Review Reports

Round 1

Reviewer 1 Report

The autohrs demonstrated the dispersion-managed, high-power, Tm-Ho co-doped ultrafast fiber laser using SWNT saturable absorber. In-line spectral filter was developed to control the output pulse spectra. Considering the quality of the manuscript, I recommend publication of this paper after several questions are clarified.

1. In Figure 3, the authors provide the experimental transmission spectra of the in-line tunable filter. Could the authors provide more details about the meaasurement method of the transmission spectra? Why the sharp dips were not observed in the experimental transmission spectra in Figure 3(a)?

2. In page 5, paragraph 1, the authors declared that "Since there was the limitation of bandwidth by spectral filter, the mode-locking was not obtained around zero-dispersion region". The authors didn't make the question clear. What's the relationship between the bandwidth of spectral filter and the zero-dispersion value? Could the authors give more explanations of the physical principle.

3. Could the authors provide detailed property comparision of film A and film B, such as SEM and Raman spectra? Did film A and film B are obtained randomly or controlled?

 

Author Response

Thank you very much for detailed review and valuable comments. Considering the reviewer’s comments, we revised the manuscript.

Author Response File: Author Response.pdf

Reviewer 2 Report

The paper demonstrated a dispersion-managed, high-power, Tm-Ho co-doped ultrashort pulse fiber laser using SWNT, different mode-locking regimes are thoroughly analyzed by considering the influence of modulation depth, dispersion and spectral filtering. The paper can be accepted after clarifying the following concerns.

(1) What's the reason for the discrepancy between numerical and experimental result in Fig.3 and the different peak-peak contrast when tuning the wavelength?

(2) How to tuning the central wavelength of mock-locking spectrum shown in Fig. 4(b) and (d)? Could the spectral filter be used to tune the central wavelength of the mode-locking laser? 

Author Response

Thank you very much for detailed review and valuable comments. Considering the reviewer’s comments, we revised the manuscript.

Author Response File: Author Response.pdf