Determining the wavelength of the light of an He-Ne laser using a Fabry-Perot interferometer

VP5.3.5.3
Determining the wavelength of the light of an He-Ne laser using a Fabry-Perot interferometer
Determining the wavelength of the light of an He-Ne laser using a Fabry-Perot interferometer

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Description

In the experiment P5.3.5.3 the mirrors on the laser base plate are arranged to set up a Fabry-Perot interferometer with two parallel mirrors in line. The first semi-transparent mirror splits the light beam, while the second fully reflective mirror reflects the light back to overlap with the first reflected beam. Moving the second mirror will change the length of the resonator, thus changing the interference pattern and enables the measurement of the laser wavelength.

Components of equipment sets

1 47340  8  Laser optics base plate LD
1 471832 He-Ne laser, unpolarised LD
1 473412 Laser mount LD
5 473421  8  Optics base LD
2 473432  4  Beam divider, 50 % LD
2 473431  8  Holder for beam divider LD
1 473461  8  Planar mirror with fine adjustment LD
1 47348  8  Fine adjustment mechanism LD
1 473471 Spherical lens, f = 2.7 mm LD
1 44153  8  Screen, translucent LD
1 30011  4  Saddle base LD
1 31102  4  Metal rule, 1 m LD
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