Question

Why are high frequency lasers difficult to create?

Answer 1

Stirling engines have extremely poor power density (i.e. they need to be extremely large, and .... and pressures are better, there comes a point where building the heat collectors becomes too difficult.

Answer 2

Answer:

Stimulated emission is the basis for how lasers operate.

Explanation:

• The process by which an incoming photon of a certain frequency interacts with an excited atomic electron (or other excited chemical state) and causes it to fall to a lower energy level is known as stimulated emission.
• We obtain coherent and monochromatic laser emission because, in the stimulated process, the released photon is in phase with the incoming photon.
• Spontaneous emission is another sort of emission from the excited state of an atomic electron.
• Without interacting with other photons, spontaneous emission occurs, and the direction and phase of the released photons are random.
• Directly inversely related to the cube of frequency is the ratio of the likelihood of spontaneous to that of stimulated emission.

As a result, spontaneous emission predominates at high frequencies, making laser operation challenging.

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