Helium Neon laser, basic set  
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Unknown Principle The difference between spontaneous and stimulated emission of light is demonstrated. The beam propagation within the resonator cavity of a He-Ne laser and its divergence are determined, its stability criterion is checked and the relative output power of the laser is measured as a function of the tube's position inside the resonator and of the tube current. Benefits - Set up and run a laser, that is by now classic, from its constituting elements
- Get a feel for the delicate adjustments necessary to achieve lasing conditions
- Dicover the way many parameters can influence the output of this gas laser
Tasks - Set up the He-Ne laser. Adjust the resonator mirrors by use of the pilot laser (left mirror: VIS, HR, plane; right mirror: VIS, HR, R = 700 mm).
- Check on the stability condition of a hemispherical resonator.
- Measure the integral relative output power as a function of the laser tube's position within the hemispherical resonator.
- Measure the beam diameter within the hemispherical resonator right and left of the laser tube.
- Determine the divergence of the laser beam.
- Measure the integral relative output power as a function of the tube current.
The He-Ne laser can be tuned using a BFT or a LTP. Learning objectives - Spontaneous and stimulated light emission
- Inversion
- Collision of second type
- Gas discharge tube
- Resonator cavity
- Transverse and longitudinal resonator modes
- Brewster angle
Scope of delivery |
Experiment set Helium-Neon Laser
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08656-93
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1
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PHYWE Digital multimeter, 600V AC/DC, 10A AC/DC, 20 MΩ, 200 µF, 20 kHz, −20°C…760°C
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07122-00
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1
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Scale, l = 750 mm, on rod
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02200-00
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1
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Diffraction grating, 600 lines/mm
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08546-00
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1
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Plate holder
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02062-00
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1
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Slide mount for optical bench expert
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08286-00
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1
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Barrel base for 1 rod
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02004-00
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1
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Vernier calliper stainless steel 0-157mm, 1/20
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03010-00
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1
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Connection box
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06000-00
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1
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Resistor 10 Ohm 2%, 2W, G1
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06056-10
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1
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Resistor 100 Ohm 2%, 1W, G1
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06057-10
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1
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Resistor 1 kOhm, 1W, G1
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39104-19
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1
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Resistor 10 kOhm, 1W, G1
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39104-30
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1
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Resistor 100 kOhm, 1W, G1
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39104-41
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1
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Connecting cable, 32 A, red, various lengths
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07362-01
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1
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Connecting cable, 32 A, blue, various lengths
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07362-04
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1
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Protection glasses HeNe-laser
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08581-10
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1
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Acetone, chemical pure, 250 ml
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30004-25
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1
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Service
