Have you measured the blank (substrate itself) using the same setting as you did for your sample? In this way, you could easily justify that your results are genuine or not.
Earlier I tried using a laser of 532 and power 1.5 but it shows more noise when compared to the present data. My major doubt lies with the peaks lying in the range 2500 to 3200 cm-1. Like the reasons for such an intense peak?