Shaking molecules until Laser Light comes out. DIY Raman Laser!

Episode 60

#Raman
#Laser

In this episode, let's build a Raman Laser!
First I talk about some of the background of light scattering, Rayleigh Scattering, Raman Scattering discovered by C.V Raman, then the discovery of the Raman Laser by Gisela Eckhardt.
I cover the physical setup from an engineering standpoint.
An old Nd:YAG Tattoo Laser I refurbished is used to pump a cuvette filled with a Raman Liquid.
Although in the early experiments the megawatt Laser energy destroyed the cuvette I was using, I built a Raman cell from scratch, with replaceable windows.

Do I manage to shift 532nm green light to 629nm Red?

References:

Physics openlab: https://physicsopenlab.org/2022/01/11...

Raman Molecular bond stretching simulation: https://ir.cheminfo.org/

Stimulated Raman Scattering Video (Your Favourite TA):    • Stimulated Raman Scattering and Raman...  

SRS: https://www.chem.uci.edu/~potma/Richa...

Eckhardt: https://research.science.mq.edu.au/di...

Crystalline Raman Lasers: https://research-management.mq.edu.au...

"Simple" Raman Laser! https://psl.noaa.gov/outreach/educati...

Raman Shift Calculator: https://www.photonetc.com/raman-shift...


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0:00 Intro
0:15 Light Scattering
0:47 Rayleigh Scattering
1:22 Raman Scattering
2:26 Stimulated Raman Scattering SRS
3:14 Raman Laser development
4:19 Commercial Raman Lasers
5:14 Raman Laser Explanation
6:39 Intitial Experiment; Laser ate itself!
7:16 Raman Laser build
7:48 Raman Laser setup
9:41 First Light!
10:44 Measuring the wavelength
11:39 Conclusions and future work