The Pulsar Engineering Community Board

I have looked at another raman scattering experiment for the students. The used a sample of sulfur powder to get the temperature measurement. They then fitted a gaussian to the peaks and read their intensity off those. I have tried to get a raman spectrum of sulfur (I am aware that there is an OpenR...

I tried to get a signal with other substances. Since Isopropanol proved to have the stronges of all signals I figured that I might try out this. And as it turns out, I have finally gotten an Antistokes line. Some of the laser light still got through however I now have a really strong Stokes signal t...

I have found out that we had a notch filter available. It was a notch filter for 533 nm with 17 nm FWHM. I tested the filter by putting it at the place of the edge filter and recorded the camerapicture when there was only ambient sunlight. There was indeed a band of lower intensity on the camera (se...

As I am using python for the data analysis I found a program that searches for peaks in a sample. Further more their is another function that calculates the prominence of a peak once it is found. When the program finds a peak I use its prominance as values and set everything else to 0. I hope this h...

I managed to get a Beamsplitter with T=32%. It fit perfectly in the dichroic mirror holder. I also tried to activate the cameras color correction. I took two images. One with the ethanol filled cuvette and one with no cuvette in the holder but the laser running. I removed the laser runing image from...

Glad you liked the idea. I am currently trying to modify the setup to get the anti-stokes lines aswell. I have removed the edgepass filter and put a mirror in place of the cuvette holder to get the laser light to the camera. Then I oriented the grating to have the 532 nm light hit right in the middl...

Besides spectral analysis of chemical substances, Raman spectroscopy can also be used as a non intrucive thermometer. From the raman-spectrum of a substance it is possible to determine its temperature or temperature changes using three different methode: 1) The ratio of stokes and anti-stokes intens...

Alright I managed to redo the experiment. I used background removal to get to those results and wanted to share them here with you as a thanks for your help. I also fitted a linear function to it of the form y=a*x+b. The parameters a and b were compatible with their expected values (a=1 and b=0) wit...

I have attempted to use your instructions to redo images for ethanol and isopropanol. I did not get any good image for the ethanol with an exposure time of 10 s and gain set to 0. I then tried if I get the lines for propanol using shorter and shorter exposure times. I tried 5 s, 2.5 s, 1.25 s and 0....

I have the images taken of the isopropanol and ethanol in the zip-file attached to this post. I used 200002 µs exposure time on the camera and a gain of 47,99 dB gain. When I aligned my build up I first saw a signal with the isopropanol sample and tried ethanol next but when I did I saw nearly nothi...