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About second harmonic generation in an acetic acid

About second harmonic generation in an acetic acid

We made an experiment showing that a second harmonic generation can happen not only in non-linear crystals but also in liquids.

 

We launched the laser on 99% power on a metal piece through the acetic acid.

The laser beam in unfocused (+-1-3 mm) [facal range is 80 mm]

The green flash happens ever 1-2 seconds.

 

For an experiment we used:

  • an old HDD disk
  • an acetic acid (9%)
  • a 10 watt Endurance DPSS laser module (Nd:YAG 1064 nm, 7-10 ns pulse width, Frequency: 25-30 kHz, laser beam spot 40 uM, TTL power: 99%)

 

For an effect detection we used:

A mirror Canon 60D camera with 15-85 lens (max zoom) + green filter

Ultra-fast snapshot.

 

Red flashes (1064 / 808 nm)

About second harmonic generation in an acetic acid About second harmonic generation in an acetic acid About second harmonic generation in an acetic acid About second harmonic generation in an acetic acid

Green flashes (~532 nm)

About second harmonic generation in an acetic acid About second harmonic generation in an acetic acid About second harmonic generation in an acetic acid About second harmonic generation in an acetic acid

 

Original images  (ZIP file) >>>

 

 

A video of the experiment

 

 

About an Endurance 10 watt DPSSL

An Endurance Brand New DPSS Laser Module For Metal Marking & Metal Cutting!

 

Experiments with an Endurance 1064 nm DPSSL module

 

Endurance have started to work on SHG (532 nm), THG (355 nm), FHG (266 nm)

 

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