Introduction
The purpose of this activity is to understand the concept of how laser is built. We will explore the absorption process, spontaneous emission and stimulated emission. When all three are combined together, laser will be emitted.
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| Absorption |
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| Spontaneous Emission |
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| Stimulated Emission |
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| Laser |
Conclusion
In the absorption, we can see that the difference of Nin and Nout gives us the value of photon absorbed. In the spontaneous emission, we can see that the photon is emitted in random direction. When the excited photon is stimulated further by a light, it will emit photon in the direction of the light that stimulates it. This phenomena is called the stimulated emission.We figure out that the pumping level required for population inversion is 65.
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