Institute
119333 Moscow, Vavilov street, 38.
Russia
E-mail: [email protected]

please see attached file:

DOF_Paper___Response_to_review_comments__blue_marked_response_.pdf

Author Response File: Author Response.pdf

Round 3

Reviewer 1 Report

The authors properly response to my questions. Now, I understand what the authors have done.