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Problems |
31.1) |
Find out how a laser pointer works. What are the precautions you should take while using lasers in general? |
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31.2) |
Draw the energy level diagram of the four level argon ion laser. |
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31.3) |
The neodymium Laser has two unstable excited sates which quickly decay to a4F metastable state. Laser |
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action occurs between this state to the 4I stage at wavelength 1.06  m. The state 4I decays thermally to the ground state. Draw the energy level diagram for this laser. |
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31.4) |
Find out from literature/websites examples of dye lasers (tunable) and the range of frequencies wherein they can |
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be used. If you need to excite the carbonyl group at 1700 cm -1, which laser will you use? |
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31.5) |
If the coherence length for a sodium lamp is 500nm and the wavelength of light is in the range of 6000  , what |
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is the spread in wavelengths,  ? |
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31.6) |
Calculate the power output of a laser in which 1J pulse can be given out in 5 ns. |
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