Helium Neon laser, basic set
he 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. The following items can be realised with advanced set 08656-02. By means of a birefringent tuner and a Littrow prism different wavelengths can be selected and quantitatively determined if a monochromator is available. Finally you can demonstrate the existence of longitudinal modes and the gain profile of the He-Ne laser provided an analysing Fabry Perot system is at your disposal.
- 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
Slide mount for optical bench expert
Diffraction grating, 600 lines/mm
Protection glasses HeNe-laser
Experiment set Helium-Neon Laser
Sliding device, horizontal
Photoelement
Acetone, chemical pure, 250 ml
Resistor 1 kOhm, 1W, G1
Resistor 10 kOhm, 1W, G1
Resistor 100 kOhm, 1W, G1
Plate holder
Scale, l = 750 mm, on rod
Vernier calliper stainless steel 0-160 mm, 1/20
Connection box
Resistor 10 Ohm 2%, 2W, G1
Resistor 100 Ohm 2%, 1W, G1
DMM, auto range, NiCr-Ni thermocouple
Connecting cord, 32 A, 750 mm, red
Connecting cord, 32 A, 750 mm, blue
Barrel base expert
- 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.
- Spontaneous and stimulated light emission
- Inversion
- Collision of second type
- Gas discharge tube
- Resonator cavity
- Transverse and longitudinal resonator modes
- Birefringence
- Brewster angle
- Littrow prism
- Fabry Perot Etalon