the Half width of the jain profile of helium ne laser materials is 2 x 10-³ nm the length of the cavity is 30 cm and the emission wavelength length of he - ne laser is 6328A⁰, how many longitudinal modes can be excited
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the Half width of the jain profile of helium ne laser materials is 2 x 10-³ nm the length of the cavity is 30 cm and the emission wavelength length of he - ne laser is 6328A⁰, how many longitudinal modes can be excited
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about 10-30 cm
The distance over which the waveform remains similar to a sine-wave is called the coherence-length of the beam, Lc, and it is typically about 10-30 cm for commercial He-Ne lasers.
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